Cellulose product and a method for preparation thereof

FIELD: paper-and-pulp industry.

SUBSTANCE: cellulose product contains clay having stacking of atomic planes 2R2. Product represents paper of fibrous pulp, while clay has cationic nature. Preparation of product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding clay having stacking of atomic planes 2R2.to suspension; and dehydrating thus prepared suspension. Another method of preparing cellulose product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding cationic clay to suspension; adding one or several draining auxiliary substances enhancing retention of filler and containing at least one cationic polymer; and dehydrating thus prepared suspension.

EFFECT: reduced interfering and harmful substance in cellulose suspension and enhanced retention of filler, dehydrating agents, and sizing agents.

27 cl, 14 tbl, 13 ex

 

The present invention relates to a method for producing a cellulose product, which includes the processing of cellulose fibers using clay, with stacking of atomic planes 3R2, and to a method for producing a cellulose product, which includes the processing of cellulose fibres with cationic clay. The present invention also relates to cellulosic products containing clay having the stacking of atomic planes 3R2.

The level of technology

Suspension of the fibrous mass are widely used in the manufacture of cellulose products, such as fibrous mass and paper, and contain, in addition to cellulose fibers, also compounds that have a negative impact on the production process. Such compounds are in pulp suspensions, occurring from the primary fiber and pulp and recycled fiber pulp.

In suspensions of primary fibrous mass of such nuisance/harmful substances are primarily hemicellulose, lignin, and also lipophilic and hydrophilic extractable substances. In addition to cellulose, these substances are to varying degrees dissolved or colloidal dispergirovannykh in the process water during operations of boiling and bleaching. Compounds that are released during the operations of boiling and blanching, usually upon Nutsa in General as resin. Examples of the resin include wood resin, such as extractable lipophilic substances (fatty and resin acids, sterols, complex stearyl esters, triglycerides), and also fats, terpenes, terpenoids, waxes and the like.

In suspensions of recycled fibrous mass compounds having a negative impact on the process of making paper, consist mainly of adhesives, ink and latex-based thermoplastics, in General, multiple connections, which together are commonly referred to as sticky substances. In addition to the resin and sticky substances, the suspension also contains charged impurities like salts, and various polymers of wood, from which charged, weakly charged or uncharged compounds compete with cellulose in the ratio of adsorption and interaction with chemicals added to improve performance, such as draining and improving the fixation of filler excipients, agents for the ring, and the like. Typically, these interfering compounds are referred to as anionic trash.

All the above compounds are included in the processes of creation of pulp and paper in different ways. For example, some of them precipitious because of changes properties of a suspension of the fibrous mass and can be deposited on various mechanical parts bulahdelah is through the machine, such as mesh and cloth. Over time, precipitation will lead to failure of the paper machine, often in the form of a rupture in the fabric of the paper, while the paper machine should be stopped for cleaning. In addition, the paper mill are committed to recycling recycled water to the extent greater than previously, which increases the presence of nuisance and harmful substances in suspension.

Various additives are used to reduce the negative impacts of the above harmful/interfering substances. For example, adsorption resin and sticky substances widely used talc. To reduce exposure to harmful compounds using different types of clay.

Published patent application of Japan No. 1985-94687 relates to absorbent resin agent containing hydrotalcite.

The invention

The present invention generally is directed to a method in which cellulose fibers are treated with clay, with the stacking of atomic planes 3R2. The present invention is also generally directed to a method in which the cellulose fiber is treated with a cationic clay. In addition, the present invention is directed to a method of obtaining a cellulose product, which includes the addition of clay, with the stacking of atomic planes 3R2to the aqueous suspension containing the Zell is religious fibers. In addition, the present invention is generally directed to a pulp product containing clay having the stacking of atomic planes 3R2.

In addition, the present invention relates to a method for producing a cellulosic product which comprises: (i) creation of a water suspension containing pulp fibers; (ii) adding to the suspension of clay with the stacking of atomic planes 3R2,and optionally one or more drainage (dewatering) and increase the fixation of filler excipients; (iii) dewatering the obtained suspension. In addition, the present invention relates to a method for producing a cellulosic product which comprises: (i) creation of a water suspension containing pulp fibers; (ii) adding to the suspension a cationic clay; (iii) adding to the suspension one or more drainage (dewatering) and increase the fixation of filler excipients containing at least one cationic polymer; (iv) dewatering the obtained suspension. Produced cellulose and preferably is a fibrous mass and/or paper.

Detailed description of the invention

Unexpectedly found that the negative impact on the manufacturing processes of pulp and paper due to the presence of nuisance and time the different substances in aqueous suspensions of cellulose fibrous mass, in particular the problems caused by tar and sticky substances can be reduced by processing cellulose fibers clay in accordance with the present invention.

It was also unexpectedly discovered that the addition to the pulp suspension of clay in accordance with the present invention, in particular cationic clay and/or clay 3R2in combination with the additives used for the manufacture of pulp and paper, not only allows for the absorption and removal of interfering substances, but it also improves performance additives used in the method, compared with the situation where the clay is added. Examples of such additives, for which the observed performance improvements include enhancing the fixation of filler and drying excipients, agents for the ring, and the like. Preferably, the clay is used in conjunction with one or more draining and improving the fixation of the auxiliary filler substances containing at least one cationic polymer. Thus, the present invention provides for improved drainage (dewatering) and retention in the methods of manufacturing a fibrous pulp and paper, as well as improved sizing in the process of making paper, however, although the NGOs, further reducing the content of nuisance and harmful substances in the pulp suspension.

Clay according to the present invention can be obtained from natural clays, chemically and/or physically modified natural clays and synthetic clays. Natural clay, as a rule, are of essentially crystalline structure. However, synthetically derived clays can also optionally contain amorphous material having essentially the same chemical composition as the crystal structure. The amount of amorphous material present in the synthetic clay, depends largely on the parameters of the reaction. The term "clay"as it is used here, refers to clays that have essentially crystalline structure and clay, containing both crystalline and amorphous structure.

Clays are characterized by a layered structure, where the atoms in the layers (the leafs) are cross stitched through chemical bonds, while the atoms of adjacent layers interact mainly with physical strength. Layers of clay can be uncharged or charged, depending on the type of atoms present in the layers. If the layers are charged, then the space between these layers, referred to as interlayer space contains ions that have a charge, across the lagoon is false in relation to the charge layers. The term "cationic clay"as it is used here, refers to the clays, which have positively charged layers and anions present in the interlayer space. The term "anionic clays", as it is used here, refers to clays with negatively charged layers and cations present in the interlayer space. Usually ions in the interlayer space can participate in ion exchange.

Clay of the present invention can in principle be any anion, and, optionally, water molecules present in the interlayer space. Examples of common anions that may be present in the interlayer space, include the NO3-, OH-, Cl-, Br-I-, CO32-, SO42-, SiO32-, CrO42-BO32-, MnO4-, HGaO32-, HVO4-and ClO4-and also bar or intercalating anions, such as V10O286-and MO7O246-monocarboxylates such as acetate, dicarboxylates, such as oxalate, alkyl sulphonates, such as laurylsulfate, usually, hydroxide and carbonate. Natural clay of the present invention typically have a carbonate anions in the interlayer space.

Conveniently, h the Oba layer or lamella clay contained, at least two different transition metal atoms with different valence. Convenient to one metal atom was bivalent, and the other metal atom was, respectively, trivalent. However, the layer may also contain more than two atoms of metals. The charge of the layer is determined by the ratio of metal atoms with different valence. For example, more trivalent metals will create a layer with a high density of positive charge. Convenient to the clay according to the present invention contain layers containing divalent and trivalent metals in some respects, so that the total charge layers was cationic and the space between the layers contained anions. Preferably, the layers consist mainly of divalent and trivalent metals in this respect, the total charge layer is cationic.

The obtained synthetic and natural clays in accordance with the present invention may have the General formula:

[Mm2+Mn3+(OH)2m+2n] Xn/zZ-bH2O,

where m and n are, independently from each other, are integers having a value such that m/n is in the range from 1 to 10, preferably from 1 to 6, more preferably from 2 to 4, and most preferably has a value of about 3; and b before the hat is an integer, having a value ranging from 0 to 10, conveniently it to be a value from 2 to 6, and often a value of about 4; Xn/zZ-represents an anion, where z is an integer from 1 to 10, preferably from 1 to 6, it is convenient to Xn/zZ-included NO3-, OH-, Cl-, Br-I-, CO32-, SO42-, SiO32-, CrO42-BO32-, MnO4-, HGaO32-, HVO4-and ClO4-,column (stack) anions and the anions include, such as V10O286-and MO7O246-monocarboxylates such as acetate, dicarboxylates, such as oxalate, alkyl sulphonates, such as laurylsulfate; M2+represents a divalent metal atom, are suitable for use divalent atoms of metals include Be, Mg, Cu, Ni, Co, Zn, Fe, Mn, Cd and Ca, preferably Mg; M3+represents a trivalent metal atom, are suitable for use trivalent atoms of metals include Al, Ga, Ni, Co, Fe, Mn, Cr, V, Ti and In, preferably Al. Preferably, the divalent metal is magnesium, and the trivalent metal is aluminium, which leads to the General formula:

[Mgm2+Aln  3+(OH)2m+2n] Xn/zZ-bH2O.

In accordance with one of preferred embodiments of the present invention, the clay is cationic. Examples of usable cationic clays in accordance with the present invention include hydrotalcite, manasseite, pyroaurite, serenit, static, Barberton, takovite, reevesite, desautels, motukoreaite, vermland, Meixner, Coalinga, chloromelanite, karaboga, honest, woodwardite, iowait, hidrogenesse, mounkaila and the like. Examples of terms used to describe these clays include compounds such hydrotalcite, and layered compound double hydroxides.

In accordance with another preferred embodiment of the present invention, the clay has a specific stacking of atomic planes, namely the stacking of atomic planes 3R2; this type of clay is referred to here as the "clay 3R2". Clay 3R2is preferably cationic and can be any of those discussed above. Preferably, the clay is a clay 3R2,containing magnesium and aluminum. Accordingly clay 3R2has a period of three layers. Politi clay with the stacking of atomic planes 3R2has a different layout/styling of atomic PLoS is awn layers, than politiy with the stacking of atomic planes 3R1referred to here as the "clay 3R1". Clay 3R1and 3R2may differ from each other in paintings diffraction/reflection of x-rays, the intensity of the reflections of the dhkl107 and 108. Clay 3R2has a stronger reflection of the dhkl107 near 2 theta 45° (according Drits and Bookin), while clay 3R1has a stronger reflection of the dhklnear 2 theta 47° (a reflection of dhkl108). The presence of peaks as 2 theta 45°and 2 theta 47°indicates the presence of a mixture of clay 3R1and 3R2. It is clear that the exact values of 2 theta for reflections dhkl107 and 108 will depend on the structural lattice parameters "a" and "c" for a given clay, such as clay, Mg-Al. Of course, there are also some other differences in the pictures of the x-ray diffraction, but it is assumed that this range is the best range of reflections dhklto obtain such differences. In addition, the clay, with the stacking of atomic planes 3R2has a morphology that is different from the normal morphology of clay 3R1and can be detected through analysis by means of SEM (scanning electron microscope). Clay 3R2evidently, has a structure with an irregular hlopeobraznoj plates, which aglomerados indiscriminate about the time, while conventional and known from the literature clay 3R1have regular, well-formed layers of plates, which are arranged in the usual form of the foot.

Clay, having the stacking of atomic planes 3R2in accordance with the present invention, can be obtained by hydrothermal (Zolotarenko) treating the suspension containing a source of aluminum and a source of magnesium. Examples of suitable clays with stacking of atomic planes 3R2such as clay , Mg-Al, in accordance with the present invention, and methods for their preparation include those described in published International application no WO 01/12550, the description of which is thus included here as a reference.

In accordance with one of preferred embodiments of the present invention, the clay, with the stacking of atomic planes 3R2is added to the aqueous suspension containing pulp fibers, the method of obtaining a cellulose product that is similar to the fibrous mass, and paper. It is observed that, if the clay 3R2added to this suspension is improved removal of interfering substances, such as tar and sticky substances, compared with the addition of conventional clay with the stacking of atomic planes 3R1.

Clay conveniently be mixed with the cellulose fibers in what redstem added to the aqueous suspension, containing cellulose fibers (also referred to as "aqueous pulp suspension" and "pulp suspension")or in suspension (suspension)or powder, which can easily dispergirujutsja in the water. Suspension or clay powder can also contain other components, such as dispersing and/or protective agents that can contribute to the overall impact of the clay. Such agents may be nonionic, anionic or cationic in nature. Examples suitable for use by protective agents or colloids include water-soluble derivatives of cellulose, such as hydroxyethyl - and hydroxypropyl-, methylhydroxypropyl and metilgidroxiatilzelllozu, methyl and carboxymethyl cellulose, gelatin, starch, guar gum, xanthan resin, polyvinyl alcohol and the like. Examples of usable dispersing agents include non-ionic agents, such as ethoxylated fatty acids, fatty acids, ALKYLPHENOLS or amides of fatty acids, ethoxylated and methoxylamine complex glycerol esters, sorbitol esters of fatty acids, nonionic surfactants, polyols and/or their derivatives; anionic agents, such as alkyl or alkylaryl sulfates, sulfonates, simple ethersulfate, polyacrylic acid and a cationic agent, e.g. the measures exterkate, obtained by interaction of alkanolamines with mixtures of fatty acids and dicarboxylic acids, optional alkoxysilane derived esters and the quaternization products, amides quaternionic fatty acids, betaines, salt, dimethyl dialkyl or dialkylated ammonium cationic and paired dispersing agents.

Clay can be added at any point in the manufacturing process of the cellulose product, starting from the point where dissolved wood chips, and to the point in the process where dewatering the pulp suspension. Cellulose product may be in any form, as for example in the form of a cloth or sheet, for example, sheets of fibrous masses and sheets of paper.

In accordance with a preferred embodiment of the present invention, the clay is added to the pulp suspension, a method of manufacturing a fibrous mass. Clay can be added before or after the cooking process, which can be a Kraft process, mechanical, thermomechanical, mechanical, termomehanicheski the cooking process. Clay may be added immediately before the cooking process or directly in the cooking process, for example, in digester. However, it is preferred that the clay was added to the pulp slurry chemical digestion, for example, after washing and the preparations for sulfate pulp or after mechanical cleaning (mechanical) fibrous mass. Typically, the cellulose fiber is bleached in the multistage process of bleaching, which includes different stages of bleaching, and clay may be added in any order with respect to bleaching. Examples of relevant stages of the bleaching stage include chlorine bleaching, for example stage bleaching of elemental chlorine and chlorine dioxide stage neklanova blanching, for example the stage with peroxide such as ozone, hydrogen peroxide and peracetic acid, and combinations of stages chlorine and neklanova bleaching and oxidation, optionally, in combination with the stages of recovery, similar to the processing by dithionite. The clay can be added to the pulp suspension directly on the stage of bleaching, preferably, in the mixer before oxide tower, at any point between stages of bleaching and washing, as well as on the stage of leaching, where the clay can be partially or completely removed, for example, in the section of the separation.

In accordance with another preferred embodiment of the present invention, the clay is added to the cellulose suspension of the manufacturing process of paper. The clay can be added to the pulp slurry at any point in the paper manufacturing process, for example in fatty pulp, skinny pulp or recycled water prior to its recycling, i.e. before the pressure box for thin paper the mass. Preferably the clay is added to the oily paper weight. Cationic clay may also be added to more than one point of the manufacturing process of pulp and/or paper. For example, in the Unitedpulp and paper mills clay may be added in a process for pulping and, optionally, also in the paper production process, and one or more drainage and increase the fixation of filler excipients may be added in the process of obtaining paper. Such processes may include dewatering the pulp suspension containing clay, dilution resulting suspension, adding to the diluted suspension one or more drainage and increase the fixation of filler excipients and dewatering the suspension containing drainage and increase the fixation of filler excipients.

The term "paper"as it is used here, includes not only paper and receive it, but also other products containing cellulosic fibers, such sheets or canvases, such as cardboard and reinforced cardboard, and their production. The method can be used in the production of paper from different types of aqueous suspensions of cellulose (containing cellulose) fibers, and the suspension should accordingly contain, at least 25% of the mass, and preferably at least 50% of the mass of such fibres, in relation to the dry substance. Cellulose fibers can be based on primary and/or recycled fibers, and the suspension may be based on fibres from chemical fiber pulp, such as sulphate, sulphite fiber and pulp and fibrous mass on the basis of organic solvents, mechanical fibrous mass, such as thermomechanical fibrous mass, termomekhanicheskoe fibrous mass, the treated fibrous mass and the mass of the crushed wood from both hard and soft rocks, and may also be based on recycled fibres, not necessarily from the bleached fibrous masses, and their mixtures. If you are using recycled fiber, suspended, recycled fibers jointly processed to separate neurogeometry components, such as ink for the printer and various compounds for surface treatment of paper, for example, latex, from the fibers. In the preferred embodiment, it is convenient to add the clay in this process of decolorizing treatment.

In accordance with the present invention it is convenient to add the clay in the pulp suspension in an amount of from about 0.01% by mass to about 5% mass, preferably is from approximately 0.05% of the mass to approximately 2% of the mass, calculated as the ratio of dry clay to dry cellulosic suspension.

The present invention also relates to a method for producing cellulose product, such as the pulp and paper which comprises adding to a suspension of clay with the stacking of atomic planes 3R2,and, optionally, one or more drainage (dewatering) and increase the fixation of filler excipients. In a preferred embodiment, draining and improving the fixation of filler excipients contain at least one cationic polymer. In another preferred embodiment, draining and improving the fixation of filler excipients contain cationic polymer and the anionic material. Examples of usable anionic materials include anionic materials on the basis of the microparticles, for example anionic inorganic and organic particles, and an anionic organic polymers, such as anionic polymers obtained vinyl polyprionidae, such as anionic polymers based on acrylamide. It is preferable that in the method of producing paper was used clay and draining and improving the fixation of filler excipients.

The term "drainage and increase drivemode filler excipient", as it is used here, refers to a component (agent, additive, which, when added to the aqueous pulp suspension gives better drainage and/or increasing uderzhivaemoi filler than can be obtained when such a component is not added.

The term "cationic polymer", as used here, refers to an organic polymer having one or more cationic groups, preferably the overall cationic charge. The cationic polymer may also contain anionic groups, and such polymers are usually also referred to as amphoteric polymers.

Cationic polymer in accordance with the present invention can be made from natural and synthetic sources. Examples of usable cationic polymers derived from natural sources include polysaccharides, such as starches, guar gums, cellulose, chitina, chitosans, glikana, galactanes, glucans, xanthan gums, pectins, mannans, dextrins, preferably starches and guar gums. Examples of suitable starches include potato, corn, wheat, tapioca, rice, waxy maize, barley and the like. Examples suitable for use with synthetic cationic polymers include polymers obtained by reaction of chain growth, for example obtained radicaldividedbyx polymerization of polymers, such polymers based on acrylate, acrylamide and vinylamide, and polymers obtained by stepwise polymerization, for example polyurethane. Convenient to cationic polymer is selected from polysaccharides, such as starches, and the resulting radical vinyl polymerization of polymers, for example polymers based on acrylamide, and mixtures thereof.

Cationic polymer, in particular cationic polysaccharides and derived radical vinyl polymerization, the polymers may also contain aromatic groups which may be present in the main chain of the polymer or, preferably, an aromatic group can be a side groups attached to the main polymer chain or protruding from it, or be present in the side group that is attached to the main polymer chain (the main chain) or exiting it. Examples of usable aromatic groups include aryl, kalkilya and alkaline group, for example phenyl, phenylene, naphthyl, phenylene, xylylene, benzyl and phenylethyl; nitrogen-containing aromatic (aryl) groups, for example, pyridine and chinoline, as well as derivatives of these groups, preferably benzyl. Examples of usable cationic organic polymer having an aromatic group, which may be used in accordance with the present invention, include those described in the publications of International applications No. WO 99/55964, WO 99/55965, WO 99/67310 and WO 02/12626, which, thus, are included here as reference. Examples of the cation of charged groups that may be present in the cationic polymer and the monomers used to obtain the cationic polymer include Quaternary ammonium group, tertiary amino group and an acid additive salt.

The term "polymer obtained by the reaction of chain growth"as it is used here, refers to a polymer obtained by polymerization reaction of the growth of the chain, also referred to as polymer chain reaction and chain polymerization, respectively. Examples of usable cationic polymers obtained by reaction of chain growth, incorporate vinyl polyprionidae polymers obtained by polymerization of one or more monomers having a vinyl group or an ethylene-unsaturated bond, for example a polymer obtained by polymerization of a cationic monomer or mixture of monomers containing cationic monomer.

Examples of usable cationic monomers include diallyldimethylammonium halides, such as diallyldimethylammonium chloride, acid additive salts and Quaternary salts of dialkylaminoalkyl(meth)AK is elata, for example Quaternary monomers, obtained by processing dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate and dimethylaminopropyl (meth)acrylate, and dialkylaminoalkyl (meth)acrylamides, such as dimethylaminoethyl (meth)acrylamide, diethylaminoethyl (meth)acrylamide, dimethylaminopropyl (meth)acrylamide and diethylaminopropyl (meth)acrylamide, acids, for example organic and inorganic acids, alkyl halides such as methyl chloride, aryl halides, such as benzylchloride. Preferred cationic monomers include Quaternary salt dimethylaminoethylacrylate benzylchloride and Quaternary salt dimethylaminoethylmethacrylate benzyl chloride. The cationic monomer may be polymerized together with one or more nonionic and/or anionic monomers. Suitable for use copolymerizate non-ionic monomers include (meth)acrylamide; monomers on the basis of acrylamide, such N-alkyl (meth)acrylamide, N,N-dialkyl (meth)acrylamides and dialkylaminoalkyl (meth)acrylamides, the monomers on the basis of acrylates, such dialkylaminoalkyl (meth)acrylates, and vinylamide. Suitable for use copolymerizate anionic monomers include acrylic acid, methacrylic acid and different from sulphonated vinyl monomers, such as stirolsulfokisloty copolymerizate monomers include acrylamide and methacrylamide, that is, (meth)acrylamide, and cationic or amphoteric organic polymer preferably is a polymer based on acrylamide.

The mass-average molecular weight cationic polymer may vary within wide limits depending on, inter alia, on the type of polymer and it is usually equal to at least about 5000, and often at least 10000. Often, it exceeds 150000, as a rule, exceeds 500000, convenient to exceed approximately 700000, preferably higher than about 1,000,000 and most preferably exceeding about 2000000. The upper limit is not critical; it can be about 200000000, usually, 150000000, and conveniently, so that it was equal to 100000000.

Anionic inorganic materials on the basis of microparticles that can be used in accordance with the present invention include anionic particles based on silica and anionic clay type smectite. It is preferable that the anionic inorganic particles were in the colloidal range of particle sizes. Anionic particles on the basis of silicon dioxide, i.e. particles based on SiO2or silicic acid, preferably used, and such particles are normally supplied in the form of aqueous colloidal dispersions, the so-called sols. Examples of usable particles on the basis of the TLD is Kari silicon include colloidal silicon dioxide, and various types of polysilicon acid, in the form either Homo-or copolymer. Sols on the basis of silicon dioxide can be modified and can contain other elements, such as aluminum, boron, nitrogen, zirconium, gallium, titanium and the like, which may be present in the aqueous phase and/or particles on the basis of silicon dioxide. Suitable for use particles based on silica of this type include colloidal silicon dioxide, modified aluminum, and aluminum silicates. Mixtures of these are suitable for use particles on the basis of silicon dioxide may also be used. Draining and improving the fixation of filler excipients containing usable anionic particles based on silica, include those described in U.S. patents№№ 4388150, 4927498, 4954220, 4961825, 4980025, 5127994, 5176891, 5368833, 5447604, 5470435, 5543014, 5571494, 5573674, 5584966, 5603805, 5688482 and 5707493, which, thus, are included here as reference.

Convenient to anionic particles based on silica had an average particle size below about 100 nm, preferably below about 20 nm, and more preferably in the range from about 1 to about 10 nm. As usual in the chemistry of silica, the particle size refers to the average size of particles that can be aggregated or non-aggregated. Convenient to have a specific surface area of particles n the basis of silicon dioxide exceeded 50 m 2/g and preferably more than 100 m2/, As a rule, the specific surface area can reach up to about 1700 m2/g, and preferably to reach 1000 m2/g Specific surface area measured by means of titration with NaOH, a well-known method, for example, as described G.W. Sears in Analytical Chemistry 28(1956): 12, 1981-1983 and in U.S. patent No. 5176891. This area, therefore, represents an average specific surface area of particles.

In accordance with a preferred embodiment of the present invention, the anionic particles on the basis of silicon dioxide have a specific surface area ranging from 50 to 1000 m2/g, preferably from 100 to 950 m2/, Sols of particles on the basis of silicon dioxide of these types also cover modifications, for example, with any of the items listed above. Preferably, the particles based on silica are present in the ashes, having an S-value in the range from 8 to 50%, preferably from 10 to 40%, containing particles based on silica with a specific surface area ranging from 300 to 1000 m2/g, respectively, from 500 to 950 m2/g, and preferably from 750 to 950 m2/g, these sols can be modified, as described above. S-value can be measured and calculated as described Her & Dalton in J.Phys.Chem. 60(1956), 955-957. S-value indicates the degree to which gregali or the formation of microgel and a lower S-value indicates a higher degree of aggregation.

In accordance with another preferred embodiment of the present invention, the particles on the basis of silicon dioxide is selected from polysilicon acid in the form either Homo-or copolymer having a high specific surface area, respectively, greater than about 1000 m2/g Specific surface area can be in the range of from 1000 to 1700 m2/g and preferably from 1050 to 1600 m2/, Sols polysilicon acid, modified or copolymer may contain other elements, as described above. In this field polysilicon acid also referred to as polymeric silicic acid, the microgel polysilicon acid polysilicate and the polysilicate microgel, all these values are covered by the term polysilicon acid used here. Compounds containing aluminum of this type are commonly referred to as polyaluminosilicate and the microgel of polyaluminosilicate, which are both covered by the term colloidal silicon dioxide, modified aluminum and aluminum silicate used here.

In accordance with another preferred embodiment of the present invention draining and improving the fixation of filler excipient contains anionic clay type smectite. Examples suitable for use is mechanich clays include natural clay, such as montmorillonite/bentonite, hectorite, Badelt, nontronite and saponite, and synthetic clays such as smectites, such as laponite, and the like, preferably bentonite and, in particular, the bentonite, which after swelling, preferably has a surface area from 200 to 800 m2/, Usable anionic clays include those described in U.S. patent No. 4753710, 5071512 and 5607552, which, thus, are included here as reference. In addition, there may be used mixtures of anionic particles based on silica and anionic clays type of smectite.

Anionic organic polymers in accordance with the present invention contain one or more negatively charged (anionic) groups. Examples of groups that may be present in the polymer and the monomers used for obtaining the polymer, include groups bearing an anionic charge, and the acid group bearing an anionic charge when dissolved or dispersed in water, these groups are referred to here collectively as anionic groups, such as phosphate, phosphonate, sulfate group, a sulfonic acid group, sulfate group, a carboxylic acid group, carboxylate, alkoxide and phenolic groups, i.e. hydroxy-substituted finely and nattily. Group carrying anionic charge, usually presented Aut a salt of an alkali metal, alkaline-earth metal or ammonium.

Anionic organic particles that may be used in accordance with the present invention include cross stitched anionic obtained vinyl polyprionidae polymers, respectively copolymers containing anionic monomer like acrylic acid, methacrylic acid, and from sulphonated or Vospominanie obtained vinyl polyprionidae monomers, usually copolymerizable with non-ionic monomers like (meth)acrylamide, alkyl (meth)acrylates, and the like. Suitable for use anionic organic particles also contain anionic condensed polymers such as sols melamine-sulfonic acid.

Additional anionic polymers that can form part of the drainage and increase the fixation of the filler system, include anionic polymers obtained stepwise polymerization, the polymers obtained by the reaction of chain growth, polysaccharides, natural aromatic polymers and their modification. The term "step-polymer", as used here, refers to a polymer obtained speedpolymerization, also referred to as the polymer obtained stepwise polymerization,and step polymerization, respectively. Anionic organic polymers can butylaniline, branched or cross stitched. Preferably, the anionic polymer is soluble or dispersible in water. In a preferred embodiment, the anionic organic polymer also contains one or more aromatic groups. The aromatic group of the anionic polymer may be present in the main polymer chain or in the replacement group, which is attached to the main chain (the main chain of the polymer. Examples of usable aromatic groups include aryl, aracelio and albarillo group, and their derivatives, such as phenyl, tolyl, naphthyl, phenylene, xylylene, benzyl, phenylethyl, and derivatives of these groups.

Examples of usable anionic polymers obtained by the reaction of chain growth, incorporate vinyl polyprionidae polymers containing anionic monomer having a carboxylate group, such acrylic acid, methacrylic acid, ethylacrylate acid, crotonic acid, taconova acid, maleic acid, and salts of any of them, anhydrides of decislon, and from sulphonated obtained vinyl polyprionidae monomers, such as from sulphonated styrene, usually copolymerizing with nonionic monomers such as acrylamide, alkylacrylate, and the like, for example, those described in U.S. patent No. I 5185062, included here as a reference.

Examples of usable anionic aromatic polymers obtained stepwise polymerization include condensation polymers, i.e. polymers obtained step by polycondensation, for example, anionic polyurethanes and condensates of an aldehyde, such as formaldehyde, with one or more (aromatic) compounds containing one or more anionic groups, and optionally other comonomers suitable for use in polycondensation, such as urea and melamine. Examples of preferred anionic polymers obtained stepwise polymerization, in accordance with the present invention include anionic polymers based on the condensation of benzene and naphthalene, preferably polymers based on the condensation of naphthalene-sulphonic acid and naphthalene-sulfonate.

Examples of usable anionic polysaccharides include starches, guar gums, cellulose, chitina, chitosans, glikana, galactanes, glucans, xanthan gums, pectins, mannans, dextrins, preferably starches, guar gums and cellulose derivatives suitable for use starches include potato, corn, wheat, tapioca, rice, waxy maize and barley, preferably potato.

Examples of p is hodnik to use anionic organic polymers include those which are described in U.S. patent No. 4070236 and 5755930; and in the publications of International applications No. WO 95/21295, WO 95/21296, WO 99/67310, WO 00/49227 and WO 02/12626, which are incorporated herein as references.

The mass-average molecular weight anionic polymer having aromatic groups may vary within wide limits depending on, inter alia, on the type of polymer and it is usually equal to at least about 500, respectively, greater than about 2000, and preferably greater than about 5000. The upper limit is not critical; it can be about 200000000, usually about 150000000, respectively, approximately 100000000, and preferably about 10000000.

In addition to the above cationic polymers, anionic inorganic and organic particles and anionic organic polymers, draining and improving the fixation of filler excipient may also contain low molecular weight, high cationic charge, organic polymers and/or inorganic compounds of aluminum.

In accordance with one of preferred embodiments of the present invention draining and improving the fixation of filler excipient contains a cationic polymer and anionic inorganic material of the microparticles, respectively, anionic particles on the basis of duoci the silicon or anionic clay type smectite. In accordance with another preferred embodiment of the present invention draining and improving the fixation of filler excipient contains a cationic polymer and anionic obtained vinyl polyprionidae polymer, respectively, anionic polymer based on acrylamide. In accordance with another preferred embodiment of the present invention draining and improving the fixation of filler excipient contains a cationic polymer containing an aromatic group. In accordance with another preferred embodiment of the present invention draining and improving the fixation of filler excipient contains a cationic polymer containing an aromatic group and an anionic polymer containing aromatic groups.

Components draining and improving the fixation of filler excipients may be added to the pulp suspension in the usual manner and in any order. When using anionic material of the microparticles, it is preferable to add the cationic polymer in suspension before adding the material of the microparticles, even if can be used in reverse order, add. In addition, it is preferred addition of cationic polim the RA before stage shear processing, which can be selected from pumping, mixing, cleaning and the like, and adding anionic compounds after this stage, the shear processing. When using LMW (low molecular weight) cationic organic polymer and/or a compound of aluminum, such components are preferably introduced into the suspension before the introduction of the cationic polymer and the anionic component, if it is used. Alternatively, the LMW cationic organic polymer and the cationic polymer may be introduced into the suspension essentially simultaneously, either separately or in mixture, for example as described in U.S. patent No. 5858174, which is incorporated herein by reference.

If the clay is in accordance with the present invention is used in conjunction with drainage and increase the fixation of the auxiliary filler substance, the clay can be added to the suspension before or after adding drainage and increase the fixation of filler excipients. However, it is preferable that the cationic clay was added before adding drainage and increase the fixation of filler excipients and other chemicals to maintain performance. Conveniently, that clay was added to the oily paper weight or thin paper pulp, and draining and improving the fixation of filler VSP the service substance was added to thin the paper pulp. Clay may also be added to recycled circulating water. If there are two or more draining and improving the fixation of filler excipients, i.e. cationic polymer with an anionic material, for example particles based on silica or anionic organic polymer, the clay can be added to the pulp slurry (paper weight) before, after or between additions draining and improving the fixation of filler excipients or together with any of draining and improving the fixation of filler excipients. Clay can also be added in several positions in the way that, for example, to bold a paper weight and, again, to thin paper pulp, before adding drainage and increase the fixation of filler excipients.

Draining and improving the fixation of the auxiliary filler substance (substances) in accordance with the present invention may be added to paper pulp, which must be dehydrated, in amounts which can vary within wide limits depending on, inter alia, on the type and number of components, type of pulp suspensions, salt content, type of salts, filler content, type of filler, point to add, the degree of closeness of working in the water, and the like. Generally, increasing the fixation of filling and draining the auxiliary substance (substance) is added in amounts which give better drainage and/or retention than is obtained without the addition of these components. The cationic polymer is usually added in the amount of at least about 0.001% is mass, often at least about 0.005% of the mass relative to the dry pulp suspension and the upper limit is usually equal to about 3%, and respectively, about 1.5% of the mass. Usually used when adding the amount of cationic polymer is from about 0.01% to about 0.5% of the mass. Anionic materials, for example, anionic particles based on silica, anionic clay type smectite and anionic organic polymers are typically added in amounts of at least about 0.001% is mass, often at least about 0.005% of the mass relative to the dry pulp suspension, and the upper limit is usually equal to approximately 1.0% and, respectively, approximately 0.6% of the mass.

When the method is used LMW cationic organic polymers, they can be added in a quantity of at least about 0.001% is mass, relative to the dry pulp suspension. Convenient that this number was in the range of from about 0.07 to about 0.5%, preferably, within the range from about 0.1 to about 0.35 percent. When the method is used a compound of aluminum, the total number entered in the pulp, which must be dehydrated, depends on the type of aluminum compounds and other effects desired from it. For example, in this area is well known the use of aluminum compounds as the precipitating agents for sizing based on rosin. The total added amount is usually at least about 0.05% of the mass, calculated as the number of Al2O3with respect to the dry pulp suspension. Convenient that this number was in the range of from about 0.5 to about 3.0%, preferably in the range from about 0.1 to about 2.0 percent.

Additional additives which are conventional in the manufacture of paper, can of course be used in combination with additives (additives) in accordance with the present invention, such as hardening agents for dry material, hardening agents for wet material, agents, optical bleaching, colouring agents, agents for sizing, such agents for sizing based on rosin, and agents for sizing, interacting with cellulose, such as a ketene dimer and succinic anhydrides, and the like. The pulp slurry or paper pulp can also contain mineral on omnitele common types, such as kaolin, China clay, titanium dioxide, gypsum, talc and natural and synthetic calcium carbonates such as chalk, ground marble and precipitated calcium carbonate.

Furthermore, the method can also be useful in the production of paper from pulp suspensions having a high conductivity. In such cases, the conductivity of the suspension, which is dehydrated on the net, usually equal to at least 1.0 MS/cm, respectively, at least 2.0 MS/cm, and preferably at least 3.5 MS/see Conductivity can be measured using standard equipment, such as a tool WTW LF 539 shipped Christian Berner. The values mentioned above conveniently be determined by measuring the conductivity of the pulp suspension which is introduced into the headbox of the papermakingmachine, or present, or, alternatively, by measuring the conductivity of the circulating water obtained from dewatering of the suspension.

The present invention also covers the process of making paper, where reclaimed water is widely recycled or recycled, i.e. with a high degree of isolation of circulating water, for example, where it is used from 0 to 30 tons of fresh water to produce one ton of dry paper, usually less than 20, respectively, less than 15, preferably less than 1, and even better, if less than 5 tons of fresh water per tonne of paper.

The present invention is additionally illustrated in the following examples, which, however, is not intended to be limiting thereof. Share and % are the mass fractions and % mass, respectively, unless otherwise specified.

Example 1

Clay Al-Mg having the stacking of atomic planes 3R2(CC-14, Akzo Nobel Catalyst B.V.), compared with the commercial talc (Finntalc P05 from Omya), from the viewpoint of adsorption resin. A method of evaluating the adsorption resin for mineral powder is a procedure D.A. Hughes in Tappi (July 1977, vol.60, No. 7, p. 144-146). First samples of synthetic resin is prepared by adding potassium hydroxide (1M) to a mixture of 0.65 g of infolevel resin and 0.35 g of oleic acid until then, until the saponification. Then add the denatured ethanol to dissolve the synthetic resin.

Procedure to study the adsorption resin: first 35 ml of distilled water is added in a glass centrifuge tube, followed by adding 1 ml of a solution of synthetic resin and 10 ml of the clay with the stacking of atomic planes 3R2(the content of the dry product of 2.5%). the pH of the suspension of synthetic resin with sulfuric acid was adjusted to 6.5. The mixture is then stirred for 2 minutes and centrifuged for 20 minutes at 4500 rpm After this is the second supernatant is drained and release, and the tube is dried overnight at 60°C. After drying in a test tube add 10 ml of reagent chloroform-acetic anhydride (1:1) and stirred to release the adsorbed resin. Then the test tube is centrifuged for 20 minutes, resulting in a transparent reagent remains in the upper part of the tube. Thereafter, the reactant was poured into a small chemical beaker and add 10 drops of concentrated sulfuric acid. After passing 4 minutes the liquid is measured in installation spectrophotometer UV-visible light at 400 nm, while the value of the absorption coefficient are compared with the values of the absorption coefficient of known quantities of resin. A similar study carried out for the sample Finntalc P05. The results of adsorption resins are given in table 1, in which Adding resin" refers to the amount of resin in mg added per gram of adsorbent; talc or clay, and "Adsorption resin" refers to the amount of resin in mg adsorbed per gram of adsorbent, talc or clay.

Table 1
No. studiesAdding resin [mg/g]Adsorption resin [mg/g]
Talc

[0.16 mg/ml]
Clay (CC-14)

[0.16 mg/ml]
Talc

[0.08 mg/ml]
Clay (CC-14) [0.08 mg/ml]
100000
221,221,22
342,341,24
46361,56
583,17,51,68
61049210
7124,3102,111,5
8144,2the 10.12,213
9164,5the 10.1213
1018the 4.7112,413

As shown in table 1, the clay, with the stacking of atomic planes 3R2has better adsorption compared to talc.

Example 2

In this example, the characteristics of the adsorption of the cationic resin clay Al-Mg having laying atomic PLO the bones 3R 1(CC-8, Sued Chemie), compared with cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-17, Akzo Nobel Catalyst B.V.).

Prepare two mixtures of synthetic resin, one of them contains oleic acid and infolevel resin (Resin No. 1) of example 1, and the other is a mixture of synthetic resins containing abietic acid. The resin containing abietic acid (Resin No. 2), is prepared by mixing 1 g of abietic acid and 1M potassium hydroxide until then, until the saponification. For dissolving the synthetic resin add denatured ethanol (250 ml). Use the same procedure to study the adsorption resin, as shown in example 1. The results are given in tables 2 and 3.

Table 2
No. studiesAdding resin

(Resin No. 1) [mg/g]
Adsorption resin [mg/g]
CC-8 (3R1)CC-17 (3R2)
1000
28of 5.47,1
316for 9.6414,1
432a 21.529
5 4834,441

Table 3
No. studiesAdding resin

(Resin No. 2) [mg/g]
Adsorption resin [mg/g]
CC-8 (3R1)CC-17 (3R2)
1000
28of 4.456,07
31611,113,8
43226,530,3
548of 40.347,5

As shown by tables 2 and 3, the clay with the stacking of atomic planes 3R2absorbs a mixture of abietic acid and infolevel resin, as well as oleic acid, to a much higher extent than cationic clay, with stacking of atomic planes 3R1.

Example 3

The adsorption of sticky substances (thermoplastics) cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-14, Akzo Nobel Catalyst B.V.), compared with talc (Finntalc P05, Omya) using the tool (TOC Dohrman DC190). TOC (total organic carbon) is determined by burning at 800°C, the carbon OK slaets to carbon dioxide, and then analyzed by the method of IR-spectroscopy. The results are given in table 4, in which the "Add sticky substances" refers to the number of sticky substances in mg added per gram of adsorbent; clay or talc, and "Adsorption sticky substances" refers to the number of sticky substances in mg adsorbed per gram of adsorbent; talc or clay.

Table 4
No researchAdd sticky substances [mg/g]Adsorption sticky substances [mg/g]
Talc

[0.16 mg/ml]

thermoplastic
CC-14

[0.16 mg/ml] thermoplastic
Talc

[0.08 mg/ml] thermoplastic
CC-14

[0.08 mg/ml] thermoplastic
100000
221,321,52
341,841,84

Example 4

The performance of the drainage through the inclusion of clay, with the stacking of atomic planes 3R2in the drying and improves the fixation of the functional filler is Chairman substance evaluated by a Dynamic Drainage Analyzer (DDA), available from Akribi Kemikonsulter AB, Sweden, which measures the drainage time of a given volume of paper pulp through the mesh, when you remove the cloth and application of vacuum (0.35 bar) to the side of the grid, which is opposite the side on which the present paper weight. Holding the first passage is measured by turbidity meter, by measuring the turbidity of the filtrate, recycled water obtained by dewatering the suspension.

Your composition is based on the bleached fibrous mass from the paper mill for the production of newsprint, having a consistency of 30 g/l, conductivity of about 1500 µs/cm and pH 7. In the suspension of pulp add sample cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-9, Akzo Nobel Catalyst B.V.). Then the composition is mixed with a magnetic stirrer, and retention time/contact paper pulp and cationic clay ranges from 30 minutes to 1 hour. After that, before conducting the research using DDA, the composition is diluted with water (approximately 1:10).

Samples of paper pulp/composition is placed in the tray DDA with blades at time 0. After that add increasing fixation of filling/dewatering chemicals in the following order: (i) after 15 seconds, 0.8 kg/ton dry fiber weight of polyacrylamide (Eka PL 1510), (ii) the school for 15 seconds (30 seconds after the start), 0.4 kg/ton dry fiber weight of anionic particles on the basis of silicon dioxide (Eka NP 780), (iii) after another 15 seconds, draining the suspension, while automatically recording the time of drainage.

Samples of the filtrate from studies of drainage appreciate relative to the adsorption resin. Adsorption, as expected, correlated with the absorbance of the filtrate at 280 nm in a spectrophotometer UV-visible light and the decrease of the absorption coefficient in the UV-visible region is referred to as reducing the number of resin. The results are presented in table 5.

Table 5
No. studiesAdd CC-9 [kg/t]The drainage time [with]Reducing the number of resin [%]
109,3-
256,0419,8
3105,6321,4

Table 5 clearly shows that the addition of CC-9 in suspension reduces the time of drainage and that the filtrate contains less resin, when in suspension add CC-9.

Example 5

In this example, cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-12), compared with cationic clays is th Al-Mg, with the stacking of atomic planes 3R2(CC-18), in relation to drainage. Use the same composition and procedure as described in example 4. Table 6 gives the results.

Table 6
No. studiesDosage CC [kg/t]The drainage time [with]
CC-12 (3R1)CC-18 (3R2)
1016,216,2
221513,1
3514,913,2
41014,811,9

From table 6 it is clear that the addition of clay, with the stacking of atomic planes 3R2additionally improves drainage in comparison with the cationic clay, with stacking of atomic planes 3R1.

Example 6

Here we evaluate the impact on the draining effect of cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22). Use the same composition and procedure as described in example 4, except that use other drainage and increase the fixation of filler excipients. This note is d, 0.4 kg/t of dry fiber mass Percol 63 (cationic polyacrylamide from CIBA) and 2 kg/t of dry fiber mass Hydrocol SW (clay bentonite compounds, preventing the type of smectite from CIBA) is added in the same way.

Table 7
Dosage CC [kg/t]The drainage time [with]
CC-22 (3R2)
011,2
29,1
108,1

Table 7 shows that the performance of dehydrating and increase the fixation of filler excipients containing additive cationic PAM and bentonite compounds, preventing the clay in suspension, improved by adding a cationic clay Al-Mg type 3R2.

Example 7

Adsorption sticky substances other materials cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-17, Akzo Nobel Catalyst B.V.), is evaluated and compared with talc (Finntalc P05, Omya). Sticky substances self-adhesive materials are compositions of office waste in the form of stickers, adhesive tapes, samanalawewa envelopes and labels Post-it®.

60 g of labels Post-it®having one side covered with an adhesive (Tappi journal vol. 79 no 7 July 1996), cut into small the squares and impregnated with 1.5 liters of cold tap water for 24 hours 0.5 l of salt solution containing CaCl2·2H2O, Na2SO4·10H2O and tap water, add in the mixture of water-paper simulation of the paper mill, such as pH and conductivity. Then loosen the mixture in a standard baking powder fibrous mass at 30,000 rpm. Fibers and fine particles greater than 25 microns are removed by filtration. The filtrate is heated on a water bath to 60°C. the pH varies between the 6.8 and 7.4. To samples of the filtrate add clay Al-Mg having the stacking of atomic planes 3R2and talc (PO5). After adding CC-17 and talc filtrate is stirred with a magnetic stirrer, and the retention time of CC-17 and talc is 60 minutes, the adsorption is carried out by centrifugation for 30 min at 4500 rpm and Then the supernatant is poured and measured TOC. Table 8 shows the results of adsorption of the adhesive materials.

tr>
Table 8
No. studiesTalc [kg/t]CC-17 [kg/t]TOC [mind]
100550
25525
310498
420400
55401
610292
720115

As shown by table 8, the adsorption of the adhesive materials are significantly improved when adding CC-17, compared with talc.

Example 8

In this example evaluated the performance of the ring. The composition from the paper mill for the production of cardboard packaging process liquid cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22, Akzo Nobel Catalyst B.V.), and talc (Finntalc P05, Omya), respectively. Add chemicals for sizing and improve uderzhivaemoi filler and manufactured manually sheets (SCAN-C 26:76). The sizing of the sheets is measured as values Cobb 60 (SCAN-P 12:64).

Your composition is a fatty pulp from factory LPB containing bleached fibrous mass of soft and hard wood. This song is stirred and heated to 50°C. Add the chemicals and process the composition within 30 minutes. Then fatty pulp is diluted with tap water to a consistency of 5 g/L. This composition has a pH of 8 and a conductivity of 0.7 MS/see Paragraph is ed manufacturer of sheet add 0.3 kg/t of dry fiber mass AKD (Keydime C223, Eka Chemical), 8 kg/t of dry fiber weight of cationic starch (Perlbond 970) and 0.5 kg/t of dry fiber weight of particles based on silica (Eka NP 590, EkaChemical). The leaves have a bulk density of approximately 73 g/m2. Table 9 shows the results of sizing obtained by adding different amounts of talc and CC-22 to liquid compositions for packaging Board.

Table 9
No. studiesTalc [kg/t]CC-22 [kg/t]Cobb 60
10040
2144
3560
4135
5534

Performance sizing improved when using CC-22, compared with talc.

Example 9

Performance sizing evaluated at higher additions of cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22, Akzo Nobel Catalyst B.V.) and talc (Finntalc P05, Omya), respectively. Manufactured manually sheets, and measure the sizing as Cobb 60 (SCAN-P 12:64).

COI is lizama composition is a fatty pulp from factory LPB, containing bleached with hydrogen peroxide sulphate fibrous mass of soft and hard wood with consistency ˜4%. This song is stirred and heated to 50°C. Add the cationic clay or talc composition and process for 20 minutes. Then fatty pulp is diluted bleaching filtrate to the consistency of ˜3,9 g/l of the composition for the AKD add 1.6 kg/t kanifolnogomaterial for sizing, 1.6 kg/t of aluminum oxide, 5,0 kg/t of cationic starch and 0.35 kg/t of particles on the basis of silicon dioxide (Eka NP 590, EkaChemical)prior to printing the sheets manually (forming device Rapid-are Kothen). The leaves have a volumetric weight of approximately 100 g/m2. Table 10 gives the results of a ring obtained by sizing liquid compositions for packaging Board.

Table 10
No. studiesAKD [kg/t]Talc [kg/t]CC-22 [kg/t]Cobb 60
1000258
20,500250
30,800131
410 059
51,40039
60,550211
70,850115
81`5061
91,45039
100,5010198
110,801087
12101045
131,401033

Table 10 shows that when using CC-22 performance sizing improved (lower values Cobb 60) compared to talc.

Example 10

This example is carried out at a paper mill. Chemical fibrous mass from the headbox for dewatering machine for fibrous mass is treated with cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22, Akzo Nobel Catalyst B.V.). Then measure the turbidity of the filtrate fibrous mass, see table 11.

Used fibrous mass of t is made by a suspension of bleached eucalyptus with consistency ˜ 1,2%. This fibrous mass is stirred and heated at 60°C. Add the cationic clay and fibrous mass is treated within 30 minutes. Then the fiber is filtered through Britt-Jar with mesh 200 mesh (hole diameters the 76.2 microns). The filtrate is analyzed for turbidity the turbidity meter Hach 2100P. Table 11 shows the results in terms of the turbidity of the filtrate.

Table 11
No. studiesCC-22 [kg/t]Turbidity [NTU values (units turbidity)]
1053
2243
3523

The turbidity of the filtrate improves (decreases) in the processing of chemical fiber and pulp CC-22.

Example 11

This example is carried out at a paper mill for the production of TMP. Thermomechanical fibrous pulp (TMP) dehydrate or washed after bleaching with hydrogen peroxide. The filtrate is often referred to as bleached filtrate. Water bleached TMP filtrate is stirred and heated at 50°C. Water bleached TMP filtrate is treated for 30 minutes cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22, Akzo Nobel Catalyst B.V.). This water is centrifuged and transparent the phase is measured for turbidity analysis on the adsorption of the spectrophotometer Lasa 10 at a wavelength of 700 nm. Table 12 shows the results.

Table 12
No. studiesCC-22 [kg/t]Absorption [700 nm]
100,506
2100,377

The absorption in the transparent phase improves (decreases) in the processing water after blanching TMP CC-22.

Example 12

This example is carried out in a paper mill for the production of bleached fibrous pulp (DIP). The fibrous mass from DIP treated cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22, Akzo Nobel Catalyst B.V.). Then measure the turbidity of the filtrate fibrous mass, see table 13.

Used fibrous mass is taken between stagesdisc filter and screw press in the DIP. The fibrous mass has the consistency ˜7% and is diluted with tap water to ˜4.2 per cent. This fibrous mass is stirred and heated at 50°C. Add the clay and treated fibrous mass within 30 minutes. Then the fiber is filtered through glass fiber filter GF/A (hole diameter ˜2 μm). The filtrate is analyzed for turbidity the turbidity meter Hach 2100P. Table 13 shows the results.

Table 13
No. studiesCC-22 [kg/t]Turbidity [NTU]
1071,8
2263,5
3542,3

The turbidity of the filtrate improves (decreases) with stirring before being filtered bleached fibrous mass with CC-22.

Example 13

Fiber weight of the paper mill for the production of bleached fibrous pulp (DIP) is treated with cationic clay Al-Mg having the stacking of atomic planes 3R2(CC-22, Akzo Nobel Catalyst B.V.), in a manner similar to example 12. Then measure the turbidity of the filtrate fibrous mass and the results in table 14.

Table 14
ResearchCC-22 [kg/t]Turbidity [NTU]
1018
2515
31011

The turbidity of the filtrate improves (decreases) when processing before being filtered bleached fibrous mass by adding thereto CC-22.

1. Cellulosic product containing clay, with the laying of a nuclear submarine is scosta 3R 2.

2. The product according to claim 1, in which the paper product is a paper.

3. Product of claim 1, wherein the cellulosic product is a fibrous mass.

4. Product according to any one of claims 1 to 3, in which the clay is cationic.

5. Product according to any one of claims 1 to 3, wherein the clay contains layers and interlayer space, these interlayer space contains anions, and these layers contain divalent and trivalent metal atoms in such relation that the total charge of these layers is cationic.

6. Product according to any one of claims 1 to 3, wherein the clay contains a divalent metal atom (M2+), which represents magnesium, and trivalent metal ion (M3+), which represents aluminum.

7. The product according to claim 5, in which the anions that may be present in the interlayer space, include the NO3-HE-, Cl-, Br-I-, CO32-, SO42-, SiO32-, CrO42-IN32-, MnO4-, HGaO32-, HVO4-and ClO4-, columnar anions or anions include, carboxylates, sulfonates.

8. The product according to claim 5, in which the anions that may be present in the interlayer space, include the hydroxide, carbonate.

<> 9. Product according to any one of claims 1 to 3, in which the clay is characterized by a General formula

[Mm2+Mn3+(OH)2m+2n]Xn/zZ-·bH2Oh,

where m and n are, independently from each other, are integers having a value such that m/n is in the range from 1 to 10; b is an integer having a value ranging from 0 to 10; z is an integer from 1 to 10, Xn/zZ-represents an anion, where z is an integer from 1 to 10; M2+represents a divalent metal atom, which is Be, Mg, Cu, Ni, Co, Zn, Fe, Mn, Cd, and CA; M3+represents a trivalent metal atom, which is Al, Ga, Ni, Co, Fe, Mn, Cr, V, Ti, In.

10. Product according to any one of claims 1 to 3, in which the clay is hydrotalcite, manasseite, pyroaurite, serenit, static, Barberton, takovite, reevesite, desautels, motukoreaite, vermland, Meixner, Coalinga, chloromelanite, karaboga, honest, woodwardite, iowait, hidrogenesse, mounkaila.

11. Product according to any one of claims 1 to 3, in which the clay is hydrotalcite.

12. A method of obtaining a cellulose product, including

(i) obtaining aqueous suspension containing cellulosic fibers and optional filler;

(ii) adding to the suspension of clay with the stacking of atomic planes 3R 2; and

(iii) dewatering the obtained suspension.

13. The method according to item 12, in which the paper product is a paper.

14. The method according to item 12, in which he includes in addition to adding to the suspension one or more drainage and increase the fixation of auxiliary substances.

15. The method according to 14, in which the draining and improving the fixation excipients contain cationic polymer and the anionic material.

16. The method according to 14, in which the draining and improving the fixation excipients contain cationic polymer and anionic particles based on silica.

17. The method according to 14, in which the draining and improving the fixation excipients contain cationic polymer and anionic particles on the basis of silicon dioxide having a specific surface area above 100 m2/year

18. The method according to 14, in which the draining and improving the fixation excipients contain cationic polymer and bentonite.

19. The method according to 14, in which the cationic polymer is a cationic starch or cationic polymer based on acrylamide.

20. The method according to item 12, in which the clay is added in the amount of at least 0.01 wt.%, calculated as the ratio of dry clay to dry cellulosic suspension.

21. Method of producing cellulose is about product, including

(i) obtaining aqueous suspension containing pulp fibers;

(ii) adding to the suspension a cationic clay, and then one or more draining and improving the fixation of auxiliary substances containing at least one cationic polymer; and

(iii) dewatering the obtained suspension.

22. The method according to item 21, in which the clay is hydrotalcite, manasseite, pyroaurite, serenit, static, Barberton, takovite, reevesite, desautels, motukoreaite, vermland, Meixner, Coalinga, chloromelanite, karaboga, honest, woodwardite, iowait, hidrogenesse, mounkaila.

23. The method according to item 21, in which the clay is hydrotalcite.

24. The method according to item 21, in which the cationic polymer is a cationic starch or cationic polymer based on acrylamide.

25. The method according to item 21, in which the draining and improving the fixation excipients contain one cationic polymer and the anionic material.

26. The method according to item 21, in which the draining and improving the fixation excipients contain cationic polymer and anionic particles based on silica.

27. The method according to item 21, in which the draining and improving the fixation excipients contain cationic polymer and bentonite.



 

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EFFECT: reduced power of the drying section of the machine for manufacture of paper or board and provided reduction of investments and reduction of the length of the paper-making line.

9 cl

FIELD: method for inner sizing of cardboard for packing of liquid products, water-repellent adhesive substance for inner sizing, cardboard for packing of liquid products, package for liquid products and use of adhesive substance for inner sizing.

SUBSTANCE: the adhesive substance for inner sizing includes the derivative of oxytanon of formula (1), typically 2-oxytanon of formula (II). Formulae (I), (II) are given in the invention description. In the derivative of oxytanon of formula (I) n has the value from 0 to 6. In formulas (I) and (II) R represents hydrogen or linear hydrocarbon chain, and R`, R``, R``` represent hydrocarbon chains: R` and R`` are mainly obtained from non-branched linear fatty acids, R```-linear or branched alcyl chain or acyclic alcyl chain.

EFFECT: provided improved method for inner sizing of cardboard for packing of liquid products, improved cardboard for packing of liquid products, package for liquid products manufactured from such a cardboard.

21 cl, 3 tbl

FIELD: pulp-and-paper industry, in particular, sizing of paper with the use of aqueous composition.

SUBSTANCE: method involves producing aqueous composition of cellulose filaments and dehydrating paper web; adding aqueous composition to cellulose suspension, said aqueous composition comprising sizing substance aggregates; producing aqueous composition by mixing in any order before adding into aqueous suspension of aqueous solution containing at least one coagulant and aqueous dispersion containing sizing substance. Zeta-potential of composition is below 20 mV.

EFFECT: increased efficiency and simplified method.

26 cl, 5 tbl, 3 ex

FIELD: gluing and sizing compositions.

SUBSTANCE: invention relates to the essentially anhydrous sizing composition and an aqueous sizing composition used in sizing paper and cardboard. Essentially anhydrous and an aqueous sizing compositions comprise gluing substance, non-ionogenic surface-active substance, an anionic surface-active substance and a monohydric alcohol. Method for preparing an aqueous composition involves homogenization of gluing substance in the presence of surface-active substances and monohydric alcohol. Invention provides preparing sizing compositions that can be homogenized easily, i. e. they represent dispersions or emulsions formed by application of insignificant shearing forces, for example, such as stirring and provides preparing sizing compositions that are stable in storage.

EFFECT: improved preparing method, improved and valuable properties of compositions.

15 cl, 6 tbl, 3 ex

Sizing composition // 2258727

FIELD: stabilized dispersions.

SUBSTANCE: invention relates to emulsification and colloidal stabilization of emulsions and dispersions of hydrophobic phases in aqueous phases using a coacervate. In particular, stable emulsified or dispersed composition of invention, including hydrophobic and aqueous phases, is stabilized by cationic colloidal coacervate stabilizer including anionic and cationic components in a proportion ensuring zeta potential of the composition to be at least 20 mV. Preferred hydrophobic phase is non-colophony reactive or non-reactive sizing substance, although employment of coacervate allows stable emulsions or dispersions of mixtures of colophony and non-colophony sizing substances to be obtained. Furthermore, methods of obtaining and using stable emulsions or dispersions as well as sized paper made using emulsified or dispersed coacervate-stabilized sizing substance are described.

EFFECT: enhanced stabilization of emulsions and dispersions.

139 cl, 1 dwg, 3 tbl, 16 ex

FIELD: mining industry and mechanical engineering.

SUBSTANCE: the invention is dealt with methods of production of a paper, in particular, with its smoothing. The water suspension containing cellulose fibers and optional fillers (i) add the sizing dispersion containing a sizing agent and a polymer including one or several aromatic groups and (ii) a sizing promoter containing a polymer intercalating one or several aromatic groups. Mould and dry the produced suspension. The sizing dispersion and sizing promoter are added to the water suspension separately. The invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.

EFFECT: the invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.

41 cl, 6 tbl, 6 ex

The invention relates to the technology of making paper lichtovannaya

The invention relates to the production of compositions for paper sizing and can be used in the paper industry

FIELD: pulp-and-paper industry, in particular, manufacture of paper and cardboard.

SUBSTANCE: method involves preparing aqueous cellulose pulp; adding holding system into cellulose pulp system; draining pulp through cloth for forming of paper web; drying resultant paper web. Holding system comprises swelling clay having whiteness of at least 70.

EFFECT: increased whiteness of paper and improved filler retention capability.

16 cl, 1 tbl, 20 ex

FIELD: pulp-and-paper industry, in particular paper or board production.

SUBSTANCE: claimed method includes providing of slurry containing cellulose fiber and at least sizing agent interacting with cellulose. Sizing agent is selected from group containing ketene dimmers and acid anhydrides. Cationic vinyl polymer obtained by additional polymerization, containing aromatic units and anionic vinyl polymer obtained by additional polymerization and having molecular mass from 6000-100000 are introduced into slurry. Then obtained slurry is dehydrated and paper leaf is formed.

EFFECT: increased effectiveness of sizing, dehydration and retention.

11 cl, 3 tbl, 2 ex

FIELD: polymers.

SUBSTANCE: claimed method includes polymerization of one or more water soluble monomers in aqueous salt solution in presence of polymer dispersant, wherein polymer dispersant represents copolymer of monomer (M) mixture containing at least one cationic monomer and at least one monomer, such as tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate or monomer of general formula I wherein R1 is hydrogen or methyl; R2 is hydrogen or C1-C2-alkyl; R3 is hydrogen, C1-C4-alkyl, phenyl or benzyl; n = 1-4; x = 1-50, and monomer (M) mixture essentially having no water insoluble monomers; and/or polymer dispersant may be obtained by monomer (M) mixture polymerization in reaction mixture essentially having no organic solvents. Also disclosed are aqueous polymer dispersion and application thereof as retention agent in paper production, as thickening agent or agent for soil amelioration. Method for paper production from aqueous suspension includes addition of abovementioned polymer dispersion.

EFFECT: polymer dispersion of high stability, high active substance content, low cationic charge, and good retention characteristics.

FIELD: paper industry.

SUBSTANCE: aqueous composition includes 0.01 to 45 % by weight of anionic organic polymeric particles and silica-based colloidal anionic particles at weight ratio between them from 20:1 to 1:50. Silica-based colloidal anionic particles are prepared by modifying silica with aluminum or amine. Anionic organic polymeric particles are prepared by polymerization of ethylenically-unsaturated monomers with multifunctional ramification agents and/or multifunctional cross-linking agents. Composition is prepared by combining the two types of particles. Papermaking method comprises adding above-prepared composition to pulp composed of cationic polymer fibers.

EFFECT: imp drying and retention properties of aqueous composition.

16 cl, 4 tbl, 4 ex

FIELD: polymer materials and papermaking industry.

SUBSTANCE: invention relates to aqueous silicon-containing composition containing anionic organic polymer comprising at least one aromatic group and silica-based anionic particles in aggregated form or microgel form. Anionic organic polymer, in particular, contains at least one aromatic group and silica-based anionic particles in amount at least 0.01% of the total mass of composition. Composition contains essentially no sizing substance capable of reacting with cellulose, whereas anionic organic polymer containing at least one aromatic group is not naphthalenesulfonate-formaldehyde condensate. Invention also relates to methods for preparing the composition and to utilization thereof as a substance providing dehydration and retention in paper making process. Invention further relates to a paper making process using aqueous suspension containing cellulose fibers and optionally filler, wherein aqueous silicon-containing composition and at least one charged organic polymer are added to pulp.

EFFECT: improved dehydration and/or retention in paper making process and increased storage stability.

20 cl, 4 tbl, 4 ex

FIELD: pulp-and-paper industry, in particular, sizing of paper with the use of aqueous composition.

SUBSTANCE: method involves producing aqueous composition of cellulose filaments and dehydrating paper web; adding aqueous composition to cellulose suspension, said aqueous composition comprising sizing substance aggregates; producing aqueous composition by mixing in any order before adding into aqueous suspension of aqueous solution containing at least one coagulant and aqueous dispersion containing sizing substance. Zeta-potential of composition is below 20 mV.

EFFECT: increased efficiency and simplified method.

26 cl, 5 tbl, 3 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: process of manufacturing cellulose products such as paper articles is accomplished by simultaneously or continuously adding at least one aluminum compound and at least one water-soluble silicate, in particular at least one product of reaction of monovalent cation silicate with bivalent metal ions, to fluid cellulose pulp such as paper pulp. Compositions are also described comprising at least one aluminum compound and at least one water-soluble metal silicate and cellulose products including at least one water-soluble metal silicate complex.

EFFECT: improved retention and drainage allowing manufacture of high-quality cellulose products.

25 cl, 6 tbl, 27 ex

FIELD: inorganic chemistry.

SUBSTANCE: invention relates to composition containing water-soluble silicate complex of general formula (1-y)M2O*yM'O*xSiO2, wherein M is monovalent cation; M' - bivalent cation; x = 2-4; y = 0.005-0.4; y = 0.001-0.25. Method for production of said composition includes mixing of silicates with monovalent and bivalent cations.

EFFECT: composition useful in production of cellulose sheet.

23 cl, 17 ex, 18 tbl

The invention relates to aqueous sols on the basis of silicon dioxide, a process for the production of sols on the basis of silicon dioxide and methods of producing paper that sols are used as additives

The invention relates to water solu containing particles on the basis of silicon dioxide, to a method for producing particles on the basis of silicon dioxide and a method for producing paper

FIELD: paper industry.

SUBSTANCE: aqueous composition includes 0.01 to 45 % by weight of anionic organic polymeric particles and silica-based colloidal anionic particles at weight ratio between them from 20:1 to 1:50. Silica-based colloidal anionic particles are prepared by modifying silica with aluminum or amine. Anionic organic polymeric particles are prepared by polymerization of ethylenically-unsaturated monomers with multifunctional ramification agents and/or multifunctional cross-linking agents. Composition is prepared by combining the two types of particles. Papermaking method comprises adding above-prepared composition to pulp composed of cationic polymer fibers.

EFFECT: imp drying and retention properties of aqueous composition.

16 cl, 4 tbl, 4 ex

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