Pulping cellulose-containing materials (D21C3)

D   Textiles; paper(37756)
D21C3                 Pulping cellulose-containing materials (digesters d21c0007000000)(643)
Chemical method of pulp cooking // 2642417
FIELD: chemistry.SUBSTANCE: caustic soda is substituted with cheap lime and complexing, flocculation and acid-base neutralisation of aluminium sulphate are additionally used, the useful ingredients contained in black liquor are reused, output close to the yield of pulp is achieved, high-quality pulp is produced, cyclical utilisation of black liquor is carried out, and the problem of its pollution is solved.EFFECT: highly effective pulp production.10 cl

Continuous method of manufacturing pulp from herbaceous plant material // 2636556
FIELD: chemistry.SUBSTANCE: method consists of the following stages: preparation of an herbaceous plant material by grinding, dust removal, continuous cooking, dispersion, dilution of pulp, sorting and fractionation, removal of black liquor concentration, dilution of fresh water, getting the finished pulp suitable for the manufacture of paper or sheets of cellulose, and, optionally, bleaching paper pulp. Continuous cooking takes place in a vertical column at a temperature of 70-100°C for 40 minutes to 2 hours; as a result, a cooking suspension of the following composition is formed (on average): a weight percentage of NaOH 0.9-1.5; a weight percentage of NaCl or Na2SO3 0.15-0.4, and a weight percentage of herbaceous plant materials 15-18; where the concentration of ingredients is calculated from the weight of the liquid phase. The preferred herbaceous material for this method is miscanthus (Miscanthus x giganteus, Andersson).EFFECT: after sorting and fractionation, two fractions are formed, one of which then passes the grinding process, and the other is processed into finished pulp with or without bleaching.9 cl, 1 tbl, 2 dwg

ethod for producing black liquor and method for producing liquid flavouring component // 2636363
FIELD: tobacco industry.SUBSTANCE: method for producing a black liquor includes brewing a tobacco feedstock in an alkaline medium; separating the produced brewing product into a black liquor and a tobacco fiber to obtain a black liquor, which includes a flavouring component suitable for use in a tobacco product; and neutralizing the produced brewing product after the brewing step or black liquor after the separation step.EFFECT: reduction of the number of technological processes without deterioration of the tobacco taste.19 cl, 12 dwg, 4 tbl

Use of surfactants for pulp processing and improvement of craft pulp introduction in fibre for obtaining viscoose and other secondary fibre products // 2636306
FIELD: chemistry.SUBSTANCE: craft pulp fibre from bleached softwood processed with the surfactant is considered, that is used as a starting material, to obtain the derivatives of cellulose including simple cellulose ether, cellulose esters and viscose. Methods for obtaining fibre from craft pulp and products made from it are also contemplated.EFFECT: improved properties.23 cl, 5 dwg
Cellulose compositions, methods for cellulose compositions production and products containing cellulose compositions // 2635162
FIELD: chemistry.SUBSTANCE: viscosity modification composition comprises cellulose slurries containing at least 60% of cellulose by dry weight, less than 10% of pectin by dry weight, and at least 5% of hemicellulose by dry weight. The composition can be concentrated to solids content of at least 25% by weight by compression at low pressure while retaining the ability to be resuspended in an aqueous medium.EFFECT: resulting aqueous medium retains the desired properties, increased viscosity, or increased dispersion of pigment particles, to the same extent as the composition prior to compression.22 cl, 7 dwg

Evaporation tank with flared inlet insert // 2634893
FIELD: machine engineering.SUBSTANCE: evaporation tank comprising an inner chamber having an inner surface formed by a sidewall of the evaporation tank; a channel for waste steam connected to the upper portion of the chamber; an inlet channel for liquid connected to the lower portion of the chamber; an inlet pipe having an insert outlet channel and inserted into the chamber inlet. The inlet pipe passes into the sidewall and the insert outlet channel has extended form in cross-section oriented substantially in parallel to the central vertical axis of the evaporation tank and substantially perpendicular to the radial line of the evaporation tank, so that the insert outlet channel is substantially tangential to the sidewall.EFFECT: invention provides efficient and continuous operation of the device.5 cl, 5 dwg
ethod of producing cellulose pulp // 2606867
FIELD: technological processes.SUBSTANCE: method of defibring lignocellulose-bearing raw material with a polysulphide-bearing cooking liquor in a boiler for continuous cooking. According to this invention, the cooking liquor is mixed into the raw material which is to be defibred before the cooking, and the cooking liquor is allowed to absorb into the raw material at a temperature which is at maximum approximately 130 °C. After that, cooking liquor used in the absorption is separated from the treated raw material, separated cooking liquor is heated to a temperature of approximately 140–170 °C, after which, the generated hot cooking liquor is mixed back into the treated raw material, possibly together with a fresh feed of cooking liquor, and raw material is defibred with a hot cooking liquor in the boiler for continuous cooking in order to produce cellulose pulp which has a desired kappa number. Thus, in the cooking stage, alkaline cooking liquor which originally was dosed into the absorption solution is used, but the temperature of which has been increased; absorption liquor is not removed, and fresh liquor is not fed into the boiler for continuous cooking or, it is fed, but only in a small amount.EFFECT: disclosed is a method of defibring raw material.18 cl, 2 dwg, 1 ex

Production of fermentable sugars and lignin from biomass using supercritical fluids // 2597588
FIELD: biotechnology.SUBSTANCE: invention relates to a method for increasing the level of glucose produced from lignocellulose biomass, and product made using the said method. Method for increasing the level of glucose produced from lignocellulose biomass involves fabrication of a fractionated biomass, which contains the first solid fraction of cellulose and insoluble lignin; and the first liquid fraction; mixing of the above solid fraction with water for production of a suspension; optional preliminary heating of the said suspension to a temperature below the critical temperature of water; contact of the said suspension with the second reaction fluid medium, during which there is formed the second solid fraction containing insoluble lignin; and the second liquid fraction containing saccharide, selected from a group of cellooligosaccharades, glucose and mixtures thereof; wherein the said second reaction fluid contains water and, optionally, carbon dioxide, while the said second reaction fluid medium has a temperature and pressure above the critical point of water and carbon dioxide; and reduction of the temperature of the above mentioned reaction mixture to a temperature below the critical temperature of water; and an optional hydrolysis of the said second liquid fraction for production of glucose.EFFECT: higher efficiency of biomass conversion from renewable resources and/or wastes in more valuable products.27 cl, 7 ex, 3 tbl, 15 dwg

ethod and apparatus for efficient production of soluble cellulose on line at sulphate cellulose production, producing cellulose for paper, using cooking boiler of continuous action // 2596453
FIELD: pulp industry.SUBSTANCE: method and plant for pulp manufacturing used in a kraft process include vertical reservoir operating under pressure, operating in intermittent mode, boiling vessel of continuous action with one or more tanks and other equipment used for subsequent processing non-bleached sulphate cellulose, for example, for washing, oxygen delignification and bleaching and drying. Feed and transportation system may include a high pressure feed system or direct feed and selectively performs material supply, containing organic fibres, in boiling vessel of continuous action during production of cellulose of lower grade and in vertical reservoir operating under pressure during production of cellulose of higher grade, for example soluble cellulose. Vertical reservoir operating under pressure is used for prehydrolysis and neutralisation, after which obtained pulp is directed to boiling vessel of continuous action for cooking. White liquor and the black liquor from same line can be used as neutralising media.EFFECT: same boiling vessel of continuous action is selectively used for boiling with respect to production of cellulose of various grades and quality.50 cl, 12 dwg
ethod for producing polymer product from vegetable raw materials and product produced using said method // 2594852
FIELD: chemistry.SUBSTANCE: invention relates to methods of producing polymer compositions, containing modified ingredients of vegetable raw material, more specifically to methods for producing multifunctional polymer products by liquid-phase catalytic oxidative modification of vegetable raw materials. Method of producing polymer product from vegetable raw material includes: liquid-phase oxidation of vegetable raw material, wherein the formed suspension is subjected to cavitation-hydrodynamic treatment in a rotary-oscillatory apparatus of "rotor-stator" type in resonance conditions at supply of oxygen and/or oxygen-containing gas to outlet zone of cavitation cloud of disruption of continuity of liquid phase from rotor channels in chamber of stator; formed mixture of low-molecular products and surface-active substances are removed.EFFECT: technical task of this invention is development of method for producing polymer products from vegetable raw materials with given properties at reduced time of oxidation process and reduced specific power consumption, as well as product produced using the said method.19 cl, 6 ex

ethod of producing cellulose // 2590882
FIELD: pulp and paper industry.SUBSTANCE: invention relates to processing wastes, particularly to method of producing cellulose, which can be used in pulp and paper and chemical-pharmaceutical industries as sorbent and filtration material in equipment, as well as raw material for producing biofuels. Boiling of birch wood chips is carried out in a solution containing 15.0 wt%. of formic acid, 1.0-3.0 wt%. of hydrogen peroxide in presence of titanium dioxide as catalyst in amount of 1.0 % of absolutely dry wood weight, while stirring continuously, water duty equal to 6, temperature of 80-90°C for 2 hours with subsequent bleaching with solution containing 2.0-4.0 wt% of sodium hydroxide and 1.0-2.0 wt% of hydrogen peroxide, water duty equal to 8 at 90°C for 1-2 hours and separation of end product.EFFECT: technical result is increased efficiency of procedure, improved environmental friendliness of process and increased yield of cellulose product with high content of cellulose due to usage of non-toxic solid catalyst, titanium dioxide.1 cl, 1 tbl

Chemical treatment of material of bundles of lignocellulose fibres and related methods and systems // 2588625
FIELD: paper industry.SUBSTANCE: invention relates to production of cellulose mass and refers to chemical-mechanical method of processing material of bundles of lignocellulose fibres. Lignocellulose material is subjected to separation into fibres without impregnation with chemical reagents. Chemical processing of peroxide alkaline reagent lignocellulose material is performed during or after separation of fibre material, which is converted into bundles of fibres. Before formation of bundles of fibres and holding of treated with peroxide alkaline reagent unit of wet beams cleaning device is not used.EFFECT: invention provides optimising process of producing cellulose mass.17 cl, 2 dwg

ethod for dissolution of lignocellulose materials // 2577836
FIELD: chemistry.SUBSTANCE: in accordance with the claimed method a lignocellulose material is brought in contact with the conjugated acid, formed by a strong organic base and a weaker acid, under the conditions, which lead to at least the partial dissolution of the cellulose components of the lignocellulose material.EFFECT: method makes it possible to extract a part of a dissolved portion of the lignocellulose material by means of the partial dissociation of the conjugated acid, the method makes it possible to extract a part of the dissociated organic base and acid, obtain the conjugated acid from an extracted base and acid and supply it in recycle to the first stages of the method.

ethod of determination of lignin in cellulose semi-products // 2557744
FIELD: chemistry.SUBSTANCE: method of the determination of lignin in cellulose semi-products by chemical processing with the following separation of lignin and determination of its quantity consists in the fact that chemical processing of a cellulose semi-product is carried out with 1 ml of a reagent, which is prepared by mixing concentrated nitric acid and dioxane in a ratio of 1:1 by volume, at heating on a boiling water bath for 5 minutes, with the determination of lignin being realised by means of spectrophotometry at 340 nm after preliminary alkalisation and separation of the cellulose residue that does not dissolve.EFFECT: simplification and acceleration of the analysis performance.1 cl, 14 ex, 1 tbl

Production of fermentation sugars and lignin from biomass with application of supercritical fluids // 2556496
FIELD: process engineering.SUBSTANCE: in compliance with this process, preliminary processing includes bringing of said biomass with the first supercritical, near-critical or precritical fluid. This brings about a solid matrix and first fluid fraction. Hydrolysis is performed whereat said solid matrix gets in contact with second supercritical, near-critical or precritical fluid to make second fluid fraction and insoluble fraction containing lignin.EFFECT: higher biomass conversion from wastes into valuable products.35 cl, 3 tbl, 15 dwg

ethod and system for thin chips boiling in digester // 2555655
FIELD: process engineering.SUBSTANCE: proposed process comprises the steps that follow. Thin 6 mm deep (maximum) chips are fed into bin. White (boiling) lye is added thereto or in chits transfer tube extending from said bin to continuous boiling digester top inlet. Medium-pressure steam or other heated fluid is forced to digester top area to up the boiling temperature to at least 130°C. Chips are boiled in digester downstream without extraction from or addition to digester boiling area of lye. Flushing fluid is forced to digester bottom area. Flushing fluid is discharged from digester bottom area through the sieve. Digested thin chips are discharged from boiler bottom area.EFFECT: perfected method.17 cl, 1 dwg
ethod of cellulose obtaining // 2547689
FIELD: chemistry.SUBSTANCE: method of obtaining cellulose consists in cooking wood chips at a temperature of 98-100°C, intensive mixing and atmospheric pressure in a mixture, which contains 3.0-5.6 wt % of hydrogen peroxide and 15.0-25.0 wt % of acetic acid in the presence of a titanium dioxide catalyst, present in an amount of 0.5-1.0% of the chips weight with cooking duration for 2.5-3.5 hours and a hydromodulus of 5-15 with the following separation of the target product.EFFECT: improvement of the ecological safety of the process and simplification of the method due to the application of the inert titanium dioxide catalyst with the preservation of high output and quality of the cellulose product.1 tbl

ethod and plant for processing of cellulose plant black liquor // 2546514
FIELD: process engineering.SUBSTANCE: invention relates to processing of black liquor of cellulose plant for extraction of chemicals and power contained therein. Proposed process comprises feed of black liquor into pyrolysis reactor with, in fact, no oxygen space. Sand heated in boiler with fluidised bed is fed into said reactor to gasify said black liquor so that gaseous components and soli matter are formed. Gaseous components formed in pyrolysis reactor are directed for recovery. Sand is separated from solid matter formed in pyrolysis reactor and returned back into boiler with fluidised bed. Water is added to remained solid matter to dilute soda contained in solid substance. Formed soda-water solution is returned to cellulose coking and remained solid coal to boiler with fluidised bed. This plant comprises the boiler with fluidised bed, pyrolysis, sand feeder, means to direct gaseous components, sand separator from solid matter, means to return separated sand, mixing reactor, means to return soda-water solution to cooking process and remained solid coal to boiler with fluidised bed.EFFECT: extraction of chemicals and power in one cycle, increased volume of formed gases.31 cl, 4 dwg

ethod and system of producing soluble cellulose mass with high content of alpha-cellulose // 2535804
FIELD: chemistry.SUBSTANCE: method of processing a cellulose mass by the Kraft-process with preliminary hydrolysis (PHKP) includes the addition of wood chips or a similar material into a reaction vessel, carrying out preliminary hydrolysis and neutralisation of the mixture by the first quantity of white liquor with the further addition of another solution, such as an alkaline filtrate of cold-alkaline extraction, if necessary, enriched with white liquor. Neutralisation liquids are replaced with digestion liquor, containing hot black liquor and the alkaline filtrate, if necessary, enriched with the white liquor. The concentration of effective alkali in the digestion liquor can be relatively high.EFFECT: effective and cost-effective production of soluble cellulose with the high content of alpha-cellulose by the prevention of re-precipitation of hemicelluloses.43 cl, 18 dwg, 1 tbl, 10 ex

ethod for integrated production of cellulose and reusable low-molecular weight materials // 2535222
FIELD: chemistry.SUBSTANCE: invention relates to an integrated method of producing cellulose and at least one reusable low-molecular weight material. The method comprises preparing starting material containing lignocellulose and pulping using an alkaline treatment medium; from the pulped material, separating a cellulose-rich fraction and a cellulose-depleted fraction; subjecting the cellulose-depleted fraction to treatment using a method selected from a group comprising depolymerisation, hydrocracking, decarboxylation and a combination thereof; obtaining at least one reusable (secondary) low-molecular weight material selected from a group including, for example, hydrogen, aliphatic, cycloaliphatic, aromatic hydrocarbons and mixtures thereof, aromatic alcohols, aromatic aldehydes and mixtures thereof.EFFECT: invention enables optimum integration of production of said end products, including additional reusable materials when producing cellulose.31 cl, 6 ex, 3 dwg

ethod of determining lignin // 2535018
FIELD: chemistry.SUBSTANCE: method comprises mixing lignocellulose material with an aqueous dioxane solution which is obtained by mixing concentrated nitric acid and 1,4-dioxane in ratio of 1:4 (by volume), heating the reaction mixture on a boiling water bath for 15 minutes, adding 2 M sodium hydroxide solution, adjusting the volume of the reaction mixture with distilled water and filtering, measuring optical density of the filtrate at 440 nm and determining content of lignin in the cellulose semiproduct based on the value of optical density.EFFECT: simpler and faster analysis.2 tbl, 24 ex

ethod of obtaining cellulose from lignocellulose-containing biomass // 2534067
FIELD: chemistry.SUBSTANCE: described is a method of obtaining cellulose by the separation of lignin from a lingocellulose-containing biomass in the form of plants or their parts, in which the lingocellulose-containing biomass is boiled in a digester in an alkaline medium, containing alkanolamine, and the dissolved lignin is separated from the obtained raw cellulose. The claimed method is characterised by the fact that the lingocellulose-containing biomass is not produced from wood and is solubilised at a temperature lower than approximately 170°C in a boiling agent based on alkanolamine and water, where the weight ratio of alkanolamine and water constitutes from 60:40 to 30:70, and the obtained raw cellulose is separated from the spent alkaline solution by usual methods. The claimed method is especially advantageous for obtaining cellulose from annual plants, in particular from wheat straw. The claimed method is characterised by high efficiency, in particular due to a great degree of the applied alkanolamine regeneration and results in a smaller impact on the environment with sewage waters and to lower the utilisation cost.EFFECT: method realisation results in high cellulose output and prevents decomposition of alkanolamine, in particular monoethanolamine (MEA) to a greater degree.26 cl, 8 tbl, 1 dwg

Heat recuperation from spent cooking liquor in cooking boiler at pulp and paper mill // 2532568
FIELD: textiles, paper.SUBSTANCE: system of the cooking boiler of the pulp and paper mill produces black liquor. The stream of black liquor (7) is removed from the cooking boiler and subjected to flash evaporation to provide flash evaporation vapour. The flash evaporation vapour (10) comes into indirect heat exchange contact with at least one heat exchanger (9) with white liquor (11) or white liquor and other liquid to provide the heated white liquor (14) or the heated mixture. The black liquor (19) flash evaporated is subjected to further processing for recuperation of heat or evaporation.EFFECT: invention enables to increase the energy savings at the pulp and paper mill.3 cl, 2 dwg

ethod of delignifying and bleaching pulp with activated hydrogen peroxide // 2529974
FIELD: chemistry.SUBSTANCE: invention relates to a method of delignifying and bleaching pulp, which includes at least a step of bringing the pulp into contact with hydrogen peroxide and a molybdenum-based complex of formula (I): where R denotes an unsaturated C5-C6 cycloalkyl group or an unsaturated C5-C6 heterocycloalkyl group, substituted or unsubstituted, and Ar denotes an aryl group optionally having one or more substitutes in the aromatic rings, which are one or more linear or branched C1-C4-alkyl groups, -halogen, -NO2, -OH, -COOH.EFFECT: reduced cellulose decomposition and consumption of chemical compounds.14 cl, 1 tbl

ethod of producing sulphate pulp // 2524904
FIELD: chemistry.SUBSTANCE: method includes soaking and extracting wood chips with a mixture of black and white liquor with effective alkali concentration of 15.0 g/dm3 and temperature of the mixture of 120-130°C, separating the extract from the mass and sulphate pulping with consumption of white liquor per effective alkali of 14-15% with respect to oven-dry wood.EFFECT: high output and strength properties of the pulp.3 tbl

ethod and system for pulp processing using cold caustic extraction with alkaline filtrate reuse // 2523973
FIELD: chemistry.SUBSTANCE: method for pulp processing using cold caustic extraction includes: delignifying organic materials in a digester and treating the resulting brown pulp to obtain semi-purified pulp for use in producing soluble pulp; extracting the semi-purified pulp with a caustic solution during a cold caustic extraction process; washing the purified pulp and collecting the obtained spent wash liquid by separating the hemicellulose-containing solution from the purified pulp; combining the spent wash liquid and the hemicellulose-containing solution to obtain an alkaline filtrate; concentrating the alkaline filtrate and using at least a portion of the concentrated alkaline filtrate in said digester to obtain a soluble pulp.EFFECT: high content of alpha cellulose in soluble cellulose and high efficiency of using the filtrate.50 cl, 5 dwg, 1 tbl, 4 ex

ethod of processing biomass into cellulose and solution of low-molecular weight oxidation products (versions) // 2515319
FIELD: chemistry.SUBSTANCE: invention relates to methods of obtaining cellulose and low-molecular weight oxygen-containing compounds from processing biomass from forestry and agricultural wastes. The method of processing biomass involves heating water to 58-75°C, adding FeCl3 × 6H2O, holding the solution at 58-75°C for not less than 10 minutes while stirring continuously. After complete precipitation of Fe3+, the biomass is added with ratio of water to biomass of 10-20; the mixture is stirred and held for not more than 10 hours. Hydrogen peroxide is then added with ratio of hydrogen peroxide to biomass of 3.5:0.5; the mixture is stirred at temperature of 25-70°C until hydrogen peroxide is exhausted. The obtained oxidate is separated into a solid precipitate and a solution of water-soluble products. The solid precipitate is washed with water, which is then used in the next cycles and/or is added to the aqueous solution of water-soluble products. Versions of the method involve further addition of 1-10% lower alcohol to water and/or addition of soda to FeCl3 × 6H2O with weight ratio of iron chloride and soda of 1.5-80. Versions of the invention enable to combine synthesis of a catalyst and oxidative processing of biomass in a single cycle (reactor). Output of water-soluble products and solid precipitate (cellulose) can be controlled depending on the ratio of the catalyst and the biomass. The water-soluble products contain organic acids and polyphenols, which can be used as preservatives and biological additives in producing feedstuff in agriculture.EFFECT: reducing water consumption by about an order, as well as consumption of energy and components.15 cl, 1 tbl, 9 ex

Composition for inhibiting formation of deposits of calcium salts // 2508426
FIELD: textiles, paper.SUBSTANCE: method comprises adding an effective amount of composition inhibiting deposition to the alkaline aqueous mixture in the boiler for pulping method. At that the composition comprises at least one phosphonate component (I) and at least one component (II) consisting of at least one carboxylated fructan compound. Also the invention relates to embodiments of a method of inhibiting the formation of calcium salt deposition in an aqueous system in a selected alkaline pulping method, and a method of producing pulp and the composition itself for inhibiting the formation of calcium salt depositions in an aqueous system in an alkaline pulping method.EFFECT: use of this invention enables to inhibit more effectively the formation of calcium salt depositions.15 cl, 2 ex, 3 dwg
ethod of production of sulfate pulp for chemical processing // 2499857
FIELD: textiles, paper.SUBSTANCE: method comprises processing of wood chips in two stages with aqueous alkaline media prepared by mixing black and white liquors and containing 15-30 g/dm3 of active alkali in units of Na2O for the first stage and 55-70 g/dm3 for the second stage. Processing at the first stage is carried out with the temperature rise to 125-155°C for 30 minutes and exposure for impregnation, hydrolysis and pulping at the final temperature for 60 minutes. The output of the waste media at this stage is carried out by its displacement with the aqueous medium for the second stage. The second stage is carried out with the temperature rise to 140°C for 40 minutes, exposure for impregnation and pulping at this temperature for 40 minutes, the temperature rise to 170°C for 40 minutes, exposure for pulping at 170°C for 90 min.EFFECT: possibility is provided to obtain from larch wood the pulp for chemical processing or sanitary and hygienic purposes with values acceptable for these purposes for Kappa pulp, viscosity and content of α-cellulose, increase in pulp yield, increase in utilisation rate of heat and chemicals of waste alkaline media.4 cl, 1 tbl

Single vertical tank of atmospheric pressure for steaming, suspending, impregnation and digestion of fibrous material // 2497995
FIELD: textiles, paper.SUBSTANCE: continuous cooking system comprises one generally vertically oriented vessel of atmospheric pressure, comprising an upper part and a lower part for receiving the ground cellulosic fibrous raw material. In the tank, the steaming, suspending, impregnation and digestion of fibrous material is carried out prior to discharge of boiled fibrous material from the lower part of the tank. The tank comprises: the measuring means for continuous feeding of the fibrous raw material in the tank from its upper part, the means for generating the first level of fibrous raw material in the tank, the means for creating a pressure in the upper part of the reservoir corresponding to the substantially atmospheric pressure in the range of +0.5 bar to -0.5 bar, means for creating a second liquid level in the tank, where the second level is located lower than the first level, to form this way the volume of the fibrous raw material in a pile over the total volume of liquid in the tank, the means for supplying the impregnating liquid to the first end of the first upper liquid volume in the total volume of the liquid, the means for feeding cooking liquor to the first end of the second lower liquid volume in the total volume of the liquid, the means for heating the cooking liquid in the second lower liquid volume in the total volume of the liquid, the means for removal the exhaust cooking liquor from the other end of the second lower liquid volume, the means for continuous discharge of the suspension of the boiled fibrous raw material from the area near the lower part of the tank and supply of the suspension in the systems subsequent after cooking. Atmospheric pressure tank, being a single tank for processing, where the fibrous raw material is impregnated and boiled to such an extent that the boiled fibrous raw material reaches the kappa number magnitude of 100.EFFECT: continuous cooking system is greatly simplified by the use of a single vertical tank of atmospheric pressure, replacing conventional hopper for chips, a steaming reservoir, a gutter for chips, a high-pressure pump or flushing feeders, impregnating boilers and an upper separator.11 cl, 5 dwg

Peroxide-alkaline treatment of waste products on integrated neutral-alkaline pulp and paper plant // 2495177
FIELD: textiles, paper.SUBSTANCE: production processes of mechanical wood pulp using refiners are disclosed, and more particularly, the wood-pulp plant is disclosed which is integrated with the neutral-alkaline processes of paper production, generating printing paper from mechanical wood pulp. The waste products are treated with hydrogen peroxide, alkali and an organic stabilising additive immediately before or during refining, that provides improved optical and physical properties of the refined waste products and uses electrical energy more efficiently to achieve the desired quality of the fiber after bleaching for cost-effective production of a wide variety of coated and uncoated printing paper from mechanical wood pulp.EFFECT: improvement of quality of rejected material.4 cl, 2 tbl, 12 dwg
Production method of sulphite pulp of mixture of different wood species chips // 2493308
FIELD: woodworking industry.SUBSTANCE: method includes the use of three batch cookers sequentially interconnected by liquid-phases, loading them with a mixture of chips of different species of wood, including wood of larch, pine, spruce, birch, aspen, preliminary two-stage treatment of the mixture of chips with the aqueous medium at elevated temperature at the first stage to produce an extract and with the hot solution of lignosulphonates at the second stage by successive filling the cookers with the aqueous medium, the solution of lignosulphonates and cooking liquor and discharge from the cookers of the aqueous medium by its displacement with the solution of lignosulphonates, the discharge of this solution by its displacement with the cooking liquor. The aqueous extract discharged from the process is used for production of arabinogalactan and flavonoids. Pulp cooking is carried out by bisulfite method.EFFECT: improvement of pulp quality, simplification of processing the extract to obtain arabinogalactan and flavonoids due to their increase in the extract.7 cl, 2 tbl

ethod of treatment of plant cellulose-containing materials // 2493307
FIELD: textiles, paper.SUBSTANCE: method of treatment of plant cellulose-containing materials includes the use of the device consisting of a housing, bottom and lid forming its working cavity, equipped with a means of its temperature-controlled heating, external means of recirculation of the liquid phase. The device comprises a working cavity which is divided into zones formed by the elements placed in the cavity, each of which consists of a cylindrical part and a perforated bottom with a plated filter screen located on it. Loading of the material in the device is carried out by its preliminary loading in the elements and their subsequent installation into the cavity. The elements are loaded with materials differing in characteristics. Replacement of one liquid phase in the device is carried out by displacement by the other liquid phase. Removal of products of each material treatment is carried out separately.EFFECT: ability simultaneous treatment of several different samples of materials in the same modes and alignment of the characteristics of these samples.1 cl, 3 dwg, 1 ex
ethod of producing sulphate pulp from mixture of chips from different species of wood // 2491379
FIELD: textiles, paper.SUBSTANCE: method for producing sulphate pulp from a mixture of chips from different species of wood includes the use of three batch cookers sequentially interconnected by liquid phases, their loading with a mixture of chips from different species of wood, including wood of larch, pine, spruce, birch, aspen, preliminary two-stage treatment of the mixture with water extraction at the first stage and black liquor at the second, removal of the extract from the cooker, supply to the cooker of cooking liquor, recycling the extract to obtain arabinogalactan. Both extraction treatments are carried out in three cookers interconnected by liquid phases by their sequential filling with each of the liquid phases with the removal of the aqueous extract by its replacement from the cookers by black liquor and the removal of the black liquor by its displacement by the cooking liquor.EFFECT: alignment of the characteristics of chips from all types of wood and increase in the concentration of arabinogalactan in the aqueous extract.4 cl, 1 tbl, 3 ex
ethod of production of cellulose // 2490384
FIELD: textiles, paper.SUBSTANCE: method of production of cellulose lies in cooking wood chips at a temperature of 90-98°C, thorough mixing and at atmospheric pressure of 740-760 mm Hg in a mixture containing 3.9-5.6 wt % hydrogen peroxide, 25.2-26.7 wt % acetic acid in the presence of 2.0 % by weight of sulfuric acid catalyst chips with a duration of cooking of 2.5-3.5 hours, and irrigation modulus of 5-10 with subsequent isolation of the target product.EFFECT: simplifying the method of production of cellulose, increase in target product yield, improvement of quality characteristics of the target product by increasing the content in it of holocellulose and reduction of residual lignin.1 tbl, 11 ex
ethod to produce cellulose for sanitary-hygiene types of paper // 2488653
FIELD: textile, paper.SUBSTANCE: method to produce cellulose for sanitary-hygiene types of paper is realised by means of wood chips boiling with a sulfite solution in presence of a mixture of anion, non-ionogenic and amphoterous surfactants, and also a salt or salts from a group including phosphates and carbonates of sodium, disilicate and sodium sulfate. Mixture consumption is 0.3-1.5 kg per 1 t of absolutely dry chips.EFFECT: reduction of resin and oil content in cellulose, level of contamination of paper machine elements with resin particles, higher mechanical strength of cellulose at its lower stiffness, increased absorption ability.1 tbl
ethod of production of cellulose // 2487206
FIELD: textiles, paper.SUBSTANCE: method is carried out by successive soaking of cellulose raw material in alkaline solution thermo-mechanical chemical processing, extraction, washing, bleaching, extraction, washing, extraction and drying, and herbaceous plants are taken as the cellulose raw material. Before drying the cellulose raw material is loosened to individual fibres, transported on screws in which the diffusion alignment is carried out on moisture by volume, followed by drying in a microwave unit.EFFECT: invention enables to reduce energy costs and to obtain cellulose which is uniform on quality characteristics.10 cl, 3 ex, 1 tbl

ethod and systems for bleaching of lignocellulosic mass after cooking with soda and anthraquinone // 2479683
FIELD: textiles, paper.SUBSTANCE: method can provide whiteness corresponding to the standard in bleaching of sulphate pulp using a similar sequence of bleaching. In some cases, the bleaching sequences may be O-A-Do-Eop-D, O-A-ZDo-Eop-D, A-Do or A-ZDo.EFFECT: conformance to standards of bleaching.23 cl, 2 tbl, 1 dwg

ethod and system for semichemical cooking // 2479682
FIELD: textiles, paper.SUBSTANCE: method and device generally relate to feeding of white liquor and NaOH to increase the pH of the cooking liquor on the extraction sieve or near it, which inhibits adhesion of lignin to the extraction sieve.EFFECT: invention enables to prevent clogging of the extraction sieve.20 cl, 2 dwg

Pulsation apparatus for delignification of cellulose-containing plant material and method for operation thereof // 2479619
FIELD: chemistry.SUBSTANCE: material is fed into a mixer 1 and treated with steam from a pipe 10. The treated material is then fed into a screw feeder 2 which is provided with valve locking device. The reactor 3 is in form of a vertical cylindrical vessel which is provided with means of loading and unloading material and a means of intensifying agitation of the reaction mass, having a pulsation chamber 4, which encloses the reactor 3, and a pulsator - pulse generator 12. Cooking liquor is fed into the reactor 3 through pipe 5. Spent cooking liquor is removed from the reactor 3 through pipe 6. Steam is fed into the reactor 3 through pipe 7, which is fitted with steam injectors. The reaction mass is subjected to acoustic energy pulses with frequency of 5-70 pulsations per minute with energy density of 3-100 MJ/mol. The pulsator - pulse generator 12 consists of a compressor 13, a receiver 14, a pipe 16 and a pulse generator 15. The reaction mass is moved into the top part of the reactor 3 and, using a blade or scrapping device 8 of a screw device 9, the ready product is separated from the cooking liquor to obtain the end product - edible cellulose.EFFECT: simple reactor design and delignification technology, low power consumption, while improving quality of the cellulose mass.3 cl, 3 dwg

ethod for production of sulfate cellulose from larch wood // 2477346
FIELD: textile, paper.SUBSTANCE: method for production of sulfate cellulose from larch wood includes two stages of wood chips extraction using water at the first stage as the extractant and at the second stage - black lye, and subsequent boiling in a boiler of periodic action.EFFECT: higher mechanical properties of cellulose and reduced value of Kappa number - when producing viscose cellulose.3 cl, 1 dwg, 2 tbl

ethod of extraction of larch wood chips // 2475576
FIELD: textiles, paper.SUBSTANCE: method of extraction of larch wood chips using the batch-operated boiler for cooking sulphate cellulose includes extraction of wood chips with water at elevated temperature with subsequent processing of the extract. Extraction is carried out in two consecutive stages with use of black liquor at the second stage at its estimated elapsed time as the extract. Water extraction is carried out with fresh water in the mode of extractant recirculation with automatic measurement during the extraction of the electrical conductivity of the extract and automatic calculation on the measured data of the derivative of this parameter of time. With a reference value of the electrical conductivity derivative of time the second stage is followed using automatic system of process control.EFFECT: increased level of removal of organic matter from wood chips without its mechanical breakdown, and the possibility of carrying out the extraction process in the automatically controlled mode.3 cl, 1 dwg
ethod of producing cellulose wood pulp // 2474635
FIELD: textiles, paper.SUBSTANCE: method includes cooking of cellulose containing raw material in the presence of hydrogen peroxide, followed by alkali extraction and washing off. Carbon dioxide in the supercritical state is used as a medium, and the hydrogen peroxide is added in the form of a solution containing at least 30% hydrogen peroxide. Consumption of hydrogen peroxide for cooking is at least 65% by weight of oven-dry wood.EFFECT: invention enables to produce cellulose wood pulp which has high mechanical strength, to improve the environmental situation near the manufacturing enterprises.5 cl, 6 ex, 1 tbl
ethod of extraction larch chip // 2472889
FIELD: textiles, paper.SUBSTANCE: method includes the use of three batch-operated boilers for kraft process, consistently linked together by a liquid phase, carrying out a two-stage extraction in them - with water on the first stage and the black liquor on the second, and the aqueous extract is removed from the boilers by its displacement by the black liquor, and the black liquor is removed by its displacement by the cooking liquor. The whole process of extraction and filling the boilers with the cooking liquor is carried out in an automatically controlled manner following the sensor signals of filling the boilers with extractants and the cooking liquor.EFFECT: high level of extraction from the chips of components harmful for subsequent cooking is achieved to obtain an aqueous extract with high content of arabinogalactan and flavonoids.6 cl
ethod of production of sulphate pulp from larch wood // 2472888
FIELD: textiles, paper.SUBSTANCE: method is carried out with the use of three batch-operated boilers, sequentially interconnected by a liquid phase, and the two stages of extraction - with water and then black liquor, and the aqueous extract is removed from the boilers by its displacement by the black liquor, and the black liquor is removed by its displacement by the cooking liquor. The duration of the complete filling of the boiler with the liquid phase and, respectively, equal to it duration of the complete replacement in the boiler of one liquid phase with its displacement by another phase, are equal to duration of efficient extraction determined experimentally.EFFECT: invention enables to improve the mechanical properties of pulp, to reduce Kappa number, and reduce the duration of extraction when increasing the concentration of arabinogalactan in the aqueous extract.5 cl, 2 tbl
ethod of complex processing of larch wood // 2472887
FIELD: textiles, paper.SUBSTANCE: method includes the use of three batch-operated cooking boilers for bisulfite pulping, sequentially interconnected by a liquid phase, the extraction of wood chips with its predetermined duration of lignosulphonate solution, boiling chips, while the extract is removed from the boilers by its displacement by bisulphite cooking liquor. Extraction of wood chips and filling the boilers with the cooking liquor is carried out in a controlled automatic manner following the sensor signals of filling the boilers with the liquid phases.EFFECT: invention enables to improve the degree of removal from chips of arabinogalactan and flavonoids, to obtain the extract with the high concentration of these components in it, and to provide the ability to control automatically flows of the liquid phases in the boiler when processing chips.3 cl, 1 ex

Impregnating chamber with relief narrowing (versions) and method for heating of cellulose material in it // 2469142
FIELD: textile, paper.SUBSTANCE: impregnating chamber comprises a chamber reservoir, including an upper inlet nozzle for receiving cellulose material; a lower outlet channel for discharge of cellulose material from a discharge section of the chamber reservoir; a section of a narrowing profile inside the chamber, through which a flow of cellulose material passes in the chamber; a cavity between the inner wall of the chamber and the section of narrowing profile, in which the cavity has a lower hole to the side of cellulose material in the chamber and an upper section separated from the flow of cellulose material in the chamber, and an inlet channel in the chamber and a hole into a cavity, in which the inlet channel is connected to a source of hot fluid added to a cellulose material in the chamber.EFFECT: homogeneity of cellulose material treatment.23 cl, 4 dwg

Two-column reactor system and method of hydrolysis and digestion of wood chips with chemically amplified washing method // 2465384
FIELD: textiles, paper.SUBSTANCE: reactor column system comprises the first reactor column having an extraction filter for extracting hydrolysate and liquid, the first zone above the extraction filter, which is maintained under conditions that induce the hydrolysis reaction in the cellulosic material, the second zone below the extraction filter, in which the hydrolysis is essentially suppressed, and an inlet fitting for washing liquid below the extraction filter feeding the washing liquid at a temperature below the temperature of hydrolysis. The system also comprises the transport pipeline which has the inlet branch connected to the first reactor column, and the outlet branch is connected to the second reactor column, and the second reactor column comprises an outlet branch for output of liquid that removes part of the liquid from the second reactor column and directs the part of the liquid to the first reactor column or to the transport pipeline.EFFECT: invention enables to avoid entering cooking chemicals in the cellulosic material in the process of hydrolysis.56 cl, 1 dwg

Reactor system with one vessel for hydrolysis and pulping wood chips with chemically intense flush method // 2463402
FIELD: textiles, paper.SUBSTANCE: reactor vessel has an inlet to enter the cellulosic material and an outlet for discharging cellulosic material, and the cellulosic material flows through the reactor vessel from the inlet for the material to the outlet to unload the material; extracting sieve for hydrolysate and liquid; hydrolysis zone between the inlet for the material and extracting sieve for hydrolysate and liquid. Hydrolysis zone is maintained at a temperature of hydrolysis or above the temperature of hydrolysis at which the reaction of hydrolysis of the cellulosic material takes place. The reactor vessel contains the flush zone between the extracting sieve for hydrolysate and liquid and extracting sieve for flushing fluid, where hydrolysis is suppressed; an inlet pipe for flushing fluid to enter the flushing fluid in the flush zone. At least a part of flushing fluid flowing into the inlet pipe for flushing fluid flows through the flushing zone and is extracted with extracting sieve for hydrolysate and liquid, and the flushing fluid is entered into the flushing zone at a temperature below the temperature of hydrolysis. The reactor vessel contains a pulping area between the flushing zone and unloading zone for release of material, and the said pulping area includes a pipe for injecting of cooking liquor; and extracting sieve for cooking liquor in the pulping area or under the pulping area, and over the unloading release for the material, and the flushing fluid is a mixture of water and at least one of the substances, such as sodium hydroxide and white liquor, essentially free of sulfur.EFFECT: reduction of risk of precipitation of lignin and other dissolved wood components, and reduction of consumption of alkali during the chemical pulping of cellulosic material.40 cl, 1 dwg

Container for processing straw or other light, bulk materials and method of its implementation // 2462545
FIELD: textile industry.SUBSTANCE: processing is carried out in a container for chemical processing. Light bulk cellulosic material is introduced into the upper part of essentially vertical container for processing. The material is exposed in the container at a pressure of at least 20 bar and at a temperature of at least 200°C. The material is processed with the cooking liquor in the container and the material is moved with at least one ring counter compression, located on the inner surface of the container when movement of the material down through the container. The material is mixed in the container and the processed material is released from the lower outlet of the container.EFFECT: container for chemical treatment has a relatively simple design that enables to process a large volume of light, bulk cellulosic material.12 cl, 3 dwg