Modifying additive for a detergent composition, its preparation and spherical degranula on the basis of hydrated silicate

 

(57) Abstract:

The invention relates to a structure-forming additive for detergent compositions formed by an aqueous solution of alkali metal silicate, such as sodium or potassium, with a molar ratio of SiO2/M2O 1.6 - 4, and inorganic product, inert with respect to the silicate, and the above-mentioned inorganic product is 5 to less than 55% by weight, based on dry weight, and the weight ratio, residual water associated with the silicate/silicate, calculated on the dry weight above or equal to 33/100, preferably 36/100. Use a structure-forming agent in detergent compositions, mainly in powder detergent compositions, especially Laundry and dishwashers. 3 S. and 7 C.p. f-crystals, 1 table.

The invention relates to modifying additive for detergent compositions based on alkali metal silicate and sodium carbonate, to its preparation and to a spherical agranular on the basis of hydrated alkali metal silicate and sodium carbonate. This modifier additive is intended, in particular, for powdered detergents used for washing clothes or dishes.

It is necessary that the modifying agent had the effect of softening the water used for washing or cleaning. Therefore, he must remove the calcium and magnesium present in water in the form of soluble salts, and contaminants in the wash - in the form of more or less soluble complexes. The removal of calcium and magnesium can be done either by ion exchange or by deposition. If the removal is carried out by deposition, it should be adjusted in such a way as to avoid the formation of scale on linen or on elements of washing machines.

Deposition regulate the use of water-soluble polymers having affinity for calcium and magnesium.

In addition, the modifying agent should give surfactant emulsifying effect against fatty impurities and dispersing effect in relation to the "pigment" of contamination, such as metal oxides, aluminum oxide, silicon dioxide, various dust, humus, limestone, carbon black.

This dispersive effect is usually achieved by having polianionov creating a high density of negative charges on the surface of the partition.

It is also necessary to modifying di, by increasing the size of the micelles.

It is also necessary that she brought ions of HE-for the saponification of fats and to increase the negative surface charges on textile surfaces and dirt.

Silicates have long been known as a good detergent additives, however, currently in the washing compositions that do not contain phosphates, they are rare.

The most used silicates are the alkali metal silicates with a molar ratio of SiO2/Na2O = 1.6-2.7.

They are available for sale either in the form of concentrated solutions containing approximately 35-45 wt.% dry extract or in the form of finely ground or compact powders.

Concentrated solutions of silicate is introduced into the aqueous suspension of liquor, including other components of the liquor. The suspension is then dried by spraying. Silicate, powdered and dried in conjunction with other components, contains only about 25% and even less than the associated water relative to its dry weight.

Powder silicate obtained by drying by spraying concentrated solutions of glassy silicate, however, to ensure a good tx2">

However, it was found that, when dissolved silicate powder in a washing bath with a concentration of 1 - 3 g/l, it has a low-modifying properties.

This is because the powder dissolved silicate forms mainly silicon-containing monomers of the formula:

Si(Oh)4,

where X is H or Na, which do not have a modifying effect. However, such monomers can again be interconnected with the formation of polianionov, if the concentration of the silicate is at least 50 - 500 g/l, with a very slow speed.

Such concentrations of silicate, and the slow kinetics of the polymerization of the monomers is incompatible with the conditions and duration of the washing or washing clothes.

The above disadvantage in relation to powders containing 19 - 22% of chemically bound water, also applies to detergent compositions containing silicate with about 25% of bound water (relative to the dry silicate obtained by the introduction of a concentrated solution of silicate in aqueous suspension of liquor, followed by drying.

Known from patent application Japan N 59-18114 modifying agent in the form of granules on the basis of a carbonate of an alkali metal and silico aqueous solution of sodium silicate with a concentration of 30-55 wt.% sprayed on the powder of carbonate of alkaline metal in a fluidized layer, to obtain a ratio of the carbonate/silicate, equal to 95/5 - 50/50 by drying at 200oC. Under these conditions, drying the remaining amount of water associated with the silicate, relative to the dry silicate does not reach the ratio 33/100. However, this modifier additive inherent in the same drawback associated with the low content of polyanionic forms of silicon, when dissolved silicate, leading to relatively long washing or washing.

Studies have shown that if the dissolved alkali metal silicate enriched silicon atoms in the forms of Q2and Q3located in polianionov, these forms have a shelf life sufficient to silicates could play the role of a "modifier" in the detergent when their concentration in the liquor to 1-3 g/L.

The expression "the silicon atoms in the forms of Q2and Q3" indicates the degree of Association of silicon atoms among themselves; so

"Q2" indicates that each silicon atom is involved in the formation of two relations

-Si-O-Si-,

and the other two communication end group

-Si-O-X,

where X represents an alkali metal or H,

"Q3" indicates that each silicon atom is involved in the formation of three links

-Si-O-Si-,

leaving a relationship is the end

-S
the remaining three connection end group

Si-O-X;

but the form "Q0" means that each silicon atom is involved only in relationships

Si-O-X

(i.e., corresponds to the monomer).

The objective of the invention is to improve modifying the properties of known additives.

This task is solved by modifying additives for detergent compositions based on sodium carbonate and silicate of an alkali metal, characterized in that it contains in the form of soprano sodium carbonate and an aqueous solution of alkali metal silicate with a molar ratio of SiO2: M2O, is equal to - 1.6-4, where M is alkali metal, with a ratio of wt.% per dry weight:

Sodium carbonate - 5 - 55

The alkali metal silicate To 100

and the mass ratio of water associated with the silicate, the silicate in the calculation of its dry weight, equal to or more than 33:100, preferably, equal to or exceeding 36:100.

By "associated" with silicate water see water above aqueous solution, which is not combined with sodium carbonate, i.e. which is not in the form of hydrate crystallization.

The ratio of residual water associated with the silicate, silicate, calculated on the dry weight, above the s limit of this ratio, which corresponds to the extent in which the silicate is maintained in a flowable powder form, i.e., in the form used in the detergent. As the upper value of the weight ratio of the residual associated with the silicate of water to silicate calculated on the dry weight can be considered as the value is less than or approximately equal to 120/100.

The high content of silicate in the products according to the invention improves antinociceptive properties and reduces the satisfactory formation of scale on linen or washing machines parts.

Modifying additive may contain instead of sodium carbonate other water-soluble mineral substance inert to the silicate. As examples of these substances include sodium sulfate, sodium borate, perborate sodium, metasilicate sodium, phosphates or polyphosphates, such as trisodium phosphate, sodium tripolyphosphate.

Mineral product is administered either directly in an aqueous solution of alkali metal silicate, or water, and then mixed with an aqueous solution of alkali metal silicate.

Structure-forming additive according to the invention may be in any form as a solid (powder, granules) and in the liquid.

According to a preferred variant of the modifying additive is formed an aqueous solution of alkali metal silicate containing about 10-60 wt. %, preferably 35-50 wt.% silicate of alkali metal, calculated on the dry weight, namely sodium silicate or potassium.

A concentrated solution of alkali metal silicate used for modifying additive is preferably produced by dissolving in water "liquid glass" in an autoclave under pressure at 140oC, then a possible dilution.

The invention relates also to a method for modifying additives for detergent compositions in the form of soprano based on sodium carbonate and silicate of an alkali metal, comprising a mixture of alkali metal silicate and sodium carbonate, and granulating the mixture, and wherein the mixing and granulation is performed by spraying with 20 - 95oC mixture of an aqueous solution of alkali metal silicate with a molar ratio of SiO2: M2O, is equal to 1.6 to 4, preferably 1.8 to 3.5, and sodium carbonate, the content of which is 5 to 55% of the total number of silicate and carbonate based on the dry weight on a roller in a rotating granulator at 15 - 200the th composition, identical composition pulverisateur mixture at a mass ratio of the particles of water associated with the silicate, the silicate in the calculation of its dry weight, equal to or more than 33:100, followed, if necessary, drying the obtained soprano, and granulation and drying are carried out so that the mass ratio in agranular water associated with the silicate, the silicate in the calculation of its dry weight was equal to or more than 33:100.

Such degranol silicate and carbonate conveniently and easily incorporated into detergent compositions.

Under "product particles having a composition identical to the composition pulverisateur mixture" refer to particles containing alkali metal silicate and carbonate of alkaline metal constituting 5-55% by weight, based on dry weight, with the weight ratio of the residual water associated with the silicate, silicate, calculated on the dry weight above or equal to 33/100.

These particles can be obtained by any known method. So, they can be obtained by drying the solution, identical aqueous solution comprising silicate and carbonate of an alkali metal, above. This drying is adjusted so that the resulting product of the weight ratio of the residual water, svyazyvayuschaya layer of particles, having a composition identical to pulverisateur mixture, you can also get if you download the first dry mixture of carbonate to silicate, in which the mass ratio of the carbonate/silicate identical pulversheim solution, and to upgrade to the full replacement of this layer obtained by degranulate (recirculation).

The original aqueous solution of silicate and carbonate formed by a mixture of aqueous concentrated solution of alkali metal silicate with a molar ratio of SiO2/M2O the order of 1.6-4 and sodium carbonate, which may be in liquid or solid form.

In aqueous solution, formed by the mixture of silicate carbonate aqueous concentrated solution of alkali metal silicate has a weight ratio associated with the silicate of water to silicate, calculated on the dry weight above or equal to 33/100, preferably 36/100.

Preferably, the freshly formed degranula subjected to the operation of the seal.

According to a preferred variant of the silicate solution used during retrieval of soprano contains a silicate of an alkali metal in an amount of 10-60%, preferably 35-50 wt.% calculated on dry weight.

Spraying the aqueous solution on the basis of the mixture and liquids) with air under pressure at temperatures of the same order, i.e., 20 - 95oC, preferably 70 to 95oC.

Used carbonates can be of normal quality. Preferably use carbonates, which dissolve easily and which have a high adsorbing/absorbing ability.

The limit of absorbing and/or adsorbing ability of the above-mentioned inorganic products, in particular carbonates, may be determined by known methods, for example, by measuring the change in the angle of natural slope to the base of the mound, depending on the amount of the applied solution of the silicate.

Device for granulating can be any device type of the rotating plate, a pelleting machine, dryer, mixer-granulator.

The first preferred method of obtaining soprano is to use a rotating granulator, allowing it to condense in a thin layer of particles. Especially preferred pelleting device having an inclined axis of rotation with respect to horizontal at an angle above the 20opreferably above 40o; their configuration can be very different: in the shape of a truncated cone, flat, manual or a combination of these three forms.

The second preference for the leaves of at least 3% and preferably at least 5%.

Particles from a mixture of the carbonate/silicate condensed at a temperature of about 15 to 200oC, preferably about 15 to 120oand preferably of the order of 15 - 30oC.

The number pulverizing solution based on a mixture of the silicate/carbonate and the number of used particles from a mixture of the silicate/carbonate correspond to the ratio of the flow rate/flow rate of particles (coefficient wettability) of 0.05 - 0.8 l/kg, preferably 0.1 - 0.5 l/kg, and preferably 0.15 - 0.3 l/kg, based on the sodium salt.

Consumption pulverizing solution, the velocity of the particles and the thickness of the moving layer of particles such that each particle absorbs liquid and aglomerated with the particles with which it comes in contact with the formation of plastic, not paste-like granules.

The velocity of the particles and the layer thickness is regulated through a feed rate of the particles in the device for pelleting and characteristics of that device.

The residence time of particles in the device type plate or drum is typically of the order of 15-40 minutes

The sealing operation is carried out at room temperature by skating in a rotating device of freshly formed soprano.

Mixer-granulators are also well suited for the operation of the seal.

Operations agrolivre and seals, therefore, can be implemented in the same device, for example in a pelleting device of stepped configuration, and the seal soprano occurs by riding above soprano at the last stages of the apparatus; similarly, these two operations can be implemented in two-drum.

Degranula, if necessary, compacted, can be dried by any known method. Especially preferred method is drying in the fluidized bed using air flow at a temperature of about 40 - 90oC, preferably 60-80oC. the Duration of this operation depends on the air temperature, the water content in agranular at the outlet of the granulating device and the desired water content in the dried agranular and Alimatov sodium and sodium carbonate, obtained by the above method, which differ in that they contain: a silicate of alkaline metal such as sodium or potassium, with a molar ratio of SiO2/M2O the order of 1.6 - 4 adsorbed and/or absorbed on the carbonate of an alkali metal, and the carbonate is 5-55 wt.% by weight of silicate adsorbed and/or absorbed on the carbonate, and the mass ratio of residual water associated with the silicate, silicate, calculated on the dry weight, or equal to or more 33/100, preferably 36/100, bulk density without seals is 0.4 -1.5 g/cm3preferably 0.5 -1.5 g/cm3, and preferably 0.75-1 g/cm3and the average diameter equal to 0.4 -1.8 mm, preferably 0.5-0.8 mm, deviation type log100.02 to 0.5, preferably 0.05 - 0.3.

Preferably the mass ratio of residual water associated with the silicate, silicate, calculated on the dry weight should be less than or equal to about 120/100.

The above method allows to obtain degranula on the basis of hydrated alkali metal silicates and carbonates of alkali metals, quickly soluble in water.

Thus, the speed of dissolution in water of 90 and 95% of soprano according izobreteniya time necessary for dissolution of 90 or 95% of the product at a concentration of 35 g/l in water at 20oC.

If the modifying agent is in the form of powder or granules, it is used in detergent compositions for washing dishes in the number 3-90 wt. %, preferably 3-70 wt.%, by weight of the above compositions, in compositions for washing clothes, her number is about 3-60%, preferably about 3-40% by weight of the above compositions (these quantities are expressed per weight of dry silicate relative to the weight of the composition).

Along with modifying additive in the detergent composition is at least one surfactant in the amount of 8 - 20%, preferably 10-15%, by weight of the above composition.

Of these surfactants can be called:

anionic surfactants of the type Soaps of alkali metals, alkaline salts of fatty acids (C8- C24), alkali sulfonates (alkylbenzenesulfonate C8- C13, alkyl sulphonates C12- C16), fatty alcohols (C6- C16, ethoxylated and sulfated; ALKYLPHENOLS C8- C13, ethoxylated and sulfated; alkaline sulfosuccinic ethyleneamine ALKYLPHENOLS C6- C12, acetyltyrosine aliphatic alcohols C8- C22, block copolymers of ethylene oxide with propylene oxide, in certain cases polyoxyethylenated of carboxamido,

amphoteric surfactants of type alkyldiphenylamine,

cationic surface-active substances such as chlorides or bromides of alkyltrimethylammonium, alkyldimethylbenzylammonium.

In addition, the detergent composition may contain other components, such as

the modifying agents of type:

phosphates in amounts of less than 25% of the total weight of the composition,

zeolites approximately 40% of the total weight of the formulation,

sodium carbonate to about 80% of the total weight of the composition,

nitriloside acid to approximately 10% of the total weight of the composition,

citric acid, tartaric acid to approximately 50% of the total weight of the composition, and the total amount of modifier is about 0.2-80%, preferably 20-45%, of the total weight of the above detergent compositions,

bleach type perborates, percarbonates, chloroisocyanurates, N,N,N', N'-tetraacetylethylenediamine (TAED), up to about 30% of the total weight of the above detergent compositions,

preventing ukazannoi detergent composition,

agents that prevent the formation of scale type copolymers of acrylic acid with maleic anhydride in an amount up to about 10% of the total weight of the above detergent compositions,

type additives sodium sulfate for powdered detergent compositions in an amount up to 50% of the total weight of the above composition.

Example 1. Obtaining modifying additives

Use the following starting materials:

sodium silicate: a solution with a molar ratio of SiO2/Na2O = 2.8

dry extract: 45 wt.%

density: 1.500

The distribution of polyanionic forms (in molar percent silicon):

Q0= 0.8%,

Q1= 6.2%,

Q2and Q3= 83%,

Q4= 10%,

sodium carbonate: anhydrous powder.

Bulk density without seals: 1.1 g/cm3.

Grain size distribution: d50= 0.5 mm

Pre-dissolved sodium carbonate is introduced into the sodium silicate solution, heated to 80oC, under stirring. The addition of water in the sodium carbonate in this case allows to obtain a mixed solution, the dry extract of which is identical to the dry extract solution of the original silicate. Mixing carry out thus, Thu the config solution is dried in a drying Cabinet in a thin layer at 20oC for 20 h Obtained solid is then crushed using a crusher Forplex. The first stage consists in drying in the fluidized bed at 30-40oC to obtain a solid material of the following composition: sodium carbonate is 30% of the total weight of the silicate and carbonate based on the dry weight, the weight ratio of the residual water associated with the silicate, silicate, calculated on the dry weight, as well 49.7/100.

The product has the following characteristics:

Bulk density without consolidation: 0.8 g/cm3.

Grain size distribution:

d50= 0.5 mm,

d10= 0.1 mm,

d90= 1 mm

Dissolution: in less than 4 min dissolves 99% of the product (conductometric measurement of aqueous solution with 3 g/l of the product at 20oC.

Komleksoobrazuyuschee the ability of calcium: 197 mg CaCO3per gram of anhydrous product. This complexing ability is assessed by measuring the concentration of residual calcium at time t = 15 min, and the test product is administered at time t = 0 in a solution of known concentration of calcium (superyoung to pH 10 solution).

Example 2. Getting soprano

Used products are the following:s%

density: 1.45 g/cm3< / BR>
Powdered silicate:

the molar ratio of SiO2/Na2O = 2.05

dry extract = 20%

density = 0.55 g/cm3< / BR>
grain size distribution: d50= 0.12 mm

Sodium carbonate: easy:

density = 0.6 g/cm3< / BR>
grain size distribution: d50= 0.12 mm

A solution of 38 wt.% carbonate (calculated on the dry weight of silicate and carbonate) obtained when 80oC by mixing the carbonate solution with a solution of silicate with a ratio of 2. Dry extract of the mixed solution thus obtained is 37.7%.

Granulation of this solution is carried out in a drum with a length of 1300 mm and 500 mm in diameter, which rotates at a speed of 20 rpm Granulation starts with the bottom layer consisting of a powdered mixture of light carbonate and powdered silicate with a ratio of 2. The composition of the carbonate-silicate mixture is the same as a mixed solution. Granulation is carried out in the first part of the drum, where the solution pulverized through a nozzle on the powder layer. The drying carried out in the second part of the drum, equipped with lifts and blown hot air in counterflow.

Granulation, compaction and drying, sledovatelnot drum, after crushing and sieving fractions 0.2 - 1.25 mm Thus, in the prescribed mode, i.e. when the initial bottom layer is updated with the newly received products, granulating the following:

Feeding a mixed solution of 6 - 8 l/h

Supply of powder (recirculation) - 50 kg/h

The coefficient of the wettability - 1.12 - 0.16 l/kg

The air supply for drying - 110 - 120 m3/h

The temperature of the drying air - 105 - 110oC

The residence time in the drum (medium) - 30 - 40 min

So get degranula, the characteristics of which are the following:

the ratio, calculated on the dry weight of the carbonate/silicate = 38/62

the ratio of water associated with the silicate/silicate, calculated on the dry weight: 51/100

bulk density without seals = 0.89 g/cm3< / BR>
grain size distribution:

d50= 0.45 μm,

d95= 0.8 mm,

deviation type log10= 0.37

The obtained granules have the following time of dissolution:

90 wt. % the product is dissolved in 50 (aqueous solution with a concentration of 35 g/l at 20oC)

95 wt. % the product is dissolved in 67 (aqueous solution with a concentration of 35 g/l at 20oC)

99 wt. wt.% the product is dissolved at 154 (aqueous solution with concentration is Licata, component at the beginning of the base layer, which is not consistent with the present invention, has the following time of dissolution:

90 wt. % the product is dissolved in 55 (aqueous solution with a concentration of 35 g/l at 20oC)

95 wt.% the product is dissolved for 108 (aqueous solution with a concentration of 35 g/l at 20oC)

99 wt.% the product is dissolved at 266 (aqueous solution with a concentration of 35 g/l at 20oC).

Complexing ability of calcium: 243-249 mg CaCO3per gram of anhydrous product. This complexing capacity is estimated in the same way as in example 1.

Example 3. Getting soprano

Method of granulating the same as in example 2, but the pellet mill operates in open loop, i.e., load it with a mixture of dry carbonate/powdered silicate and mixed with a solution, but without recirculation of the obtained product. Also, there is a simultaneous drying.

Parameters granulating the following:

Feeding a mixed solution of 6 - 8 l/h

Supply of powder - 30 kg/h

The wetting coefficient - 0.2 - 0.27 l/kg

Air consumption for drying: - 110 - 120 m3/h

The temperature of the drying air: - 105-110oC

Average duration of stay in baraw based on dry weight:

the carbonate/silicate = 37/63,

the content associated with the silicate of water relative to the silicate, calculated on the dry weight = 42/100,

bulk density without seals = 0.54 g/cm3,

grain size distribution:

d50= 0.57 mm,

d95= 0.78 mm,

deviation type log10= 0.12.

The obtained granules have the following time of dissolution:

90 wt. % the product is dissolved in 55 (aqueous solution with a concentration of 35 g/l at 20oC)

95 wt.% the product is dissolved 122 (aqueous solution with a concentration of 35 g/l at 20oC)

99 wt.% the product is dissolved in 300 (aqueous solution with a concentration of 35 g/l at 20oC).

Complexing ability of calcium: 245 mg CaCO3per gram of anhydrous product. This complexing capacity is estimated in the same way as in example 1.

These degranulate administered by mixing in the dry state with additives to obtain the following composition for washing clothes:

Composition for washing - wt. parts

The obtained pellets - 40

Sokalan CP5(the copolymer, BASF) - 4.8

Tixolex 25(the amorphous silico-aluminate, rhône-Poulenc) - 5

The sodium sulfate - 7

TIED - 5

LAB (80%)- 6

Synperonic - 0.2

Tinopal SOP(bleach company Ciba-Geigy) - 0.2

The non - 2.5

Carboxymethylcellulose - 2

Test results contaminant removal implement in the washing machine FOM 71r, firms WASCATOR.

Conditions of the experiments the following:

used cycle 60oC,

the total cycle time of 70 min, without pre-washing,

the number of cycles 3 wash solution,

water hardness 32o(determined on hydrotime made in France),

download lingerie 3.5 kg rags of white cotton

subjects fabric, washing enter prichalivaya pin on the rags, the two groups following fabrics.

Grey cotton: factory test, Krefeld 10 C, IEC 106, EMPA 101

Polyester/grey cotton: factory test, Krefeld 20 C, EMPA 104

Protein stains: blood (EMPA 111), cocoa (EMPA 112), mixed (EMPA 116)

Oxidizable stains, tea (Krefeld, 10 g), unbleached cotton (EMPA 222), wine (EMPA 114)

The dose of washing powder:

for the 1st group of 5 g/l, or 5 x 20 = 100 g per wash,

for the 2nd group of 8 g/l, or 8 x 20 = 160 g per wash.

Measurement method of removing dirt and stains

Photometric measurement (measuring the amount of reflected light cloth) enable caters whom shall be expressed by the formula:

,

where A = the reflectivity of the white control sample,

In = the reflectivity of contaminated control sample,

C = reflectivity dirty sample after washing.

Reflectivity is determined using trichrome blue components, without affecting optical brighteners.

The number of performed measurements on the sample = 4

The number of samples of linen = 2

The number of washings = 3

Or 4 x 2 x 3 = 24 dimensions in the study of pollution, product and concentration.

Test on the elimination of scale in the washing machine is carried out in a machine with a drum SCHULTESS SUPER 6 DE LUXEr.

Conditions of the experiments the following:

used cycle 60oC,

the total cycle time 65 min, without pre-washing,

the number of cycles 25 combined washings,

water hardness 21.2o(determined on hydrotime made in France),

used tested fabric - control tape, exactly meet the specifications set forth in the NPT norm 73.600,

download linen, 3 kg of Terry towels made of 100% cotton

dose of the powder 5 g/L.

The dried samples after 25 washings; weigh them, and burn them at 900o

Comparative example 4. Getting soprano

Device for granulating consists of a drum rotating at a speed of 40 rpm, is identical to that described in example 2. The output aperture is set so that the residence time of the particles was about 15 - 20 minutes

The drum continuously served with a flow rate of 37 kg/h powder carbonate, having the same characteristics, such as powders of example 2.

This powder, a rotating drum, using air at a temperature of 80oC, through a nozzle with two holes for liquids with a flat nozzle, located in the first third of the drum, pulverized solution of silicate, similar to that of example 2, 80oC with a flow rate of 18 l/h

Degranula at the outlet of the drum is at room temperature and have a density of 0.68 g/cm3.

Degranula then periodically condense within one hour in a rotating drum with smooth walls with a diameter of 500 mm, a length of 1300 mm and a slope of 5%.

The drum speed is 20 rpm

The thus obtained granules are dried in the fluidized bed at a temperature of about 65oC (the temperature of the air for fluidization is equal to 70oC) in tsukai weight: carbonate/silicate = 66/34,

the content of water associated with the silicate, the silicate per dry weight = 61/100.

Complexing ability of calcium: 285 mg CaCO3per gram of anhydrous product. This complexing capacity is estimated in the same way as in example 1.

Granules have excellent stability during storage.

These degranula administered by mixing in the dry state with additives to obtain a composition for washing clothes, identical to the one described in example 4 (except degranula).

Tests results remove dirt and residue also performed with the same detergent composition.

The results are presented in the table.

1. The modifying additive for detergent compositions based on sodium carbonate and silicate of an alkali metal, characterized in that it contains in the form of soprano sodium carbonate and an aqueous solution of alkali metal silicate with a molar ratio of SiO2M2O, 1,6 4,0, where M is alkali metal, at a ratio of wt. calculated on dry basis:

Sodium carbonate 5 55

The alkali metal silicate To 100

and the mass ratio of water associated with the silicate, and silicate in the calculation of its dry weight, equal and shall actor of alkali metal silicate contains a silicate of an alkali metal in an amount of 10 to 60 wt. in the calculation of dry weight, preferably in amounts of 35 to 50 wt.

3. Additive for PP.1 and 2, characterized in that the mass ratio of water associated with the silicate, and silicate in the calculation of its dry weight not exceeding 120 100 and the molar ratio of SiO2M2O is 1.8 to 3.5, where M is alkali metal.

4. The method of obtaining modifying additives for detergent compositions in the form of soprano based on sodium carbonate and silicate of an alkali metal, comprising a mixture of alkali metal silicate and sodium carbonate, and granulating the mixture, wherein the mixing and granulation is performed by spraying at a temperature of 20 95oWith a mixture of an aqueous solution of alkali metal silicate with a molar ratio of SiO2M2O of 1.6 to 4.0, preferably of 1.8 to 3.5, and sodium carbonate, the content of which is 5 55 of the total number of silicate and carbonate based on the dry mass, rolling in a rotating granulator 15 200oWith, preferably 15 120oC, more preferably at 15 to 30oWith, a layer of particles of a product having a composition identical to the composition pulverisateur mixture at a mass ratio of the particles associated with the silicate water and silicate in the calculation of its dry and the drying is carried out so that to mass ratio in agranular water associated with the silicate, and silicate in the calculation of its dry weight was equal to or more than 33 100.

5. The method according to p. 4, characterized in that the used solution of alkali metal silicate containing alkali metal silicate in an amount of 10 to 60 wt. in the calculation of dry weight, preferably in amounts of 35 to 50 wt.

6. The method according to PP. 4 and 5, characterized in that the particles of the rolling layer is produced by drying a solution identical in composition water pulversheim solution.

7. The method according to PP.4 to 6, characterized in that in a rotating granulator using a pelleting device.

8. The method according to PP.4 to 7, characterized in that the granulation is performed with the use of drum.

9. The method according to PP.4 to 8, characterized in that the PCI solution used in the ratio of its number to the number of particles, 0.05 to 0.8 l/kg, based on sodium.

10. Spherical degranula on the basis of hydrated alkali metal silicates and sodium carbonate, characterized in that they contain an alkali metal silicate with a molar ratio of SiO2M2O 1,6 4,0, adsorbed and/or absorbed on Carbo and silicate in the calculation of its dry weight is equal to or more than 33 100, the bulk density of the granules without seals is 0.4 to 1.5 g/cm3and the average diameter of 0.4 to 1.8 mm

 

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The invention relates to a technology for production of liquid glass and helps to ensure the efficient use of waste tonnage production of crystalline silica - fume

The invention relates to the production of liquid glass and can be used in chemical, construction, textile and other industries

The invention relates to the field of inorganic chemistry, in particular to a method of production of sodium silicate (silicate-block) with different silicate module of the high-silica rocks, used in glass, light and other industries, and can also be used in the production of building materials, zeolites, catalysts, etc
The invention relates to the field of liquid glass used in construction

The invention relates to techniques for the production of soluble silicates and can be used in the technology of production of construction materials, ceramic products, in the production of heat and sound insulation materials and for other purposes

The invention relates to a technology for production of liquid glass used in many industries, in particular in the production of zeolites and catalysts, construction materials, silicate paints, adhesives, sealants and adhesives chemicals, insulation materials, detergents

The invention relates to a technology for production of liquid glass, which is widely used in many industries, in particular in the construction industry to obtain slag binders, acid-resistant and heat-resistant materials, silicate paints, etc
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