WO1995033684A1 - Silicate alcalin contenant de l'acide silicique granule et soluble dans l'eau - Google Patents

Silicate alcalin contenant de l'acide silicique granule et soluble dans l'eau Download PDF

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Publication number
WO1995033684A1
WO1995033684A1 PCT/EP1995/002015 EP9502015W WO9533684A1 WO 1995033684 A1 WO1995033684 A1 WO 1995033684A1 EP 9502015 W EP9502015 W EP 9502015W WO 9533684 A1 WO9533684 A1 WO 9533684A1
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Prior art keywords
alkali metal
range
acid
weight
silicate
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PCT/EP1995/002015
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German (de)
English (en)
Inventor
Volker Bauer
Jochen Jacobs
Jost SCHÜRTZ
Kurt Czok
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Henkel Kommanditgesellschaft Auf Aktien
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Priority to AU27365/95A priority Critical patent/AU2736595A/en
Publication of WO1995033684A1 publication Critical patent/WO1995033684A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/32—Alkali metal silicates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/06—Powder; Flakes; Free-flowing mixtures; Sheets
    • C11D17/065—High-density particulate detergent compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/08—Silicates

Definitions

  • the invention relates to a granulated, water-soluble, silicic acid-containing alkali silicate with a bulk density in the range between 500 and 1200 g / l, the aqueous solution of which has an adjustable turbidity, and a process for its preparation. It is particularly suitable as a builder for detergents and cleaning agents.
  • hydrated water-soluble silicates can be obtained in powder form by spray or roller drying of water glass solutions and still contain about 20% by weight of water. (Compare Ullmann's Encyclopedia of Technical Chemistry, 4th edition 1982, Volume 21, page 412). Such products are commercially available for various purposes.
  • Klett number can be used, for example, as a measure of the cloudiness of the solution (see Ullmanns Enzyclopadie der Technische Chemie, 4th edition 1982, volume 22, page 504).
  • the principle of determination of the Klett number is based on the fact that the extinction of light as it passes through the solution of the test substance is measured photometrically directly.
  • Alkali metal silicate granules with such bulk densities can be obtained, as described in EP-A-526978, by introducing an alkali metal silicate solution with a solids content between 30 and 53% by weight into a heated drum, one in the longitudinal axis Shaft rotates with a plurality of arms close to the inner surface of the drum, the drum wall having a temperature between 150 and 200 ° C and the drying process is supported by a gas fed into the drum with a temperature between 175 and about 250 ° C. This process gives a product whose average particle size is in the range between 0.2 and 2 mm. Heated air is preferably used as the drying gas.
  • drying gas is not critical, it must not react with the silicate solution. This restriction excludes, for example, the use of carbon dioxide in the drying gas, since this reacts with the silicate solution to release silica.
  • the object of the invention is to provide water-soluble amorphous alkali metal silicates which have a high bulk density and whose aqueous solution is clearly clouded by the presence of dispersed, finely divided silica.
  • the finely divided silica is expected to serve as a crystal seed for the growth of silicate precipitates (Ca and Mg silicates) and thereby to help reduce the incrustation of fibers when washing fabrics.
  • Such products are particularly suitable for use in detergents and cleaning agents: in which at least 60% by weight of the silicate particles have a particle size between 0.1 and 1.6 mm.
  • Preferred bulk density values are between 700 and 1100 g / l.
  • amorphous means "X-ray amorphous”. This means that the alkali metal silicates do not provide sharp reflections in X-ray diffraction images, but at most one or more broad maxima, the width of which is several degree units of the diffraction angle. However, this does not rule out the possibility that areas are found in electron diffraction experiments which give sharp electron diffraction reflections. This is to be interpreted in such a way that the substance has microcrystalline areas in a range of up to approximately 20 nm (max. 50 nm).
  • Sodium and / or potassium silicates are particularly suitable as alkali metal silicates.
  • Sodium silicates are preferred for economic reasons. If, however, importance is attached to particularly rapid water solubility for reasons of application technology, it is advisable to at least partially replace sodium with potassium.
  • the composition of the alkali metal silicate can be chosen so that the silicate has a potassium content, calculated as K2O, of up to 5% by weight.
  • the invention relates to a process for the production of granulated alkali metal silicate with a SiO 2 • 2O molar ratio between 1.6: 1 and 3.4: 1 and a bulk density in the range from 500 to 1200 g / 1, the 1% by weight of which aqueous solution has a Klett number in the range between 6 and 100, preferably 10-40, characterized in that a water glass solution with a corresponding molar ratio SiO 2: M2O in a drum with a wall heated to a temperature between 150 and 250 ° C in the presence introduces a gas mixture brought to 200 to 400 ° C, which contains between 0.05 and 10 vol% CO2, and by means of a in the drum with a peripheral speed between 15 and 25 m / sec.
  • the aggregates described in EP-A-526978 and EP-A-542131 are particularly suitable for this.
  • the solids content of the water glass solution fed into the drying unit is to be chosen so that a tough plastic stage of the alkali metal silicate is passed through during drying, whereby the desired high bulk density and the desired grain spectrum can be achieved.
  • solids contents of between 30 and 75% by weight of the water glass solution fed in are suitable.
  • the process can also be carried out in two stages, with a less concentrated water glass solution, for example with a solids content of between 30 and 55% by weight, being fed in for preconcentration in the first stage and wall and gas temperature of the drying day for rapid evaporation of water ⁇ sets gregates high, for example the wall temperature in the range between 200 and 250 ° C and the gas temperature in the range 300 to 400 ° C.
  • the pre-concentrated, pasty but still flowable silicate solution which may have a solids content of between 55 and 75% by weight, for example, is fed into a second drying unit operated at lower temperatures.
  • the wall temperature of the drying unit can be, for example, between 150 and 200 ° C, and that of the gas between 200 and 300 ° C.
  • the flue gas obtainable from the combustion of fossil fuels or synthetic or biogenic carbon-containing fuels with oxygen-containing gas, preferably with air, can be used as the gas mixture.
  • Gas mixtures whose CO 2 * content is between 1 and 5% by volume are particularly suitable as the drying medium.
  • the products according to the invention accordingly have a much better secondary washing power than analogous silica-free products according to the prior art, without the primary washing power being adversely affected. It has been found to be essential that the silica particles are embedded in the silicate matrix in the products according to the invention, so that they are available as nuclei at the moment of dissolution of the silicate matrix, that is to say at places of high silicate concentration. Similar incrustation-inhibiting effects are in fact not observed when a clear water-soluble alkali metal silicate is mixed with silica obtained by precipitation or pyrogenic.
  • the invention relates to the use of the alkali metal silicates according to the invention, which are obtainable in the ways described above, as corrosion protection and / or builder components in detergents and / or washing processes for textile washing, in machine dishwashing detergents and / or cleaners for hard surfaces.
  • the anti-corrosive action of the agents according to the invention manifests itself particularly in relation to metallic surfaces.
  • the use according to the invention takes place in the presence of further components required for washing and cleaning purposes.
  • Such components include, in particular, surface-active substances such as nonionic and / or anionic surfactants of fat and / or oliochemical origin, and, depending on the application, further auxiliaries such as bleaching agents, protein and / or starch-splitting enzymes, optical brighteners, complexing agents , further builder components such as phosphates and optionally further components known to the person skilled in the art.
  • surface-active substances such as nonionic and / or anionic surfactants of fat and / or oliochemical origin
  • further auxiliaries such as bleaching agents, protein and / or starch-splitting enzymes, optical brighteners, complexing agents , further builder components such as phosphates and optionally further components known to the person skilled in the art.
  • the alkali metal silicates according to the invention are preferably used in such a way that a solid mixed product / cogranulate is produced which contains, in addition to the alkali metal silicates according to the invention, individual or mixtures of further active and auxiliary components.
  • the ready-to-use washing or cleaning liquor is created by dissolving this solid mixed product in water.
  • the agents according to the invention can also be used as so-called modular components by adding them separately from the other active ingredients and auxiliaries to the washing or cleaning solution.
  • the alkali metal silicates according to the invention can also be loaded with other liquid or easily meltable detergent ingredients, preferably nonionic surfactants, for use as components in detergents and cleaning agents.
  • mixture components that can be used in conjunction with the alkali metal silicates according to the invention is given without any claim to completeness.
  • the entire area of valuable and auxiliary materials from the field of washing and cleaning agents is available.
  • surfactants of anionic, nonionic, cationic, amphoteric and / or zwitterionic structure as well as further inorganic and / or organic builder substances, bleaching agents and bleach activators, enzymes and enzyme stabilizers, foam inhibitors, optical brighteners, inorganic alkaline and / or salts which react neutral in water, for example sulfates or chlorides, and colorants and fragrances.
  • Preferred surfactants of the sulfonate type are the known C9-C13-alkylbenzenesulfonates, olefin sulfonates and alkanesulfonates.
  • Esters of oc-sulfofatty acids or the disalts of ⁇ -sulfofatty acids are also suitable.
  • Other suitable anionic surfactants are sulfonated fatty acid glycerol esters, which are mono-, di- and triesters and their mixtures, such as those produced by esterification by a monoglycerol with 1 to 3 moles of fatty acid or in the transesterification of triglycerides with 0.3 to 2 moles of glycerol be preserved.
  • Suitable surfactants of the sulfate type are the sulfuric acid monoesters from primary alcohols of natural and synthetic origin, in particular from - 8 - fatty alcohols, e.g. from coconut fatty alcohol, tallow fatty alcohol, oleyl alcohol,
  • the Schwefelkladmonoester the ethoxylated with 1 to 6 moles of ethylene Al ⁇ alcohols such as 2-methyl-branched Cg-C j i-alcohols having an average of 2 or 3.5 moles of ethylene oxide are suitable.
  • Preferred anionic surfactant mixtures contain combinations of alk (en) yl sulfates, in particular mixtures of saturated and unsaturated fatty alcohol sulfates, and alkylbenzenesulfonates, sulfated fatty acid glycerol esters and / or ⁇ -sulfofatty acid esters and / or alkyl sulfosuccinates.
  • Mixtures are particularly preferred which contain alk (en) yl sulfates and alkylbenzenesulfonates and optionally methyl oc-sulfofatty acid and / or sulfated fatty acid glycerol esters as anionic surfactants.
  • Suitable anionic surfactants are, in particular, soaps, preferably in amounts below 5% by weight.
  • Saturated fatty acid soaps are suitable, such as the salts of lauric acid, myristic acid, pal itic acid or stearic acid, and in particular from natural fatty acids, e.g. Coconut, palm kernel or tallow fatty acids, derived soap mixtures.
  • Unsaturated fatty acid soaps, which are derived, for example, from oleic acid, may also be present, but their proportion of the soaps should not exceed 50% by weight.
  • anionic surfactants and soaps can be present in the form of their sodium, potassium or ammonium salts and as soluble salts of organic bases, such as mono-, di- or triethanolamine.
  • the anionic surfactants are preferably in the form of their sodium or potassium salts, in particular in the form of the sodium salts.
  • the content of anionic surfactants in the compositions is generally between 5 and 40% by weight.
  • the nonionic surfactants used are preferably alkoxylated, advantageously ethoxylated, in particular primary alcohols having preferably 8 to 18 carbon atoms and an average of 1 to 12 moles of ethylene oxide (E0) per mole of alcohol in which the alcohol radical has a methyl or linear branching, preferably in the 2-position can be or linear and methyl branched radicals can contain in the mixture, as they are usually present in oxo alcohol residues.
  • alcohol ethoxylates with linear residues of alcohols of native origin with 12 to 18 carbon atoms, for example from coconut, palm, tallow or oleyl alcohol, and an average of 2 to 8 EO per mole of alcohol are particularly preferred.
  • the preferred ethoxylated alcohols include, for example, Ci2-i4 alcohols with 3 EO or 4 EO, Cg-Cn alcohol with 7 EO, Ci3-Cj5 alcohols with 3 EO, 5 EO, 7 EO or 8 EO, Ci2-Ci8- Alcohols with 3 EO, 5 EO or 7 EO and mixtures of these, such as mixtures of C12-Cj4 alcohol with 3 EO and Ci2-Ci8-Al ohol with 5 EO.
  • the degrees of ethoxylation given represent statistical averages, which can be an integer or a fraction for a specific product.
  • Preferred alcohol ethoxylates have a narrow homolog distribution (narrow range ethoxylates, NRE).
  • fatty alcohols with more than 12 EO can also be used. Examples of this are tallow fatty alcohol with 14 EO, 25 EO, 30 EO or 40 EO.
  • alkyl glycosides of the general formula R0 (G) x can also be used as further nonionic surfactants, in which R is a primary straight-chain or methyl-branched aliphatic radical with 8 to 22, preferably 12 to 18, C. -Atoms means and G is the symbol which stands for a glycose unit with 5 or 6 carbon atoms, preferably for glucose.
  • the degree of oligomerization x which indicates the distribution of monoglycosides and oligoglycosides, is any number between 1 and 10; x is preferably 1.2 to 1.4.
  • Other suitable surfactants are polyhydroxy fatty acid of the formula (II),
  • R 2 is C0 for an aliphatic acyl radical with 6 to 22 carbon atoms
  • R3 for hydrogen, an alkyl or hydroxyalkyl radical with 1 to 4 carbon atoms and [Z] for a linear or branched polyhydroxyalkyl radical with 3 to 10 carbon atoms and 3 is up to 10 hydroxyl groups.
  • the proportion of nonionic surfactants in the compositions is generally 2 to 25% by weight.
  • All previous builder substances conventionally used can be used as further inorganic builder substances. These include, in particular, zeolites, crystalline layered silicates, even phosphates, if their use should not be avoided for ecological reasons. Their content can vary within a wide range depending on the content of the alkali metal silicates according to the invention.
  • the sum of customary builder substances and the silicates according to the invention is usually 10 to 60% by weight.
  • Usable organic builders are, for example, the polycarboxylic acids preferably used in the form of their sodium salts, such as citric acid, adipic acid, succinic acid, glutaric acid, tartaric acid, sugar acids, aminocarboxylic acids, nitrilotriacetic acid (NTA), provided that such use is not objectionable for ecological reasons. and mixtures of these.
  • Preferred salts are the salts of polycarboxylic acids such as citric acid, adipic acid, succinic acid, glutaric acid, tartaric acid, sugar acids and mixtures of these.
  • Suitable polymeric polycarboxylates are, for example, the sodium salts of polyacrylic acid or polymethacrylic acid, for example those with a relative molecular weight of 800 to 200,000 (based on acid).
  • Suitable copolymeric polycarboxylates are, in particular, those of aerylic acid with methacrylic acid and of acrylic acid or methacrylic acid with maleic acid. Copolymers of acrylic acid with maleic acid which contain 50 to 90% by weight of acrylic acid and 50 to 10% by weight of maleic acid have proven to be particularly suitable.
  • Their relative molecular weight, based on free acids is generally 5,000 to 200,000, preferably 10,000 to 120,000 and in particular 50,000 to 100,000.
  • Biodegradable terpolymers are also particularly preferred, for example those which, as monomers, contain salts of acrylic acid and maleic acid and vinyl alcohol or Contain vinyl alcohol derivatives (P 43 00 772.4) or the salts of acrylic acid and 2-alkylallylsulfonic acid as monomers and sugar derivatives (P 4221 381.9).
  • Other suitable builder systems are oxidation products of carboxyl-containing polyglucosans and / or their water-soluble ones
  • W0-A-93/08251 are described or their production is described, for example, in international patent application WO-A-93/16110 or the older German patent application P 43 30 393.0.
  • the agents can also contain components which have a positive influence on the oil and fat washability from textiles. This effect is particularly evident when a textile is soiled that has already been washed several times beforehand with a detergent according to the invention which contains this oil and fat-dissolving component.
  • the preferred oil- and fat-dissolving components include, for example, nonionic cellulose ethers such as methyl hydroxypropyl cellulose with a proportion of methoxyl groups of 15 to 30% by weight and of hydroxypropoxyl groups of 1 to 15% by weight, based in each case the nonionic cellulose ether, and the polymers of phthalic acid and / or terephthalic acid or known from the prior art. of their derivatives, in particular polymers of ethylene terephthalates and / or polyethylene glycol terephthalates.
  • the agents can also contain other water-soluble inorganic salts such as bicarbonates and carbonates, preferably in their alkali metal salt form.
  • the content of sodium carbonate in the compositions can be, for example, up to about 20% by weight, preferably between 5 and 15% by weight, and is in the range from 20% by weight of the silicates according to the invention, in particular to about 10% by weight.
  • alkali arbonates can also be replaced by sulfur-free, 2 to 11 carbon atoms and, if appropriate, an amino acid and / or salts thereof having a further carboxyl and / or amino group.
  • it is preferred that the alkali metal arbonates be partially or completely replaced by glycine or glycinate.
  • bleaching agents are, for example, sodium percarbonate, peroxypyrophosphates, citrate perhydrates and H2O2-providing peracidic salts or peracids, such as perbenzoates, peroxophthalates, diperazelaic acid or diperdodecanedioic acid.
  • the bleaching agent content of the agents is preferably 5 to 25% by weight and in particular 10 to 20% by weight, advantageously using boron monohydrate.
  • bleach activators can be incorporated into the preparations.
  • N-acyl or O-acyl compounds which form organic peracids with H2O2, preferably N, N'-tetraacylated diamines, furthermore carboxylic acid anhydrides and esters of polyols such as glucose pentaacetate.
  • Further known bleach activators are acetylated mixtures of sorbitol and mannitol, as are described, for example, in European patent application EP-A-0525239.
  • the bleach activators contain bleach activators in the usual range, preferably between 1 and 10% by weight and in particular between 3 and 8% by weight.
  • bleach activators are N, N, N ', N'-tetraacetylethylenediamine (TAED), 1,5-diacetyl-2,4-dioxo-hexahydro-1,5,5-triazine (DADHT) and acetylated sorbitol-mannitol mixtures (SORMAN).
  • TAED N, N, N ', N'-tetraacetylethylenediamine
  • DADHT 1,5-diacetyl-2,4-dioxo-hexahydro-1,5,5-triazine
  • SORMAN acetylated sorbitol-mannitol mixtures
  • Suitable foam inhibitors are, for example, soaps of natural or synthetic origin, which have a high proportion of C ⁇ g-C24 * fatty acids.
  • Suitable non-surfactant-like foam inhibitors are, for example, organopolysiloxanes and their mixtures with microfine, optionally silanized silica, and paraffins, waxes, microcrystalline waxes and their mixtures with silanized silica or bistearylethylenediamide. Mixtures of various foam inhibitors are also used with advantages, for example those of silicones, paraffins or waxes.
  • the foam inhibitors, in particular silicone or paraffin-containing foam inhibitors are preferably bound to a granular, water-soluble or dispersible carrier substance. Mixtures of paraffins and bistearylethylenediaids are particularly preferred.
  • Suitable enzymes are those from the class of proteases, lipases, amylases, cellulases or mixtures thereof. Enzymatic active ingredients obtained from bacterial strains or fungi such as Bacillus subtilis, Bacillus licheniformis and Streptomyces griseus are particularly suitable. Proteases of the subtilisin type and in particular proteases which are obtained from Bacillus lentus are preferably used.
  • Enzyme mixtures for example of protease and amylase or protease and lipase or protease and cellulase or of cellulase and lipase or of protease, amylase and lipase or protease, lipase and cellulase, but in particular mixtures containing cellulase, are of particular interest.
  • Peroxides or oxidases have also proven to be suitable in some cases.
  • the enzymes can be adsorbed on carriers and / or embedded in coating substances in order to protect them against premature decomposition.
  • the proportion of the enzymes, enzyme mixtures or enzyme granules can be, for example, about 0.1 to 5% by weight, preferably 0.1 to about 2% by weight.
  • the salts of polyphosphonic acids in particular l-hydroxyethane-l, l-diphosphonic acid (HEDP), diethylenetriaminepentamethylenephosphonic acid (DETPMP) or ethylenediaminetetramethylenephosphonic acid (EDTMP) are suitable as stabilizers, in particular for per compounds and enzymes.
  • Graying inhibitors have the task of keeping the dirt detached from the fiber suspended in the liquor and thus preventing graying.
  • Water-soluble colloids of mostly organic nature are suitable for this, for example the water-soluble salts of polymeric carboxylic acids, glue, gelatin, salts of ether carboxylic acids or ether sulfonic acids of starch or cellulose or salts of acidic sulfuric acid esters of cellulose or starch.
  • Water-soluble polyamides containing acidic groups are also suitable for this purpose. Soluble starch preparations and starch products other than those mentioned above can also be used, for example degraded starch, aldehyde starches, etc.
  • Polyvinylpyrrolidone can also be used.
  • cellulose ethers such as carboxyethyl cellulose (Na salt), methyl cellulose, hydroxyalkyl cellulose and mixed ethers such as Methylhydroxyethylcellulose, methylhydroxypropylcellulose, methylcarboxymethylcellulose and mixtures thereof, and also polyvinylpyrrolidone, for example in amounts of 0.1 to 5% by weight, based on the composition.
  • the agents can contain derivatives of diaminostilbenedisulfonic acid or its alkali metal salts. Suitable are e.g. Salts of 4,4'-bis (2-anilino-4-morpholino-l, 3,5-triazinyl-6-amino) stilbene-2,2'-disulfonic acid or similar compounds, instead of morpholino Group carry a diethanolamino group, a methylamino group, an anilino group or a 2-methoxyethylamino group. Brighteners of the substituted diphenylstyryl type may also be present, e.g.
  • the bulk density of the preferred granular washing or cleaning agents which contain the silicates according to the invention is generally 300 to 1200 g / 1, but preferably 500 to 1100 g / 1. Washing and cleaning agents with bulk densities of at least 700 g / l are very particularly preferred. They can be prepared by any of the known processes, such as mixing, spray drying, granulating and extruding, the silicates or cogranulates of the silicates according to the invention advantageously being processed or mixed with the other components of the composition with further valuable substances.
  • anionic surfactants in the form of a spray-dried, granulated or extruded compound, either as an additive component in the processes mentioned or as an additive to other granules.
  • further individual constituents of the agent for example carbonates, citrate or citric acid or other polycarboxylates or polycarboxylic acids, polymeric polycarboxylates, zeolite and / or layered silicates, for example layered ones Crystalline disiliates are subsequently mixed into spray-dried, granulated and / or extruded components.
  • a drying unit of the type described above was used for the production of the products.
  • Such units are sold, for example, by VOMM Impianti e Proessi, Via Liberta 34, 1-20090 Cesano Boscone (Milano), Italy.
  • Na-58/60 (Henkel KGaA, Dusseldorf) with a solids content of 54.5% by weight after depth filtration through a plate filter with filter aid was used as the sodium water glass solution. More detailed information about the experimental conditions and properties of the products obtained are summarized in Table 1.
  • the grain size distribution was determined by sieve analysis.
  • the Klett number was measured using the method cited at the beginning with light of the wavelength. 400 - 460 nm with a measuring device from Klett Manufacturing Co. Inc., New York. 1% by weight solutions were used as sample solutions.
  • the Klett number of a 1% by weight solution of a product conventionally dried in a spray tower using flue gas was determined (Porti1 A, Henkel KGaA, Dusseldorf): It was 9.
  • the water content was determined by the weight loss when heated to 800 ° C. for three hours.
  • the particle size distribution was examined using a laser diffraction spectrometer (from Helos). Thereafter, 80% of the particles were in the size range 2 to 33 ⁇ m, each 10% below or above these limits.
  • Na-SKS-6 R crystalline sodium disilicate with layer structure, commercial product from Hoechst, Germany
  • the Ca binding capacity was determined by adding a defined amount of the sample to be examined to a Ca 2+ solution of 30 ° d, which had been adjusted to pH 10 with dilute sodium hydroxide solution. The mixture was stirred for 10 minutes at room temperature and then filtered through a membrane filter ( ⁇ 0.45 ⁇ m). The content of Ca 2+ ions in the filtrate was determined complexometrically by titration against EDTA and converted into the calcium binding capacity in mg CaO / g active substance.
  • VI Porti1 R A: Spray-dried soda water glass with module 2 and loss on ignition (800 ° C) approx. 18%. Commercial product from Henkel, Germany
  • PKS pyrogenic silica, Aerosil R 200, from Degussa, Frankfurt

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

Un silicate alcalin amorphe et granulé contenant de l'acide silicique a une densité apparente comprise entre 500 et 1200 g/l et sa solution aqueuse à 1 % en poids a un indice de Klett compris entre 6 et 100. L'invention concerne également un procédé de production de ce granulé dans un sécheur à turbine avec un gaz contenant du CO2 comme gaz de séchage, et son utilisation comme adjuvant dans des produits de lavage et de nettoyage.
PCT/EP1995/002015 1994-06-06 1995-05-26 Silicate alcalin contenant de l'acide silicique granule et soluble dans l'eau WO1995033684A1 (fr)

Priority Applications (1)

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AU27365/95A AU2736595A (en) 1994-06-06 1995-05-26 Granulated, water-soluble, silicic-acid-containing alkaline silicate

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DEP4419745.4 1994-06-06
DE19944419745 DE4419745A1 (de) 1994-06-06 1994-06-06 Granuliertes wasserlösliches kieselsäurehaltiges Alkalisilicat

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Publication number Priority date Publication date Assignee Title
DE19501269A1 (de) 1995-01-18 1996-07-25 Henkel Kgaa Amorphes Alkalisilikat-Compound
DE19525378A1 (de) * 1995-07-12 1997-01-16 Henkel Kgaa Amorphes Alkalisilicat-Compound
DE19533790A1 (de) * 1995-09-13 1997-03-20 Henkel Kgaa Verfahren zur Herstellung eines amorphen Alkalisilikats mit Imprägnierung
GB9523571D0 (en) * 1995-11-17 1996-01-17 Unilever Plc Detergent compositions
DE10054686A1 (de) * 2000-11-03 2002-06-06 Heinz B Mader Lösch- und Brandschutzmittel

Citations (5)

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US3886079A (en) * 1971-09-27 1975-05-27 Burke Oliver W Jun Detergent compositions and detergent adjuvant combinations thereof, and processes for forming the same
EP0248745A1 (fr) * 1986-05-27 1987-12-09 Rhone-Poulenc Chimie Cogranules silicate - silice, procédé d'obtention et utilisation dans les compositions détergentes
FR2638154A1 (fr) * 1988-10-21 1990-04-27 Ausimont Srl Procede en deux etapes pour la production de silicate de sodium non mottant
EP0526978A2 (fr) * 1991-07-02 1993-02-10 Crosfield Limited Silicates
EP0542131A2 (fr) * 1991-11-13 1993-05-19 VOMM IMPIANTI E PROCESSI S.r.L. Produit granulé de poids spécifique élevé, spécialement additif pour compositions détergentes en poudre et son procédé de préparation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886079A (en) * 1971-09-27 1975-05-27 Burke Oliver W Jun Detergent compositions and detergent adjuvant combinations thereof, and processes for forming the same
EP0248745A1 (fr) * 1986-05-27 1987-12-09 Rhone-Poulenc Chimie Cogranules silicate - silice, procédé d'obtention et utilisation dans les compositions détergentes
FR2638154A1 (fr) * 1988-10-21 1990-04-27 Ausimont Srl Procede en deux etapes pour la production de silicate de sodium non mottant
EP0526978A2 (fr) * 1991-07-02 1993-02-10 Crosfield Limited Silicates
EP0542131A2 (fr) * 1991-11-13 1993-05-19 VOMM IMPIANTI E PROCESSI S.r.L. Produit granulé de poids spécifique élevé, spécialement additif pour compositions détergentes en poudre et son procédé de préparation

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DE4419745A1 (de) 1995-12-07

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