Classifications

• • 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
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
  • C11D3/1246—Silicates, e.g. diatomaceous earth
  • C11D3/1253—Layer silicates, e.g. talcum, kaolin, clay, bentonite, smectite, montmorillonite, hectorite or attapulgite
  • C11D3/1273—Crystalline layered silicates of type NaMeSixO2x+1YH2O
• • 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
  • C11D3/10—Carbonates ; Bicarbonates

Definitions

• the present invention relates to a granular detergent builder in the form of a cogranulate from a mixture of sodium hydrogen carbonate and crystalline phyllosilicates of the general formula NaMSi x O 2x + 1 * yH 2 O, where M means sodium or hydrogen, x is a number from 1.9 to 4 and y is a number from 0 to 20, a process for its preparation and its use.
• alkali metal tripolyphosphates such as sodium tripolyphosphate
• new builder systems which generally consist of a synthetic, crystalline aluminosilicate (for example zeolite A), an alkali source (for example soda) and at least one Cobuilder exist.
• Nitrilotriacetic acid or its salts, phosphonates and also polycarboxylates, in particular those based on acrylic and / or maleic acid, are usually used as cobuilders individually or in combination with one another or in combination with other substances.
• EP-0 425 428 B1 discloses a process for the production of crystalline sodium silicates with a layered structure, in which amorphous sodium silicate with a water content of 15 to 23% by weight in a rotary kiln at temperatures of 500 to 850 ° C. calcined, the calcine after crushing and grinding is fed to a roller compactor and then the school pen obtained after pre-crushing and sieving are processed into granules with a bulk density of 700 to 1000 g / l.
• DE-A-43 30 868 describes a process for the production of compacted, granular sodium silicates, in which the sodium silicate with an average grain diameter of ⁇ 500 ⁇ m is first mixed with a material which increases its hardness before it is compacted, crushed and sieved transferred to a press granulate with grain sizes of 0.1 to 5 mm.
• EP-A-0 164 514 describes the use of crystalline sodium silicates for the softening of water which contains calcium and / or magnesium ions.
• EP-A-0 563 631 discloses water-disintegrating cogranulates with a high bulk density made of aluminosilicates and crystalline sodium silicates with a layer structure, a process for their preparation and their use.
• a disadvantage of all detergent formulations containing aluminosilicate is the water-insolubility of the aluminosilicates, which among other things causes an increased sewage sludge load. It is also disadvantageous that larger agglomerates can form during the processing of aluminosilicates or in the course of their use, so that the use of cobuilders is necessary in order to break up the aluminosilicates into a suspension of fine primary particles, since agglomerates of aluminosilicates - especially zeolite A - have no tendency to disintegrate into the primary particles.
• Detergent formulations such as those described in PCT / WO 92/18594, have a pH value of 10 to 11 in 1% strength solution in distilled water at 20 ° C.
• Detergent builder formulations which include sodium carbonate (soda) as an alkali source contain, inherently have a pH of> 10.
• Alkali-reduced detergents on the other hand, require other builders or builder combinations in which it would be desirable for the builder formulations to have an intrinsic pH in the range of ⁇ 10. A low pH value contributes significantly to protecting delicate fabrics during the washing process.
• the granular detergent builder preferably has a bulk density of ⁇ 900 g / l.
• the degree of reaction between crystalline layered silicate and sodium hydrogen carbonate is preferably between 5 and 60%.
• the sodium silicates in the granular detergent builder according to the invention preferably have an SiO 2 / Na 2 O ratio of (1.9 to 2.1): 1.
• the present object is also achieved by a process for producing a granular detergent builder in the form of a cogranulate from a mixture of sodium hydrogen carbonate and crystalline phyllosilicates of the general formula NaMSi x O 2x + 1 * yH 2 O, where M is sodium or hydrogen, x is a number from 1.9 to 4 and y is a number from 0 to 20, which is characterized in that sodium hydrogen carbonate and sodium silicate are mixed together in powder form; that the mixture is fed to a zone in which it is compacted under pressure between two rollers rotating in opposite directions to form a solid (Schulpen); that you crush the solid; and that the desired grain sizes are finally separated from the oversize and undersize.
• the pressure of the rolls preferably corresponds to a line pressure Kratt> 20 kN / cm at 200 mm roll diameter.
• the Schulpen preferably have a temperature of ⁇ 70 ° C.
• the crystalline sodium disilicate with a layer structure contained in the cogranulates according to the invention ( ⁇ -sodium disilicate is commercially available from Hoechst AG, Federal Republic of Germany, under the name SKS-6®) is slowly water-soluble, as a result of which sludge relief in the sewage treatment plants is achieved.
• the component soda can optionally be completely omitted in the detergent or cleaning agent formulation, since the crystalline sodium disilicate is a source of alkali.
• the invention also relates to the use of the granular detergent builder according to the invention in detergents and cleaning agents.
• the above-mentioned detergents and cleaning agents preferably contain 3 to 60% by weight of the granular detergent builder.
• the detergents and cleaning agents can additionally contain other detergent builders and other detergent auxiliaries.
• the other detergent builders are preferably sodium tripolyphosphate, zeolite A, zeolite P, amorphous silicates, water glass and / or alkali metal carbonates.
• the other detergent ingredients are preferably surfactants, bleaches, bleach activators, bleach stabilizers, enzymes, polycarboxylates and / or carboxyl-containing cobuilders.
• the analysis data of the cogranulates according to the invention were determined using the following test methods.
• the particle size distribution is determined on the basis of a 50 gram sample by sieve analysis (apparatus used: RETSCH VIBRATONIC) and the mean particle diameter is determined from this by means of a graphic evaluation.
• the granules to be examined are sieved in the sample preparation via a sieve (710 ⁇ m).
• the undersize is used to determine the kinetics of decay in water (18 ° dH) with a MICROTRAC Series 9200 (Leeds & Nothrup GmbH).
• the pH value is measured in a 1% solution in distilled water at 20 ° C with a digital pH meter CG 840 from SCHOTT.
• the degree of preservation provides information about what percentage of the starting components are present side by side in an unreacted form.
• the temperature increase is determined which is achieved by the amount of heat released and the corresponding heat of solution when 25 grams of the cogranulate sample to be measured are added to 100 grams of distilled water.
• the degree of maintenance is related to the temperature increase of the zero value, which is achieved if instead of the cogranulate, only a corresponding physical mixture of the starting components is used in the determination.
• the filtrate must be made strongly acidic (pH ⁇ 2.5) due to possible reprecipitation with HCl, so that the excess carbonate in the form of CO 2 can be removed from the filtrate by stirring.
• the calcium remaining in the filtrate is then determined complexometrically.
• the calcium binding capacity generally referred to as the KBV value, was calculated by forming the difference with the original calcium content.
• the result is a solution with 3 ° dH.
• the solution is kept in a water bath thermostat (ERWEKA) with stirring at 20 ° C. and 1 gram of the cogranulate sample to be measured is added.
• ERWEKA water bath thermostat
• the sample is then filtered through a folded filter (Ederol 12). If the sample to be examined contains carbonate, the filtrate must be made strongly acidic (pH ⁇ 2.5) due to possible precipitation with HCl, so that the excess carbonate in the form of CO 2 can be removed from the filtrate by stirring.
• the magnesium remaining in the filtrate is then determined complexometrically. The magnesium binding capacity was calculated by forming the difference with the original magnesium content.
• SKS-6® sodium disilicate

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• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Crystallography & Structural Chemistry (AREA)
• Detergent Compositions (AREA)
• Silicates, Zeolites, And Molecular Sieves (AREA)

Applications Claiming Priority (2)

Publications (3)

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Citations (6)

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• 1995
  • 1995-07-11 DE DE19525197A patent/DE19525197A1/de not_active Withdrawn
• 1996
  • 1996-06-10 DE DE59609711T patent/DE59609711D1/de not_active Expired - Fee Related
  • 1996-06-10 EP EP96109246A patent/EP0753568B1/fr not_active Expired - Lifetime
  • 1996-06-11 TW TW085107027A patent/TW352393B/zh active
  • 1996-07-09 US US08/675,991 patent/US5874397A/en not_active Expired - Fee Related
  • 1996-07-10 CA CA002180926A patent/CA2180926A1/fr not_active Abandoned
  • 1996-07-10 CN CN96110632A patent/CN1146484A/zh active Pending
  • 1996-07-10 JP JP8180854A patent/JPH0931491A/ja not_active Withdrawn
  • 1996-07-11 KR KR1019960027862A patent/KR970006469A/ko not_active Application Discontinuation

Patent Citations (6)

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