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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/662—Carbohydrates or derivatives
• • 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
• • 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
  • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
  • C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes

Definitions

• the invention relates to a process for producing an aqueous-based surfactant paste stabilized against microbial attack, the surfactant in particular consisting essentially of a nonionic surfactant of the alkylglycoside type.
• the invention relates to a process for the preparation of an aqueous stabilized surfactant paste containing 30 to 70% by weight of a surfactant which is stable in an alkaline medium and which has arisen from an oxidative bleaching process in which, after the residual peroxide content has been broken down, the values are at most 50 to 100 ppm H2O2 adjusts the pH to at least 11 by adding alkalis and the water content of the pastes to 30 to 70% by weight.
• the product according to the invention is color-stable and free from microbial attack even after storage for several months at 40 to 50 ° C. and therefore does not require any additional chemical preservation.
• aqueous surfactant pastes protected against microbial attack can have excellent storage stability even without a content of the usual preservatives, if care is taken in their composition that certain impurities are not present.
• an aqueous surfactant paste which contains 30 to 70% by weight of a surfactant which is stable in an alkaline medium, in particular a nonionic surfactant of the alkylglycoside type, and which is essentially free of bleachable color bodies and of such colorant precursors which are used in an alkaline environment lead to discoloration, as well as being essentially free of by-products and of residues which lower the pH during storage due to the consumption of alkalinity, and that the paste, due to the presence of added alkaline substances, has a pH of at least 11, in particular from 11 to 12.5 and preferably of at least 11.5.
• Surfactants which are stable in an alkaline environment are understood to be surfactant compounds of the alkoxylated long-chain alcohol type, in particular the fatty alcohol ethoxylates, which also include compounds with closed end groups.
• Surfactants of the alkylglycoside type are particularly preferred.
• the particularly preferred alkyl glycosides are nonionic surfactants such as are known, for example, from US Pat . Nos . 3547828 and 3839318 . Manufacturing processes for particularly light-colored and color-stable alkyl glycosides are described in European patent applications EP-A1 0301298 , EP-A1 0362671 and EP-A1 0357969 .
• the alkyl component of the alkyl glycosides generally consists of aliphatic radicals with 8 to 24, in particular 8 to 18, carbon atoms.
• the corresponding fatty alkyl radicals as are obtainable from fat as a renewable raw material via the fatty alcohols, are particularly preferred.
• alkyl residues derived from synthetic primary alcohols, in particular the so-called oxo alcohols can also be used; however, they are less preferred in the present case.
• the sugar component in the alkyl glycoside can be from conventional aldoses or ketoses, such as. B.
• glucose is the particularly preferred sugar component.
• the average degree of oligomerization of the alkyl glycosides as they are present in the pastes according to the invention can be arbitrary from the point of view of the paste stability, ie it can be in the usual range from 1.2 to 3.0.
• alkylglycosides preference is given to using alkylglycosides in which the degree of oligomerization is clearly below 1.5, in particular in the range from 1.3 to 1.4, and the associated fatty alkyl radical is essentially around C12.
• C8 ⁇ 10 or C14 ⁇ 16 may be present.
• These alkyl glycosides are characterized by particularly good surfactant properties. Together with water and the alkaline substances, they form a particularly preferred embodiment of the invention.
• Further preferred embodiments relate to C8 / C10 and C14 / C16 centered C chain cuts.
• the former have very good solvent-imparting properties, the latter are suitable as wetting agents and emulsifiers.
• surfactant paste refers to a viscosity range that ranges from flowable to viscous. Accordingly, the viscosities (measured according to Höppler at 40 ° C or according to Brookfield Helipath at 40 ° C and 4 revolutions per minute) are in the range from about 1,000 to 100,000.
• the surfactants present in the aqueous surfactant paste, in particular the alkyl glycosides, are essentially free of bleachable color bodies, color body precursors, by-products which impair color quality, if these surfactants have been subjected to a bleaching process at the end of their production. It is preferably an oxidative bleaching process, in particular using hydrogen peroxide as the oxidizing agent. This bleaching process is preferably carried out in the presence of magnesium cations, which magnesium cations, either in the form of alkaline magnesium compounds such as the oxide, hydroxide, carbonate or an alcoholate, can already get into the system in the case of the alkylglycosides in order to neutralize the acid catalyst at the end of the production process.
• the invention therefore also relates to a process for the preparation of the storage-stable aqueous surfactant paste, in particular the alkyl glycoside paste, as is obtained by the customary production methods for alkali-stable surfactants, in particular the alkyl glycosides after the additional bleaching with aqueous H 2 O 2, this bleaching process being an oxidative bleaching process with H 2 O 2 in the presence of magnesium compounds in an alkaline medium above pH 9, preferably above pH 10, and this method is characterized in that after the breakdown of the residual peroxide content to values of at most 50 to 100 ppm H2O2, the pH Addition of alkalis, in particular those alkaline compounds which do not interfere with the further use of the surfactant paste or whose presence is desired, in particular sodium hydroxide, potassium hydroxide, or sodium or potassium carbonates to a pH of at least 11, in particular 11 bi s sets 12.5 and preferably at least 11.5, and the water content of the pastes can be in the range from 30 to 70%.
• aqueous surfactant pastes according to the invention produced in this way if they are present in the particularly preferred form of the alkylglucoside pastes, can also be mixed with additional surfactants which have otherwise been rendered alkali-stable, so as to to arrive at a product which contains a surfactant mixture in compounded form, as is particularly useful for further processing, or by which the viscosity and flow behavior of the paste are favored during storage.
• the production stages peroxide bleaching, peroxide degradation and pH adjustment can be carried out continuously or discontinuously.
• the bleaching stage and the peroxide degradation stage are preferably carried out continuously, with in particular stirred tank cascades having suitable temperature and residence time parameters being selected on the production scale.
• the stage of peroxide bleaching with H2O2 is carried out at 110 ° C with an average residence time of 2 hours, with a residual peroxide value of about 300 to 600 ppm H2O2.
• the subsequent peroxide decomposition stage the mixture is kept at 120 ° C. for a mean residence time of 3 hours and a residual peroxide content of 30 to 70 ppm is reached.
• the pH of the paste obtained was 11.5. After 4 months of storage it remained stable at 60 ° C.
• the product showed in the microbial load test with 106 bacteria and 105 fungi / g killing times of a maximum of 3 days for bacteria and a maximum of 14 days for fungi over the entire storage period.
• Bacterial mixture Staphylococcus aureus, Enterococcus faecium, Escherichia coli, Enterobacter aerogenes, Pseudomonas aeruginosa.
• Fungus mixture Candida albicans, Aspergillus niger, Penicillium rubrum, Trichoderma viride).
• the viscosity of the paste was 1800 mPa ⁇ s at 40 ° C, measured according to DIN 53015.

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• Chemical & Material Sciences (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)
• Molecular Biology (AREA)
• Health & Medical Sciences (AREA)
• Dispersion Chemistry (AREA)
• Detergent Compositions (AREA)
• Cosmetics (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Inorganic Insulating Materials (AREA)
• Glass Compositions (AREA)
• Die Bonding (AREA)
• Noodles (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 1990
  • 1990-11-09 DE DE4035722A patent/DE4035722A1/de not_active Ceased
• 1991
  • 1991-11-04 CA CA002095933A patent/CA2095933A1/en not_active Abandoned
  • 1991-11-04 JP JP03517678A patent/JP3140056B2/ja not_active Expired - Lifetime
  • 1991-11-04 AT AT91918719T patent/ATE118811T1/de not_active IP Right Cessation
  • 1991-11-04 WO PCT/EP1991/002073 patent/WO1992008781A1/de active IP Right Grant
  • 1991-11-04 RU RU93041060A patent/RU2104296C1/ru active
  • 1991-11-04 EP EP91918719A patent/EP0556220B1/de not_active Expired - Lifetime
  • 1991-11-04 UA UA93004078A patent/UA26985C2/ru unknown
  • 1991-11-04 KR KR1019930701392A patent/KR100200543B1/ko not_active IP Right Cessation
  • 1991-11-04 BR BR919107072A patent/BR9107072A/pt not_active IP Right Cessation
  • 1991-11-04 ES ES91918719T patent/ES2068609T3/es not_active Expired - Lifetime
  • 1991-11-04 DE DE59104729T patent/DE59104729D1/de not_active Expired - Lifetime
  • 1991-11-07 MY MYPI91002059A patent/MY110807A/en unknown
  • 1991-11-08 CN CN91110567A patent/CN1033170C/zh not_active Expired - Lifetime
  • 1991-11-08 MX MX9101995A patent/MX9101995A/es not_active IP Right Cessation

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