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
  • C11D1/02—Anionic compounds
  • C11D1/37—Mixtures of compounds all of which are anionic
• • 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
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
• • 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
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/28—Sulfonation products derived from fatty acids or their derivatives, e.g. esters, amides
• • 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
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
  • Y10S516/03—Organic sulfoxy compound containing

Definitions

• aqueous slurries which contain a large part of the detergent constituents or also all detergent constituents. From an economic point of view, it is important that these slurries are as rich in detergent components as possible and as low in liquid fiber as possible. The lowest possible amount of water is therefore used to prepare the slurries. Concentration is limited by the highest possible viscosity at which the slurries can just be processed.
• anionic surfactants which are mostly used as paste-like concentrates in the form of their alkali metal or ammonium salts in the production of detergent slurries.
• the surfactant content of the technical concentrates is, for example in the case of the ⁇ -sulphotalg fatty acid methyl ester sodium salts, around 30% by weight. Pastes with a higher surfactant content can be practically only with great difficulty or no longer process at all.
• a peculiarity in the rheological behavior of these anionic surfactant concentrates is that they do not react to the addition of water with a reduction in viscosity, but first with a thickening to a gel-like state, from which further problems arise for the processor, for example in that valves and Clogged pipes or that gel clumps formed can only be brought back into solution after mechanical comminution.
• DE-OS 22 51 405 describes the salts of certain carboxylic acids, in particular salts of hydroxycarboxylic acids, as viscosity regulators.
• sulfonated aromatic compounds are suitable for this purpose.
• DE-OS 23 26 006 mentions sulfates or sulfonates of aliphatic, optionally substituted hydrocarbons having 1 to 6 carbon atoms as viscosity regulators. The addition of lower alcohols is as a way to Viskosticiansver - reduction given in the cited references.
• hydrotropes such as cumene sulfonate, or of acidic phosphoric acid esters (DE-AS 16 17 160), polyhydric alcohols, certain carboxylic acids and / or esters of these compounds is described (EP-OS 8 060).
• sulfates of certain polyalkylene ether glycols to improve the flow behavior of anionic surfactant concentration is known from EP-OS 24 711.
• aqueous technical anionic surfactant concentrates in particular of ⁇ -sulfofatty acid ester salt concentrates
• the solution of the problem consists in the use of Alkalimetallalkansulfonaten with an average carbon number of 11 to 21 as viscosity regulators for aqueous highly concentrated technical anionic surfactant concentrates, in particular for CC-sulfofatty acid ester salt concentrates, which at least 30 G ew .-% ⁇ -sulfofatty acid ester contained.
• the viscosity regulators are used in amounts of 0.5 to 10% by weight, based on the surfactant content, so that the concentrates at 40 ° C. have a viscosity of at most 10,000 mPas.
• the alkali metal alkanesulfonates used according to the invention as viscosity regulators are known substances which are readily soluble in water and have long been used as washing raw materials which are insensitive to water hardness because of their good wetting, foaming and washing properties. These substances are generally produced by sulfochlorination of n-paraffins with a corresponding carbon number and subsequent saponification of the alkanesulfochlorides formed with alkali metal hydroxides.
• the sodium alkane sulfonates are of particular interest in the context of the invention.
• the alkanesulfonates mentioned consist predominantly of salts of alkane monosulfonic acids, in addition there are portions (about 15 to 50% by weight of the detergent active substance) of di- and polysulfonates.
• the monosulfonate portion in turn mainly consists of secondary alkanesulfonates, the sulfonate groups of which are bound to the individual carbon atoms of the alkane chain in an arbitrary distribution.
• the currently commercially available alkanesulfonates are obtained from relatively narrow n-paraffin sections, for example from fractions with an average chain length of 13, 15 and 20 to 21 carbon atoms.
• the alkanesulfonates used are manufactured by a process that largely excludes chlorination of the carbon chain.
• Corresponding commercial products are available in the form of concentrated solutions, pastes and solid products for the use according to the invention.
• the products mentioned can be used individually or in a mixture as a viscosity regulator.
• Combinations of Alkane sulfonates with average chain lengths of 13, 15 and 20 to 21 carbon atoms can be of particular importance.
• Viscosity regulation is a particular problem with concentrates of ⁇ -sulfofatty acid ester salts, since concentrates with more than about 30% by weight surfactant content are no longer easy to process. If the viscosity problem did not exist, it would be technically possible to produce surfactant concentrates with a surfactant content of up to approximately 80% by weight. The reduction in viscosity of ⁇ -sulfofatty acid ester salt concentrates is therefore a particular object of the present invention.
• the oC-sulfofatty acid ester salt concentrates are derived from fatty acids with 10 to 20, preferably 12 to 18 carbon atoms and from aliphatic alcohols with 1 to 10, preferably 1 to 4, carbon atoms in the molecule .
• the sulfo group is introduced either by sulfonation of the fatty acids and subsequent esterification of the carboxyl group with alcohol or by sulfonation of a corresponding fatty acid ester. Both processes result in esters of sulfofatty acids which contain the sulfofatty acid group in the ⁇ -position.
• the oC-sulfofatty acid ester salts are preferably in the form of alkali metal and / or ammonium salts, in particular sodium salts.
• the salts are prepared by neutralizing the acidic esters with the appropriate bases.
• Particularly suitable oC-sulfofatty acid ester salts are derived from the ethyl and especially from the methyl ester of hydrogenated tallow fatty acid, the acid component of the fatty acid esters consisting essentially of saturated C 16 and C 18 fatty acids.
• alkanesulfonates Through the use of alkanesulfonates according to the invention, a substantial improvement in the flow behavior of aqueous anionic surfactant concentrates, in particular of OC-sulfofatty acid ester salt concentrates, is achieved over the entire temperature range that is suitable for processing such concentrates.
• the addition of the alkanesulfonates defined above has the effect that the viscosity of the surfactant concentrates is greatly reduced.
• the framework formation responsible for the solidification of the mixtures is prevented; these surfactant concentrates are pastes that are flowable and pumpable even at normal temperature.
• the addition of a viscosity regulator can be increased in order to achieve the desired reduction in viscosity. Otherwise, the reduction achieved with a certain amount of viscosity regulator increases with increasing temperature. However, an increase in the working temperature is generally not appropriate - if only for reasons of higher energy consumption.
• Example 6 The sample from Example 6 was stored at room temperature for 7 days. A viscosity of 3,220 mPas was then measured at 23 ° C.

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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)
• Detergent Compositions (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Polysaccharides And Polysaccharide Derivatives (AREA)
• Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
• Steroid Compounds (AREA)

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Publications (3)

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Cited By (6)

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Citations (3)

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• 1984
  • 1984-12-31 DE DE19843447859 patent/DE3447859A1/de not_active Withdrawn
• 1985
  • 1985-12-16 GB GB08530922A patent/GB2168994B/en not_active Expired
  • 1985-12-18 US US06/811,127 patent/US4675128A/en not_active Expired - Fee Related
  • 1985-12-23 AT AT85116508T patent/ATE61391T1/de active
  • 1985-12-23 EP EP85116508A patent/EP0186896B1/fr not_active Expired - Lifetime
  • 1985-12-23 CA CA000498608A patent/CA1240232A/fr not_active Expired
  • 1985-12-23 DE DE8585116508T patent/DE3582040D1/de not_active Expired - Fee Related
  • 1985-12-26 JP JP60299739A patent/JPH0633397B2/ja not_active Expired - Lifetime
  • 1985-12-30 ZA ZA859891A patent/ZA859891B/xx unknown
• 1987
  • 1987-04-07 MY MYPI87000448A patent/MY102299A/en unknown

Patent Citations (3)

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