METHOD FOR BLEACHING ESTER OF ALPHA-SULFOFATTY ACID

PURPOSE:To bleach continuously an ester of an alpha-sulfofatty acid without forming a dimetallic salt as a by-product not requiring the step for adding water, by mixing an ester of an alpha-sulfofatty acid with an alcohol, and bleaching the resultant mixture with hydrogen peroxide. CONSTITUTION:An e...

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Hauptverfasser:	SEKIGUCHI SHIZUO, MIYAWAKI YOUZOU
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES CHEMISTRY DETERGENT COMPOSITIONS DETERGENTS FATTY ACIDS THEREFROM METALLURGY ORGANIC CHEMISTRY RECOVERY OF GLYCEROL RESIN SOAPS SOAP OR SOAP-MAKING USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	PURPOSE:To bleach continuously an ester of an alpha-sulfofatty acid without forming a dimetallic salt as a by-product not requiring the step for adding water, by mixing an ester of an alpha-sulfofatty acid with an alcohol, and bleaching the resultant mixture with hydrogen peroxide. CONSTITUTION:An ester of a fatty acid expressed by the formula RCH2COOR' (R is 10-20C straight or branched chain alkyl; R' is 1-6C straight or branched chain alkyl) is sulfonated to give an ester of the alpha-sulfofatty acid, which is then mixed with a 1-6C alcohol, e.g. methanol, ethanol or butanol. Hydrogen peroxide is then added to bleach the resultant mixture at 50-100 deg.C for 5-120min and give the aimed light-colored ester of the alpha-sulfofatty acid. The amount of the alcohol to be added is 5-30pts.wt. based on 100pts.wt. ester of the alpha-sulfofatty acid, and that of the hydrogen peroxide is 0.2-10pts.wt. An ester salt of the alpha-sulfofatty acid obtained by neutralizing the resultant ester is useful as a detergent surfactant.