Title: Salts of alpha-sulfo fatty acid ester with detergent active
Application Number: 86107518 Application Date: 1986.10.29
Publication Number: 1011345 Publication Date: 1987.06.03
Approval Pub. Date: 1991.05.15 Granted Pub. Date: 1991.05.15
International Classifi-cation: C11D1/28
Applicant(s) Name: Henkel Kommanditgesellschaft auf Aktien Address:
Inventor(s) Name: Hans Josef Rommerskirchen;Robert Piorr
Attorney & Agent: TIANG YUE MU DEJUN
Abstract:
    In the production of washing-active alpha -sulfofatty acid esters by sulfonation of fatty acid alkyl esters with SO3 in molar ratios of up to 1:2 and more especially of from 1:1.2 to 1:1.8. before the treatment with the aqueous medium, subsequent working-up of the crude sulfonic acid in aqueous medium with salt formation have a post-reaction at temperatures above 70 DEG C, and adjusting the solids contents of the alpha -sulfofatty acid ester salts to more than 35% by weight in the subsequent aqueous working-up step. in the post-reaction at least about 0.5 mole equivalent, based on the SO3 which is not used for the alpha -sulfonation, of monohydric alcohols and/or alkoxylation products thereof . Aqueous pastes which are mobile, more especially pumpable, at moderately elevated temperatures are obtained by subjecting the crude sulfonate.
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