Lever Brothers Company

Lever Brothers Company, Division of Conopco, Inc.

Karla J Rys

Frederick S Osmer

Joseph J Podgorsky

Alan P Greene

Yuriy O Kutny

David A Richardson

A batch and continuous process is disclosed for the production of a composition comprising alkali metal salts of C.sub.8 -C.sub.22 alkyl fatty monocarboxylic acid and C.sub.8 -C.sub.22 acyl isethionate in a ratio of 20:1 to 1:0.98. Both batch and continuous routes require that the saponifying aqueous caustic solution includes sodium hydroxide and sodium isethionate maintained as a hot solution at a temperature of from 180.degree. F. to about 200.degree. F. For the batch route, the sequence of steps require the caustic solution to be added slowly to the fatty acid. In the continuous process, it is advantageous to introduce fatty acid upstream from the point where the caustic solution stream enters the mixing chamber.

Process for preparing soap-acyl isethionate compositions

A skin cleansing composition is provided that includes a combination of C.sub.16 -C.sub.18 acyl isethionate ester salts having no more than 25% C.sub.14 or lower acyl groups with at least one co-active surfactant. The weight ratio of acyl isethionate to co-active will range from about 20:1 to about 1:1. Soap is present in an amount no higher than 10% by weight of the composition.

Acyl isethionate skin cleansing compositions

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Little Ferry, NJ, United States of America

Karla J Rys