Patent ID: 6057463
Filing Date: 2000-05-02
Classification: C07C,C11D

Abstract:
A process for preparing blends comprising high active content, substantially salt free N-acyl aminoalkane sulfonate of the formula: ##STR9## wherein R.sub.1 represents a hydrocarbyl group having from about 6 to about 26 carbon atoms, R.sub.2 represents hydrogen, methyl and cyclohexyl, n is an integer from 2 to 4, and Y represents alkali metal or alkaline earth metal; and amphoteric and/or anionic surfactant which comprises(a) preparing a molten reaction mixture comprising said N-acyl 2-aminoalkane sulfonate by direct amidation of an aminoalkane sulfonic acid with a fatty acid or an alkane sulfonic acid with a fatty acid amide at elevated temperatures above about 180.degree. C.,(b) quenching said molten reaction mixture in an aqueous solution comprising amphoteric and/or anionic surfactant and(c) recovering the blended product.