Preparation of sulphonates

Details Preparation of sulphonates Preparation of sulphonates

C - Chemistry, Metallurgy

07

C

260/502.5

C07C 143/11 (1985.01) C07C 143/24 (1985.01)

Patent

CA 1236482

ABSTRACT OF THE DISCL()SURE The present invention relates to a process for producing polyoxyalkylene ethane sulphonates of formula Image wherein R is selected from a C1-C20 alkyl group and a phenyl group having at least one C1-C20 alkyl substituent, R1 is H or CH3, M is a cation, x is an integer from 1 to 3, m has a value from 0 to 20 and n has an average value from 1 to 50 such that when R1 is H and x is 1, the sum of m + n is from 1 to 50. The polyoxyalkylene ethane sulphonates are useful as surfactants. The process comprises reacting the parent ethane halide with a metal sulphite in an aqueous medium in the presence of a small quantity of the preformed reaction product, The presence of the reaction product avoids problems of high viscosity during reaction. .s, ~

476371

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