Process for the preparation of light-colored oleic acid sulfonates

摘要

PCT No. PCT/EP90/01248 Sec. 371 Date Feb. 10, 1992 Sec. 102(e) Date Feb. 10, 1992 PCT Filed Jul. 31, 1990 PCT Pub. No. WO91/01972 PCT Pub. Date Feb. 21, 1991.A process for the preparation of light-colored oleic acid sulfonates by continuous sulfonation of an industrial oleic acid having an oleic acid content of 65 to 85% by weight and a linoleic acid content of up to 13% by weight with gaseous sulfur trioxide in a molar ratio of industrial oleic acid to sulfur trioxide of 1 : 0.8 to 1 : 1.0, neutralization and hydrolysis of the acid sulfonation product with aqueous bases and bleaching of the neutralized and hydrolyzed sulfonation product give oleic acid sulfonates having Klett color numbers of not more than 100.