Sulfonation of fatty acid esters

Details Sulfonation of fatty acid esters Sulfonation of fatty acid esters

C - Chemistry, Metallurgy

07

C

C07C 309/17 (2006.01) C07C 303/14 (2006.01) C07C 303/32 (2006.01) C07C 303/44 (2006.01)

Patent

CA 2130027

A sulfonation process includes the process steps of air sulfonating a fatty acid alkyl ester feedstock, bleaching the crude product with co- addition of up to about 40 wt.% of an alcohol based upon the weight of the crude product. The bleaching/alcohol addition step of the process is performed in a non-metallic or low-iron alloy system at temperatures above 90°C. The resulting product is then neutralized with a liquid base or metal carbonate.

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