Process for refining crude fluoroalkylsulfonic acid with the use

Details Process for refining crude fluoroalkylsulfonic acid with the use Process for refining crude fluoroalkylsulfonic acid with the use

1994-04-18

1996-03-12

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

562124, C07C30904

Patent

active

054987547

ABSTRACT:
A process for refining a crude fluoroalkylsulfonic acid represented by the general formula RfSO.sub.3 H wherein Rf is a fluoroalkyl group having 1 to 4 carbon atoms into a highly refined one substantially free of impurities, said process comprising the steps of: (a) providing said crude fluoroalkylsulfonic acid, (b) mixing said crude fluoroalkylsulfonic acid with water or said water and an active silica to obtain a mixture, (c) stirring said mixture while maintaining said mixture at a higher temperature than room temperature, and (d) subjecting the mixture treated in said step (c) to distillation.

REFERENCES:
patent: 4927962 (1990-05-01), Aramaki et al.

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