Patent ID: 6479698
Filing Date: 2002-11-12
Classification: C07C

Abstract:
A process for producing an alkali metal or alkaline earth metal sulfonate salt corresponding to the anion of general formula (I):Râ€”CF2â€”SO3âˆ’â€ƒâ€ƒ(I), wherein R is:(a) a hydrogen atom; (b) a halogen; (c) an alkyl chain optionally substituted by one or more halogen atom(s); (d) an alkenyl chain optionally substituted by one or more halogen atom(s); (e) an aryl group which is optionally substituted by one or more halogen atom(s) and which can comprise one or more heteroatoms; (f) an arylalkyl group optionally substituted by one or more halogen atom(s), it being possible for the aryl group to comprise one or more heteroatoms; or (g) a sulfonyl heavy halide group, with it being possible for R, when it is a group as defined in (c), (d), (e) and (f), to be substituted by a sulfonyl heavy halide group, said sulfonate salt being obtained from a sulfonyl chloride of general formula (II)Râ€”CF2â€”SO2Cl wherein R is as defined above, said process comprising at least one stage of alkaline hydrolysis of the sulfonyl chloride (II) in the presence of at least one compound acting as a phase transfer agent, said compound being either a cryptant, or a cation of onium type, or an alcohol.