PROCESS FOR PRODUCING PERFLUOROALKANESULFINIC ACID SALT

摘要

Disclosed is a production process including the steps of reacting a perfluoroalkanesulfonyl halide with hydrazine to prepare a perfluoroalkanesulfinic acid hydrazinium salt (R f SO 2 H·N 2 H 4 ), forming a perfluoroalkanesulfinate salt by reaction of the prepared perfluoroalkanesulfinic acid hydrazinium salt with a base such as an alkali metal hydroxide, obtaining as a crystalline precipitate the perfluoroalkanesulfinate salt with the addition of an alkali metal fluoride or the like, and then, purifying the perfluoroalkanesulfinate salt to a high purity with the addition of an alkali metal halide or the like. As compared to conventional processes, the disclosed process is very useful for safe and easy industrial-scale production and for substantial reduction in wastes.