BIS-PERFLUOROALKYLSULEONYLIMIDE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To produce a bis-perfluoroalkylsulfonylimide by conversion from a metal salt of the bis-perfluoroalkylsulfonylimide by contact of its aqueous solution with a solid ion exchanger of hydrogen ion type. SOLUTION: This bis-perfluoroalkylsulfonylimide is easily produced, without use of concentrated sulfuric acid, at high purity by bringing a metal salt of the sulfonylimide into contact with a solid ion exchanger of hydrogen ion type without substantially containing such impurities as a slight quantities of sulfuric acid and perfluoroalkysulfonic acid which are liable to be contained in the sulfonylimide formed by the use of concentrated sulfuric acid.