Process for the synthesis of fluorinated sulfonic acids

摘要

Process for the preparation of a fluorinated sulphonic acid compound by hydrolysis of a corresponding fluorinated sulphonyl fluoride in the presence of a tertiary amine, comprising steps of (a) recovering a mixture of a salt of the fluorinated sulphonic acid with the tertiary amine and an ammonium fluoride salt of the tertiary amine; (b) distilling off the tertiary ammonium fluoride salt and leaving a distillation remanence containing the salt of the fluorinated sulphonic acid with the tertiary amine; and (c) recovering the fluorinated sulphonic acid compound from the distillation remanence.