PROCESS FOR THE SYNTHESIS OF TETRAFLUOROETHANESULFONIC ACID

摘要

The present invention provides a process for preparation of tetrafluoroethanesulfonic acid. The halogenated compounds, such as fluoro alkane sulfonic acids, have wide applications as super acids. In a preferred embodiment, the process for preparation of tetrafluoroethanesulfonic acid, comprises a) treating alkali metal salt of tetrafluoroethanesulfonic acid in an aliphatic alcohol solvent with dry hydrochloric acid, b) treating mixture of step a) with water to obtain tetrafluoroethanesulfonic acid monohydrate, and c) dehydrating tetrafluoroethanesulfonic acid monohydrate to obtain tetrafluoroethanesulfonic acid.