Patent ID: 9394247
Filing Date: 2016-07-19
CPC Classification: C07C

Claim Text:
1. A process for preparing an aqueous solution of sulfonimide compound of formula (Rf 1 —SO 2 )(Rf 2 —SO 2 )NH, Rf 1 and Rf 2 being chosen, independently of each other, from the group consisting of: a fluorine atom and groups containing from 1 to 10 carbon atoms chosen from perfluoroalkyl, fluoroalkyl, fluoroalkenyl and fluoroallyl groups, the process comprising a step of oxidizing a mixture M1, wherein mixture M1 comprises (Rf 1 —SO 2 )(Rf 2 —SO 2 )NH, Rf 1 SO 2 H and/or Rf 2 SO 2 H, Rf 1 SO 2 NH 2 and/or Rf 2 SO 2 NH 2 , with an oxidizing agent, to obtain a mixture M2 comprising (Rf 1 —SO 2 )(Rf 2 —SO 2 )NH, Rf 1 SO 3 H and/or Rf 2 SO 3 H, and Rf 1 SO 2 NH 2 and/or Rf 2 SO 2 NH 2 .