公开(公告)号：US09873666B2

公开(公告)日：2018-01-23

申请号：US15021419

申请日：2014-09-11

Applicant: RHODIA OPERATIONS

Inventor： Denis Revelant ,  François Metz ,  Valery Dambrin ,  Marie Chauve

IPC: C07C309/00 ,  C07C313/04 ,  C07C303/32 ,  B01J31/02 ,  C07C303/02 ,  C07C313/02

CPC classification number: C07C313/04 ,  B01J31/0227 ,  C07C303/02 ,  C07C303/32 ,  C07C313/02 ,  Y02P20/582 ,  C07C309/06

Abstract: The invention concerns a method for preparing an oxysulphide and fluorinated derivative, said method comprising the reacting, in the presence of an organic solvent, of: i) at least one compound of formula Ea-COOR (I), in which Ea represents the fluorine atom or a group having 1 to 10 carbon atoms chosen from fluoroalkyls, perfluoroalkyls and fluoroalkenyls and R represents hydrogen, a monovalent cation or an alkyl group, and ii) a sulphur oxide, said method being such that the initial molar ratio (sulphur oxide/compound of formula (I)) is less than 0.4 and the concentration of sulphur oxide dissolved in the reaction medium is kept constant for the entire duration of the reaction to a value of between 0.2% and 3% by weight by means of continually adding said sulphur oxide to the reaction medium.