Patent ID: 8802899

Claim:
A process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): R f O—CR f ′X—CR f ″R f ′″X′ (I-A) wherein R f represents a C 1 -C 6 perfluoro(oxy)alkyl group; R f ′, R f ″ and R f ″′, equal to or different from each other, independently represent fluorine atoms or C 1 -C 5 perfluoro(oxy)alkyl groups; X and X′, equal to or different from each other, are independently selected from the group consisting of Cl, Br, and I; wherein R f * and R f *′, equal to or different from each other, independently represent fluorine atoms or C 1 -C 3 perfluoro(oxy)alkyl groups; Y 1 and Y 2 , equal to or different from each other, independently represent fluorine atoms or C 1 -C 3 perfluoroalkyl groups; X and X′ are the same as for formula (I-A); said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising at least one transition metal of group VIII B at a temperature of at most 340° C., wherein the process is carried out in gas-phase.