Method for manufacturing perfluorovinylethers

A process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B):

• RfO—CRf′X—CRf″Rf′″X′ (I-A)
• wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group;
• Rf′, Rf″ and Rf′″, equal or different from each other, independently represent fluorine atoms or C1-C5 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 Rf* and Rf*′, equal to or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups;
• Y1 and Y2, equal to or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups;
• X and X′ are as above defined;
• said process comprising the step of contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst, said catalyst comprising:
• palladium;
• at least one transition metal (M) selected from the group consisting of the metals of group VIIIB, other than palladium, and metals of group IB;
• and
• an inert carrier,
• wherein the molar ratio between palladium and the at least one transition metal (M) ranges from 2:1 to 1:5, and wherein the catalyst is prepared by a process where the inert carrier is impregnated with an aqueous solution comprising palladium and the at least one transition metal selected from ruthenium, copper and gold.