Patent ID: 8299309

Claim:
A process for the manufacture of hydrofluoroalkenes of the structure R f CF═CHR, comprising reacting a hydrofluoroalkanol of structure R f CFXCHROH or a hydrofluoroalkoxide of structure R f CFXCHROMX, wherein M is a reactive metal in the +2 oxidation state, with a carboxylic acid anhydride and a reactive metal in a reaction solvent to form a hydrofluoroalkene, wherein R f is selected from the group consisting of perfluoromethyl, perfluoroethyl, perfluoro-n-propyl, perfluoro-i-propyl, perfluoeo-n-butyl and perfluoro-i-butyl, X is selected Cl, Br and I, and R is selected from the group consisting of H, CH 3 , C 2 H 5 , n-C 3 H 7 , and i-C 3 H 7 .