Patent ID: 8399721

Claim:
A process for the preparation of fluorine-containing olefins, comprising contacting a chlorofluoroalkene of the formula R f CCI═CCIR f wherein each R f is a perfluoroalkyl group independently selected from the group consisting of CF 3 , C 2 F 5 , n-C 3 F 7 , i-C 3 F 7 , n-C 4 F 9 , i-C 4 F 9 and t-C 4 F 9 , with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of at least one of the chlorine substituents of the chlorofluoroalkene with hydrogen to produce a product mixture comprising a fluorine-containing olefin of the formula E- or Z-R 1 CH═CHR 2 , wherein each of R 1 and R 2 are, perfluoroalkyl groups independently selected from the group consisting of CF 3 , C 2 F 5 , n-C 3 F 7 , i-C 3 F 7 , n-C 4 F 9 , i-C 4 F 9 and t-C 4 F 9 , wherein said catalyst is a composition comprising chromium and nickel.