Patent ID: 6156943
Filing Date: 2000-12-05
Classification: C07C

Abstract:
A process for producing a hydrohaloolefin from the group consisting of CF.sub.2 .dbd.C(CH.sub.2 RF)CF.sub.3, FRCF.dbd.C(CH.sub.2 RF)CF.sub.3 and FRCF.dbd.C(CH.sub.2 RF)(CF.sub.2 RF) wherein each R is a difunctional group of the formula --C.sub.2 F.sub.2 XY-- where X and Y are attached to the same carbon, wherein X is selected from the group consisting of H, Br, Cl and F and wherein Y is selected from the group consisting of F and CF.sub.3, comprising:reacting the olefin (CF.sub.3).sub.2 C.dbd.CH.sub.2 with a second olefin of the formula CF.sub.2 .dbd.CXY in the liquid phase in the presence of a Lewis acid catalyst selected from the group consisting of antimony pentafluoride and aluminum chlorofluoride.