Patent ID: 6590130
Filing Date: 2003-07-08
Classification: C07C,Y02P

Abstract:
A process for the preparation of 1, 1, 1-trifluoro-2,2-dichloroethane by contacting 1, 1, 1-trifluoro-2-chloroethane with chlorine in the presence of hydrogen fluoride and a mixed catalyst comprising nickel and a chromium oxide, halide, and/or oxyhalide on a support comprising aluminum fluoride or a mixture of aluminum fluoride and alumina at a temperature between 250Â° C. and 300Â° C. for a contact time between 10 and 60 seconds, with the chlorine to the 1, 1, 1-trifluoro-2-chloroethane molar ratio being between 0.05 and 0.15 and the hydrogen fluoride to the 1, 1, 1-trifluoro-2-chloroethane molar ratio being between 0.8 and 1.2.