PRODUCTION OF HYDROFLUOROALKANES

摘要

A process for the production of a hydrofluoroalkane, particularly 1,1,1,2-tetrafluoroethane or pentafluoroethane, which comprises contacting a hydrochlorofluoroethane or a hydrochlorofluoroethene with hydrogen fluoride and a fluorination catalyst and recovering a hydrofluoroalkane from the resulting products, the hydrochlorofluoroethane having the formula CClXYCFHZ and the hydrochlorofluoroethene having the formula CClA=CFZ wherein X and Y are each independently chlorine or fluorine, Z is chlorine or hydrogen and A is chlorine or fluorine provided that where each of X and Y is fluorine then Z is hydrogen. A preferred embodiment of the process is the production of 1,1,1,2-tetrafluoroethane from the hydrochlorofluoroethene CCl2=CFH.