PRODUCTION OF PENTAFLUOROETHANE

摘要

A process for the production of pentafluoroethane which comprises contacting a hydrofluorochloroethane having the formula: C2H1Cl1+xF1+y wherein x and y are each independently 0, 1, 2 or 3 provided that x + y is 3, with hydrogen fluoride in the vapour phase and in the presence of a fluorination catalyst which comprises zinc or a compound of zinc and chromia, chromium fluoride or chromium oxyfluoride. This may be one step of a two-step process in which the hydrochlorofluoroethane is produced by contacting perchloroethylene with hydrogen fluoride in the vapour phase over the same or a different fluorination catalyst.