Fluorination in the vapour phase using crystallized catalysts.

摘要

The invention relates to the gas phase catalytic fluorination of saturated halogenated aliphatic hydrocarbons by means of HF. Use is made of a bulk or supported catalyst based on chromium oxide or on chromium oxides and on at least one other catalytically active metal in which the major part of the oxide or oxides is in the crystalline state. For a bulk catalyst, the specific surface, after activation with HF, is at least equal to 8 m<2>/g.