Chromium-based fluorination catalyst, process for producing the catalyst, and fluorination process using the catalyst.

摘要

A halogenated hydrocarbon having 1 to 4 carbon atoms is brought into contact with hydrogen fluoride in a gaseous phase in the presence of a catalyst prepared by firing a substance composed mainly of chromium(III) hydroxide in the presence of hydrogen at a temperature of 350 to 500 DEG C or a catalyst prepared by heat-treating the above substance in an inert gas stream at a temperature of 100 to 600 DEG C and then firing the heat-treated compound in the presence of hydrogen at the above temperature or any one of catalysts prepared by partially fluorinating the above catalysts.