Fluorination catalyst regeneration

摘要

A method for regenerating a used fluorination catalyst such as a chromium-containing compound comprises contacting the used catalyst at a temperature of 300 DEG C. to 500 DEG C. with a mixture of an oxidizing agent, especially air, and hydrogen fluoride and optionally an inert diluent such as nitrogen, said mixture containing up to 30% of oxidizing agent on a molar basis. The method obviates chromium loss during regeneration/refluorination of spent catalyst and provides heated hydrogen fluoride for use directly in fluorination reactions.