Patent ID: 6235950
Filing Date: 2001-05-22
Classification: C07C

Abstract:
A method for the preparation of a hydrofluorocarbon comprising the steps of:(a) chlorinating a ketone by reacting the ketone with elemental chlorine at a temperature in the range of from about 50.degree. C. to about 400.degree. C. to form a chlorinated ketone;(b) fluorinating the chlorinated ketone by reacting the chlorinated ketone with hydrofluoric acid in an amount effective to achieve at least 90% conversion at a temperature of from about 125.degree. C. to about 400.degree. C. in the presence of an inorganic metal catalyst to form a fluorinated ketone;(c) reducing the fluorinated ketone to form a fluorinated alcohol by reacting the fluorinated ketone with elemental hydrogen in the presence of a reduction catalyst at a temperature of from about 25.degree. C. to about 400.degree. C.; and(d) fluorinating the fluorinated alcohol to form a hydrofluorocarbon by reacting the fluorinated alcohol with elemental fluorine in the presence of an inert diluent.