Method of making fluorocarbon chlorides and bromides by thermal chlorination and bromination of fluorocarbon hydrides

Claim 1

A THERMAL REPLACEMENT METHOD OF CHLORINATION AND BROMINATION OF COMPOUNDS OF THE CLASS CONSISTING OF SATURATED FLUOROCARBON MONOHYDRIDES AND DIHYDRIDES AND PARTIALLY CHLORINATED AND BROMINATED DERIVATIVES THEREOF, WHEREIN THE MOLECULE CONTAINS AT LEAST ONE REPLACEABLE HYDROGEN ATOM AND THE NUMBER OF FLUORINE ATOMS EXCEEDS THE NUMBER OF CARBON ATOMS WITH AT LEAST ONE FLUORINE ATOM BONDED TO EACH CARBON ATOM, INCLUDING THE STEPS OF HEATING A GASEOUS MIXTURE OF A COMPOUND OF THE DEFINED CLASS AND A HALOGEN OF THE CLASS CONSISTING OF CHLORINE AND BROMINE, AT A HIGH TEMPERATURE SUFFICIENT TO CAUSE THERMAL REPLACEMENT OF HYDROGEN BY SAID HALOGEN BUT INSUFFICIENT TO CAUSE SUBSTANTIAL PYROLYSIS, BY PASSING THE GASEOUS MIXTURE THROUGH A HEATED TUBE MAINTAINED AT A TEMPERATURE OF THE ORDER OF 500-600* C., AND RECOVERING AS A MAJOR PRODDUCT OF HALOGENATED REACTION PRODUCT HAVING THE SAME NUMBER OF CARBON ATOMS WHEREIN HYDROGEN HAS BEEN REPLACED BY HALOGEN.