Patent ID: 7638660
Filing Date: 2009-12-29
Classification: C01B,C07C,Y02P

Abstract:
1. A process for the production of trans-1,3,3,3-tetrafluoropropene which comprises: (a) dehydrofluorinating 1,1,1,3,3-pentafluoropropane to thereby produce a result comprising cis-1,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene and hydrogen fluoride; (b) optionally recovering hydrogen fluoride from the result of step (a); (c) isomerizing at least a portion of the cis-1,3,3,3-tetrafluoropropene into trans-1,3,3,3-tetrafluoropropene, forming a remaining mixture; and (d) recovering trans-1,3,3,3-tetrafluoropropene from the remaining mixture, and then recycling the remaining mixture to step (a).