Patent ID: 8642820
Filing Date: 2014-02-04
Classification: C07C

Abstract:
1. A process for producing tetrafluoropropenes, which comprises contacting a raw material composition comprising 1-chloro-2,3,3,3-tetrafluoropropane and dichloropentafluoropropane and 1,1-dichloro-2,2,3,3,3-pentafluoropropane and at least one of its isomers, with an alkali aqueous solution in the presence of a phase-transfer catalyst, to produce 1,1-dichloro-2,3,3,3-tetrafluoropropene from the 1,1-dichloro-2,3,3,3-pentafluoropropane and to produce 2,3,3,3-tetrafluoropropene from the 1-chloro-2,3,3,3-tetrafluoropropane, wherein the reaction amount of 1 mol of the isomer of 1,1-dichloro-2,2,3,3,3-pentafluoropropane to form an isomer of 1,1-dichloro-2,3,3,3-tetrafluoropropene is less than 0.01 mol.