METHOD FOR PREPARING 2,3,3,3-TETRAFLUOROPROPENE AND 2-CHLORO-3,3,3-TRIFLUOROPROPENE

摘要

Disclosed are a method for preparing 2-chloro-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene together. Raw materials pentachlorocyclopropane and anhydrous hydrogen fluoride undergo vapor phase fluorination and then three-stage separation is performed to obtain 2-chloro-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The preparation process provided by the present invention is novel and 2,3,3,3-tetrafluoropropene thus prepared can be used as a refrigerant in place of HFC-134a.