METHOD FOR CO-PRODUCING VARIOUS HALOGENATED OLEFINS AND FLUOROALKANES

Disclosed is a method for co-producing various alkenyl halides and hydrofluoroalkanes: cis-1-chloro-3,3,3-trifluoropropene is introduced into a first reactor (1) to carry out an isomerization reaction in the presence of a first catalyst, and the reaction product is rectified to obtain a product trans-1-chloro-3,3,3-trifluoropropene; and 30-70wt% of trans-1-chloro-3,3,3 -trifluoropropene and hydrogen fluoride are mixed and then introduced into a second reactor (3) to carry out a reaction in the presence of a second catalyst to obtain a second reactor reaction product; the second reactor reaction product is introduced into a phase separator (4) for separation, and the obtained organic phase is rectified to obtain the products trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene and 1,1,1,3,3-pentafluoropropane. The invention has the advantages of simple process, high efficiency, high operaion flexibility, less investment and low energy consumption.