Co-production preparation method of 2, 3, 3, 3-tetrafluoropropene and 1-chloro-2, 3, 3, 3-tetrafluoropropene

The invention relates to a co-production preparation method of 2, 3, 3, 3-tetrafluoropropene and 1-chloro-2, 3, 3, 3-tetrafluoropropene, which comprises the following steps: A1, a telomerization step: carrying out pressurized telomerization reaction on monofluoromethane chloride and trifluoroethylene under the action of a telomerization catalyst to obtain 3-chloro-1, 1, 1, 2-tetrafluoropropane; the telomerization catalyst is a Lewis acid catalyst or a mixed catalyst of the Lewis acid catalyst and dichloromethane; and A2, a removal step: the 3-chloro-1, 1, 1, 2-tetrafluoropropane is subjected to dehydrochlorination and dehydrogenation reactions at the same time under the action of an activated carbon supported noble metal catalyst to obtain 2, 3, 3, 3-tetrafluoropropene and 1-chloro-2, 3, 3, 3-tetrafluoropropene, and the activated carbon supported noble metal catalyst is at least one of Pd/AC and Pt/AC. The method has the advantages of simple process, mild reaction conditions, high target product yield and the