Method for producing cis-1,3,3,3-tetrafluoropropene

摘要

A production method of cis-1,3,3,3-tetrafluoropropene according to the present invention includes the steps of: subjecting 1,1,1,3,3-pentafluoropropane to dehydrofluorination to form a reaction mixture (A) containing cis-1,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene and unreacted 1,1,1,3,3-pentafluoropropane; distilling the reaction mixture (A) to separate the trans-1,3,3,3-tetrafluoropropene from the reaction mixture (A) and collect a reaction mixture (B) containing the cis-1,3,3,3-tetrafluoropropene and the 1,1,1,3,3-pentafluoropropane; and reacting the reaction mixture (B) with a base and thereby obtaining the cis-1,3,3,3-tetrafluoropropene from the reaction mixture (B). This production method enables efficient production of high-purity cis-1,3,3,3-tetrafluoropropene and thus has industrial advantages.

主权项

1. A method for production of cis-1,3,3,3-tetrafluoropropene, comprising:
a first step of subjecting 1,1,1,3,3-pentafluoropropane to dehydrofluorination to form a reaction mixture containing cis-1,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene and unreacted 1,1,1,3,3-pentafluoropropane; a second step of distilling the reaction mixture formed by the first step to separate the trans-1,3,3,3-tetrafluoropropene from the reaction mixture and collect a reaction mixture containing the cis-1,3,3,3-tetrafluoropropene and 1,1,1,3,3-pentafluoropropane; and a third step of reacting the reaction mixture collected by the second step and containing the cis-1,3,3,3-tetrafluoropropene and 1,1,1,3,3-pentafluoropropane with a base and thereby obtaining the cis-1,3,3,3-tetrafluoropropene from the reaction mixture.