| abstract |
A method for efficiently obtaining trans-1,3,3,3-tetrafluoropropene by reusing unreacted substances. 1-Chloro-3,3,3-trifluoropropene and HF are reacted to produce trans-1,3,3,3-tetrafluoropropene and unreacted 1-chloro-3,3,3-tri Reaction step for obtaining a product containing fluoropropene and HF, by-produced cis-1,3,3,3-tetrafluoropropene, 1,1,1,3,3-pentafluoropropane and HCL, distillation of the product A crude separation step of recovering 1-chloro-3,3,3-trifluoropropene and HF and supplying them to the reaction step, a hydrogen fluoride separation step of recovering HF from the residue after the step and supplying it to the reaction step; There is a hydrogen chloride separation step in which the residue after the step is brought into contact with water or an aqueous NaOH solution to remove HCL, a drying step for dehydrating the residue after the step, and a purification step for distilling the residue after the step. [Selection figure] None |