AZEOTROPIC COMPOSITIONS OF 2-CHLORO-3,3,3-TRIFLUORO-1-PROPENE WITH HF AND OF 1,1,1,2,2-PENTAFLUOROPROPANE WITH HF

摘要

A process is disclosed for making CF₃CH₂CHF₂, CF₃CH═CHF and/or CF₃CH═CHCl. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX₃CHClCH₂X, halopropenes of the formula CX₃CCl═CH₂ and halopropenes of the formula CX₂═CClCH₂X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCl, CF₃CH₂CHF₂, CF₃CH═CHF and CF₃CH═CHCl; and recovering the CF₃CH₂CHF₂, CF₃CH═CHF and/or CF₃CH═CHCl from the product mixture. Also disclosed is a process for making CF₃CF₂CH₃ and/or CF₃CF═CH₂. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX₃CHClCH₂X, halopropenes of the formula CX₃CCl═CH₂ and halopropenes of the formula CX₂═CClCH₂X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCl, CF₃CF₂CH₃ and CF₃CF═CH₂; and recovering the CF₃CF₂CH₃ and/or CF₃CF═CH₂ from the product mixture. In each of the processes the molar ratio of HF to total amount of starting material fed to the reaction zone is at least stoichiometric. Also disclosed is an azeotropic composition comprising CF₃CCl═CH₂, and HF. Also disclosed is an azeotropic composition comprising CF₃CF₂CH₃, and HF.