Patent ID: 8889925

Claim:
A process of fluorination of 1,1,2,3-tetrachloropropene comprising: (i) contacting 1,1,2,3-tetrachloropropene with hydrogen fluoride in a liquid phase in a solvent selected from the group consisting of 1,2-dichloroethane, 1,2,3-trichloropropane, 1-chloro-1-fluoroethane, 1,1-difluoroethane, 1,1-dichloroethane, 1,3-dichloro-1-fluorobutane, 1,1,1,3,3-pentafluorobutane, 1,1,2-trichloro-2,2-difluoroethane and mixtures thereof under conditions sufficient to form a reaction mixture comprising -HCl between 20 and 60%, HF between 10 and 40%, 2-chloro-3,3,3-trifluoropropene between 5 and 20%, 1,1,1,2-tetrafluoro-2-chloropropane between 0.5 and 5%, 2,3-dichloro-3,3-difluoropropene below 2% and solvent below 2%; (ii) separating the reaction mixture into a first stream comprising HCl, and a second stream comprising HF, 2-chloro-3,3,3-trifluoropropene and 1,1,1,2-tetrafluoro-2-chloropropane.