INTEGRATED PROCESS TO PRODUCE 2,3,3,3-TETRAFLUOROPROPENE

摘要

The invention relates to a separation process whereby 2-chloro-3,3,3-trifluoropropene (1233xf) is separated from a mixture containing other fluorinated organics and high boiling materials such as dimers using azeotropes of HF formed by adding appropriate amounts to the mixture which facilitate separation by, e.g. distillation.

主权项

1. A separation process which comprises:
providing a first composition comprising
i) 2-chloro-3,3,3-trifluoropropene (1233xf),ii) one or more organics selected from the group consisting of trichlorofluoropropene (1231) isomers, 2,3-dichloro-3,3-difluoropropene (1232xf), 2-chloro-1,1,1,2-tetrafluoropropane (244bb), 1,1,1,2,2-pentafluoropropane (245cb), dichlorotrifluoropropane (243) isomers, trichlorodifluorpropane (242) isomers; adding HF to said first composition in an amount effective to form a second composition comprising HF-azeotropes of 1233xf and of at least one of the organics; and separating the HF azeotropes from the second composition.