Patent ID: 9328043
Filing Date: 2016-05-03
CPC Classification: C07C,Y02P

Claim Text:
1. A process for preparing 2-chloro-3,3,3-trifluoropropene comprising: providing a composition comprising at least one starting compound of formula I, II and/or formula III wherein X is independently selected from F, Cl, Br, and I, provided that at least one X is not fluorine; (a) contacting said starting composition with a fluorinating agent to produce a final composition comprising 2-chloro-3,3,3-trifluoropropene, HCl, unreacted HF, optional unreacted starting compound, and one or more by-products 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), trichlorodifluorpropane (242), C (b) separating the final composition into a first stream comprising 2-chloro-3,3,3-trifluoropropene and HCl and a second stream comprising the optional unreacted starting compound, the one or more by-products, and unreacted HF; (c) separating the 2-chloro-3,3,3-trifluoropropene of the first stream from the HCl; (d) separating the unreacted HF of the second stream from the optional unreacted starting compound and one or more by-products; and (e) separating and recycling recyclable by-product(s) to contacting step (a).