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US 9,315,431 B2Granted
Process of fluorination in liquid phase
AssigneeArkema France
InventorAnne Pigamo
Life of this patent
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Abstract
The present invention provides a process of fluorination in liquid phase in a solvent medium of a compound of formula (II) CX1X2=CZCX3X4X5, in which Z represents H, Cl or F, and each X1 represents independently hydrogen or chlorine, given that at least one of the X1 represents a chlorine.
Claims16
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, under conditions sufficient to form a reaction mixture comprising 2-chloro-3,3,3-trifluoropropene, HCl, HF and 1,1,1,2-tetrafluoro-2-chloropropane, wherein the solvent is 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 and 1,1,2-trichloro-2,2-difluoroethane, or a mixture thereof;
- and
- (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.
Dependencies are inferred from the claim text.