Processes for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same
AssigneeThe Chemours Company Fc, LLC
InventorsSheng Peng, Allen Capron Sievert
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Abstract
Processes for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same. A process for producing 2-chloro-1,1,1,4,4,4-hexafluorobutane comprises contacting 1,1,2,4,4-pentachlorobuta-1,3-diene with HF in the liquid phase in the presence of a fluorination catalyst. A process for producing 2,2-dichloro-1,1,1,4,4,4-hexafluorobutane comprises contacting 2-chloro-1,1,1,4,4,4-hexafluorobutane with a chlorine source. A process for producing 1,1,1,4,4,4-hexafluoro-2-butyne comprises contacting 2,2-dichloro-1,1,1,4,4,4-hexafluorobutane with a base. A process for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene comprises contacting 1,1,1,4,4,4-hexafluoro-2-butyne with hydrogen.
Claims16
A process for producing 2,2-dichloro-1,1,1,4,4,4-hexafluorobutane comprising:
- contacting 2-chloro-1,1,1,4,4,4-hexafluorobutane with a chlorine source.
A process for producing Z-1,1,1,4,4,4-hexafluoro-2-butene comprising:
- (a) contacting trichloroethylene with a dimerization catalyst to produce a product mixture comprising 1,1,2,4,4-pentachlorobuta-1,3-diene;
- (b) contacting 1,1,2,4,4-pentachlorobuta-1,3-diene with HF in the liquid phase in the presence of a fluorination catalyst in the liquid phase to form a product mixture comprising 2-chloro-1,1,1,4,4,4-hexafluorobutane,
- (c) contacting 2-chloro-1,1,1,4,4,4-hexafluorobutane with a chlorine source to form a product mixture comprising 2,2-dichloro-1,1,1,4,4,4-hexafluorobutane;
- (d) contacting 2,2-dichloro-1,1,1,4,4,4-hexafluorobutane with base to produce a product mixture comprising 1,1,1,4,4,4-hexafluoro-2-butyne;
- and
- (e) contacting 1,1,1,4,4,4-hexafluoro-2-butyne with hydrogen produce a product mixture comprising Z-1,1,1,4,4,4-hexafluoro-2-butene.
A composition comprising 2-chloro-1,1,1,4,4,4-hexafluorobutane, Z-1,1,1,4,4,4-hexafluoro-2-chloro-2-butene, 1,2-dichloro-1,1,4,4,4-pentafluorobutane, E-1,1,1,4,4,4-hexafluoro-2-butene, and 1,1-dichloro-2,2,4,4,4-pentafluorobutane.
A composition comprising 2-chloro-1,1,1,4,4,4-hexafluorobutane, 1,1,1,4,4,4-hexafluorobutane, 1,1,1-trifluoro-2-trifluoromethylbutane, Z-1,1,1,4,4,4-hexafluoro-2-chloro-2-butene, E-1,1,1,4,4,4-hexafluoro-2-chloro-2-butene, Z-1,1,1,4,4,4-hexafluoro-2,3-dichlorobutene, and E-1,1,1,4,4,4-hexafluoro-2,3-dichlorobutene.
Dependencies are inferred from the claim text.