Patent ID: 11912639
Assignee: THE CHEMOURS COMPANY FC, LLC
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 12:
13. 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.