Method of making 1,1,3,3,3-pentafluoropropene
AssigneeHoneywell International Inc.
InventorsHsueh Tung, Daniel Merkel, Rajiv Singh
Life of this patent
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Abstract
The invention provides an economic process for the manufacture of the hydrofluorocarbon 1,1,3,3,3-pentafluoropropene (HFC-1225zc). HFC-1225zc can be made from the dehydrochlorination of 1-chloro-1,1,3,3,3-pentafluoropropane (HCFC-235fa). Alternatively, HFC-1225zc can also be made from the dehydrofluorination of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa). HFC-1225zc) is a compound that has the potential to be used as a low Global Warming Potential refrigerant, blowing agent, aerosol propellant, or solvent.
Claims68
A process for the manufacture of 1,1,3,3,3-pentafluoropropene comprising
- a) reacting 1,1,1,3,3,3-hexachloropropane with hydrogen fluoride, in the presence of a fluorination catalyst to thereby produce a product comprising 1,1,1,3,3,3-hexafluoropropane and optionally additionally 1-chloro-1,1,3,3,3-pentafluoropropane;
- and then
- b) reacting the 1,1,1,3,3,3-hexafluoropropane and optionally additionally 1-chloro-1,1,3,3,3-pentafluoropropane, with a caustic under conditions sufficient to dehydrofluorinate 1,1,1,3,3,3-hexafluoropropane and optionally additionally dehydrochlorinate 1-chloro-1,1,3,3,3-pentafluoropropane, to form a reaction product which comprises 1,1,3,3,3-pentafluoropropene.
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A process for the manufacture of 1,1,3,3,3-pentafluoropropene comprising
- a) reacting 1,1,1,3,3,3-hexachloropropane with hydrogen fluoride in the presence of a fluorination catalyst to thereby produce a product comprising at least one of 1,1,1,3,3,3-hexafluoropropane and 1-chloro-1,1,3,3,3-pentafluoropropane;
- and then
- b) thermally decomposing the 1-chloro-1,1,3,3,3-pentafluoropropane and/or 1,1,1,3,3,3-hexafluoropropane, under conditions sufficient to to form a reaction product which comprises 1,1,3,3,3-pentafluoropropene and wherein the decomposing is optionally conducted with a catalyst comprising supported transition metal halides supported transition metal oxides, bulk transition metal oxides or combinations thereof.
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