Vapor phase process for making 1,1,1,3,3-pentafluoropropane and 1-chloro-3,3,3-trifluoropropene
AssigneeAlliedSignal Inc.
InventorHsueh Sung Tung
Life of this patent
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Abstract
A method for the preparation of 1,1,1,3,3-pentafluoropropane (HFC-245fa) and 1-chloro-3,3,3-trifluoropropene (HCFC-1233). 1,1,1,3,3-pentachloropropane (HCC-240fa) is fluorinated with HF in a vapor phase in the presence of a vapor phase catalyst. The HCFC-1233 and any co-produced 1,3,3,3-tetrafluoropropene (HFC-1234) are recycled for further fluorination by HF for a greater than 99% HCC-240fa conversion.
Claims24
A process for the preparation of 1,1,1,3,3-pentafluoropropane comprising the steps of:
- (a) conducting a fluorination reaction by reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a reactor in the vapor phase and in the presence of a fluorination catalyst, thereby forming a reaction product comprising HCl, 1,1,1,3,3-pentafluoropropane, 1-chloro-3,3,3-trifluoropropene and 1,3,3,3-tetrafluoropropene;
- (b) separating 1,1,1,3,3-pentafluoropropane from said reaction product;
- and
- (c) subsequently recycling the 1-chloro-3,3,3-trifluoropropene and/or 1,3,3,3-tetrafluoropropene to a liquid phase reactor for reaction with HF to thereby produce additional 1,1,1,3,3 -pentafluoropropane.
A process for the preparation of 1,1,1,3,3-pentafluoropropane comprising the steps of:
- (a) conducting a fluorination reaction by reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a reactor in the vapor phase and in the presence of a fluorination catalyst, thereby forming a reaction product comprising HCl, 1,1,1,3,3-pentafluoropropane, 1-chloro-3,3,3-trifluoropropene and 1,3,3,3-tetrafluoropropene;
- and
- (b) separating 1,1,1,3,3-pentafluoropropane from said reaction product wherein said fluorination reaction is conducted with a fluorination catalyst selected from the group consisting of, chromium, aluminum, cobalt, manganese, nickel and iron oxides, hydroxides, halides, oxyhalides and inorganic salts thereof.
A process for the preparation of 1-chloro-3,3,3-trifluoropropene which comprises:
- (a) conducting a fluorination reaction by reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a reactor in the vapor phase and in the presence of a fluorination catalyst, thereby forming a reaction product comprising HCl, 1,1,1,3,3-pentafluoropropane, 1-chloro-3,3,3-trifluoropropene and 1,3,3,3-tetrafluoropropene, and
- (b) separating 1-chloro-3,3,3-trifluoropropene from said reaction product.
A process for the preparation of 1,1,1,3,3-pentafluoropropane which comprises:
- (a) conducting a fluorination reaction by reacting one or more components comprised of 1,1-dichloro-3,3,3-trifluoropropane, 1-chloro-1,3,3,3,-tetrafluoropropane or 1,1,3-trichloro-3,3-difluoropropane with hydrogen fluoride in a reactor in the vapor phase and in the presence of a fluorination catalyst, thereby forming a reaction product comprising HCl, 1,1,1,3,3-pentafluoropropane, 1-chloro-3,3,3-trifluoropropene and 1,3,3,3-tetrafluoropropene, and
- (b) separating 1,1,1,3,3-pentafluoropropane from said reaction product wherein said fluorination reaction is conducted with a fluorination catalyst selected from the group consisting of, chromium, aluminum, cobalt, manganese, nickel and iron oxides, hydroxides, halides, oxyhalides and inorganic salts thereof.
A process for the preparation of 1-chloro-3,3,3-trifluoropropene which comprises:
- (a) conducting a fluorination reaction by reacting one or more components comprised of 1,1-dichloro-3,3,3-trifluoropropane, 1-chloro-1,3,3,3,-tetrafluoropropane or 1,1,3-trichloro-3,3-difluoropropane with hydrogen fluoride in a reactor in the vapor phase and in the presence of a fluorination catalyst, thereby forming a reaction product comprising HCl, 1,1,1,3,3-pentafluoropropane, 1-chloro-3,3,3-trifluoropropene and 1,3,3,3-tetrafluoropropene, and
- (b) separating 1-chloro-3,3,3-trifluoropropene from said reaction product.
Dependencies are inferred from the claim text.