Process for the preparation of 1,1-dichloro-3,3,3-trifluoropropane
AssigneeHoneywell International Inc.
InventorJoseph J. Moscoe
Life of this patent
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Abstract
A convenient and economical process for the preparation of 1,1-dichloro-3,3,3-trifluoropropane (HCFC-243) by the reaction of 1,1,1,3,3-pentachloropropane (HCC-240) with hydrogen fluoride in the presence of an activated hydrofluorination catalyst. Also, the selective fluorination of hydrochlorocarbons and/or hydrochlorofluorocarbons, or mixtures thereof is shown. A HCFC-243 reaction product yield of greater than 40% is obtained.
Claims33
A process for the fluorination of 1,1,1,3,3-pentachloropropane to 1,1-dichloro-3,3,3-trifluoropropane comprising the steps of:
- (a) contacting a fluorination catalyst with hydrogen fluoride under conditions sufficient to produce an activated fluorination catalyst;
- and
- (b) reacting 1,1,1,3-pentachloropropane with hydrogen fluoride in the presence of said activated catalyst under conditions sufficient to produce a reaction product which comprises 1,1-dichloro-3,3,3-trifluoropropane;
- and then
- c) recovering a composition consisting essentially of 1,1-dichloro-3,3,3-trifluoropropane from the reaction product.
A process for the preparation of 1,1-dichloro-3,3,3-trifluoropropane comprising:
- a) introducing a fluorination catalyst into a vessel;
- b) introducing hydrogen fluoride into the vessel under conditions sufficient to produce an activated fluorination catalyst;
- c) adding 1,1,1,3,3-pentachloropropane and hydrogen fluoride to said vessel under conditions sufficient for the 1,1,1,3,3-pentachloropropane and hydrogen fluoride to react in the presence of said activated fluorination catalyst, thereby forming a reaction product which comprises 1,1-dichloro-3,3,3-trifluoropropane;
- and thereafter
- d) recovering a composition consisting essentially of 1,1-dichloro-3,3,3-trifluoropropane from the reaction product.
A process for the fluorination of 1,1,1,3,3-pentachloropropane to 1,1-dichloro-3,3,3-trifluoropropane comprising the steps of:
- (a) contacting a fluorination catalyst with hydrogen fluoride under conditions sufficient to produce an activated fluorination catalyst;
- and
- (b) reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in the presence of said activated catalyst under conditions sufficient to produce a reaction product which comprises from about 40% to about 70% 1,1-dichloro-3,3,3-trifluoropropane;
- and then
- C) recovering 1,1-dichloro-3,3,3-trifluoropropane from the reaction product.
Dependencies are inferred from the claim text.