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US4465786A
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Catalyst composition for the preparation of 3,3,3-trifluoropropene
Assignee: General Electric Co
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Filing: 1982-09-27
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Granted: 1984-08-14
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Expires: 2002-09-27
Abstract
Abstract A catalyst composition useful in preparing 3,3,3-trifluoropropene by the reaction of hydrogen fluoride gas with a halogenated hydrocarbon is provided. A novel catalyst is prepared by simultaneous fluorination of chromium and aluminum oxides. This or conventional chromium oxyfluoride compounds may additionally be activated by contact with chlorine or pentachloroethane. A process for the preparation of 3,3,3-trifluoropropene is also contemplated.
Inventors
- 👤 Mark F. Zimmer
- 👤 William E. Smith
- 👤 Donald F. Malpass, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:14
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; B01J37/00; B01J37/22; B01J37/26; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A catalyst composition for promoting fluorination of a halogenated hydrocarbon by vapor-phase reaction with hydrogen fluoride comprising a chromium oxyfluoride compound prepared by simultaneous fluorination of an intimate admixture of chromium trioxide and alumina and activated by contact with an activating agent selected from the group consisting essentially of chlorine and pentachloroethane.
Claim 2
Dependent Claim
52 words
A catalyst composition for promoting fluorination of a halogenated hydrocarbon by vapor-phase reaction with hydrogen fluoride comprising a chromium oxyfluoride compound prepared by simultaneous fluorination of an intimate admixture of chromium trioxide and alumina and activated by contact with an activating agent selected from the group consisting essentially of chlorine and pentachloroethane.
Claim 3
Dependent Claim
13 words
A catalyst as defined in claim 1, wherein said activating agent is chlorine.
Claim 4
Dependent Claim
13 words
A catalyst as defined in claim 1, wherein said activating agent is pentachloroethane.
Claim 5
Independent Claim
61 words
A method for preparing a solid catalyst composition useful for promoting fluorination of a halogenated hydrocarbon by vapor-phase reaction with hydrogen fluoride comprising admixing a major proportion of chromium trioxide and a minor proportion of alumina; adding the admixture to aqueous hydrofluoric acid; drying the reaction product; and exposing the dried product to oxygen at a temperature of 350° C.-750° C.
Claim 6
Independent Claim
61 words
A method for preparing a solid catalyst composition useful for promoting fluorination of a halogenated hydrocarbon by vapor-phase reaction with hydrogen fluoride comprising admixing a major proportion of chromium trioxide and a minor proportion of alumina; adding the admixture to aqueous hydrofluoric acid; drying the reaction product; and exposing the dried product to oxygen at a temperature of 350° C.-750° C.
Claim 7
Dependent Claim
30 words
A method as defined in claim 4 which further comprises activating said product by contacting it with an activating agent selected from the group consisting essentially of chlorine and pentachloroethane.
Claim 8
Dependent Claim
21 words
A method as defined in claim 4 which further comprises promoting said catalyst by contacting it with a chlorinated organic compound.
Claim 9
Dependent Claim
14 words
A method as defined in claim 6, wherein the chlorinated organic compound is 1,1-dichloroethane.
Claim 10
Dependent Claim
14 words
A method as defined in claim 6, wherein the chlorinated organic compound is hexachloroethane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |