US5155082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the manufacture of chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons
Assignee: Honeywell International Inc
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Filing: 1991-04-12
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Granted: 1992-10-13
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Expires: 2011-04-12
Abstract
Abstract The invention relates to a novel catalyst and process for producing various chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons said catalyst prepared by co-extruding aluminum/chromium oxide and optionally impregnating the aluminum/chromium oxide support with a metal salt. The chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons, i.e., e.g., 1,1-dichloro-2,2,2-trifluoroethane, produced using the catalyst of the invention are useful in a variety of industrial applications including blowing agent, refrigerant, sterilant gas and solvent applications.
Inventors
- 👤 Hsueh S. Tung
- 👤 Addison M. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J37/00; B01J37/22; B01J37/26; C07C17/21
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
35 words
An aluminum/chromium oxide catalyst prepared by: (a) blending aluminum oxide hydroxide and chromium oxide together in the presence of a solvent; (b) extruding the blend; (c) calcining the blend; and (d) partially fluorinating the blend.
Claim 2
Dependent Claim
35 words
An aluminum/chromium oxide catalyst prepared by: (a) blending aluminum oxide hydroxide and chromium oxide together in the presence of a solvent; (b) extruding the blend; (c) calcining the blend; and (d) partially fluorinating the blend.
Claim 3
Dependent Claim
19 words
The catalyst of claim 1 wherein step (d) is accomplished by pretreating said catalyst before use with hydrogen fluoride.
Claim 4
Dependent Claim
23 words
The catalyst of claim 1 wherein said aluminum oxide hydroxide and chromium oxide have a median particle size of less than 100 microns.
Claim 5
Dependent Claim
23 words
The catalyst of claim 1 wherein said aluminum oxide hydroxide and chromium oxide have a median particle size of less than 50 microns.
Claim 6
Dependent Claim
22 words
The catalyst of claim 1 wherein said aluminum oxide hydroxide and chromium oxide have a particle size of less than 30 microns.
Claim 7
Dependent Claim
20 words
The catalyst of claim 1 wherein the mole ratio of aluminum to chromium oxide is about 95:5 to about 5:95.
Claim 8
Dependent Claim
16 words
The catalyst of claim 1 wherein following extrusion the catalyst is impregnated with a metal salt.
Claim 9
Dependent Claim
13 words
The catalyst of claim 7 wherein said metal salt is a metal halide.
Claim 10
Dependent Claim
23 words
The catalyst of claim 8 wherein said metal halide is selected from the group consisting of cobalt, nickel, manganese, rhodium and ruthenium halide.
Claim 11
Dependent Claim
10 words
The catalyst of claim 9 wherein said halide is chloride.
Claim 12
Dependent Claim
12 words
The catalyst of claim 9 wherein said metal halide is cobalt chloride.
Claim 13
Dependent Claim
26 words
The catalyst of claim 7 wherein the loading of the metal salt is from about 0.1 to about 20 weight percent of the mixed oxide support.
Claim 14
Dependent Claim
13 words
The catalyst of claim 2 wherein said catalyst is from 5-90 percent fluorinated.
Claim 15
Dependent Claim
13 words
The catalyst of claim 1 wherein said catalyst is from 5-90 percent fluorinated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |