US3855151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of spent chromic fluoride catalysts
Assignee: EIDP Inc
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Filing: 1973-09-24
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Granted: 1974-12-17
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Expires: 1993-09-24
Abstract
Abstract Disclosed herein is a process for reactivating spent chromic fluoride catalyst which can be carbon-supported, comprising reacting the spent catalyst at elevated temperatures with selected chlorine-containing organic compounds and, in certain instances, chlorine. The catalyst is employed in vapor phase halogen exchange between hydrogen fluoride and chlorocarbon compounds to produce fluorocarbon compounds and chlorofluorocarbon compounds.
Inventors
- 👤 W Schindel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:49
CPC Classifications
C; C07; C07C; C07C19/00; C07C19/08; C07C19/10; C07C19/12; B; B01; B01J; B01J21/00; B01J21/20; B01J27/00; B01J27/06; B01J27/28; B01J27/32; B01J37/00; B01J37/22; B01J37/24; B01J38/00; B01J38/04; B01J38/42; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A PROCESS FOR REACTIVATING A SPENT CHROMIC (CR III) FLUORIDE HALOGEN-EXCHANGE CATALYST COMPRISING REACTING THE SPENT CATALYST AT ATEMPERATURE FROM ABOUT 300* TO 500*C., WITH A CHLORINE-SOURCE SELECTED FROM I. A SATURATED ORGANIC COMPOUND CONTAINING 1 OR 2 CARBON ATOMS, FROM 2 TO 6 CHLORINE ATOMS AND NO HYDROGEN ATOMS, CAPABLE OF DISSOCIATION AT REACTION TEMPERATURE TO PRODUCE CHLORINE AND II. A SATURATED ORGANIC COMPOUND CONTAINING 1 OR 2 CARBON ATOMS AND FROM 2 TO 6 CHLORINE ATOMS, NOT CAPABLE OF DISSOCIATION AT REACTION TEMPERATURES TO PRODUCE CHLORINE, AND CHLORINE THEREBY CONVERTING AT LEAST A PART OF THE CHROMIC FLUORIDE TO CHROMIC (CR III) CHLORIDE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR REACTIVATING A SPENT CHROMIC (CR III) FLUORIDE HALOGEN-EXCHANGE CATALYST COMPRISING REACTING THE SPENT CATALYST AT ATEMPERATURE FROM ABOUT 300* TO 500*C., WITH A CHLORINE-SOURCE SELECTED FROM I. A SATURATED ORGANIC COMPOUND CONTAINING 1 OR 2 CARBON ATOMS, FROM 2 TO 6 CHLORINE ATOMS AND NO HYDROGEN ATOMS, CAPABLE OF DISSOCIATION AT REACTION TEMPERATURE TO PRODUCE CHLORINE AND II. A SATURATED ORGANIC COMPOUND CONTAINING 1 OR 2 CARBON ATOMS AND FROM 2 TO 6 CHLORINE ATOMS, NOT CAPABLE OF DISSOCIATION AT REACTION TEMPERATURES TO PRODUCE CHLORINE, AND CHLORINE THEREBY CONVERTING AT LEAST A PART OF THE CHROMIC FLUORIDE TO CHROMIC (CR III) CHLORIDE.
Claim 3
Dependent Claim
38 words
A process according to claim 1 wherein the chlorine-source is an organic compound containing 1 or 2 carbon atoms, from 2 to 6 chlorine atoms and no hydrogen atoms, capable of dissociation at reaction temperatures to produce chlorine.
Claim 4
Dependent Claim
23 words
A process according to claim 2 wherein the chlorine-source is at least one member of the group carbon tetrachloride, phosgene, hexachloroethane and trichlorofluoromethane.
Claim 5
Dependent Claim
12 words
A process according to claim 3 wherein the chlorine-source is carbon tetrachloride.
Claim 6
Dependent Claim
11 words
A process according to claim 3 wherein the chlorine-source is phosgene.
Claim 7
Dependent Claim
11 words
A process according to claim 3 wherein the chlorine-source is hexachloroethane.
Claim 8
Dependent Claim
13 words
A process according to claim 6 wherein the hexachloroethane is formed in situ.
Claim 9
Dependent Claim
11 words
A process according to claim 3 wherein the chlorine-source is trichlorofluoromethane.
Claim 10
Dependent Claim
38 words
A process according to claim 1 wherein the chlorine-source is an organic compound containing 1 or 2 carbon atoms and from 2 to 6 chlorine atoms, not capable of dissociation at reaction temperatures to produce chlorine, and chlorine.
Claim 11
Dependent Claim
13 words
A process according to claim 9 wherein the chlorine-source is chloroform and chlorine.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |