US4069266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of fluorine-rich organic compounds containing one or two carbon atoms
Assignee: Central Glass Co Ltd
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Filing: 1977-01-25
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Granted: 1978-01-17
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Expires: 1997-01-25
Abstract
Abstract A process for preparing fluorine-rich organic compounds containing one or two carbon atoms from organic fluoro compounds of lower fluorine content in which starting partially or completely halogenated fluoro carbon compounds having at least one halogen atom other than fluorine, e.g., CHCl 2 F, CHClF 2 , CCl 2 F 2 , CCl 3 F, C 2 Cl 3 F 3 , C 2 Cl 2 F 4 and C 2 Cl 4 F 2 , are contacted under disproportionation conditions with a catalyst system of a specific type which comprises 0.1 - 5% by weight, as metal, of a nickel(II) halide, titanium(III) chloride or titanium(III) fluoride and a balance of an aluminum compound such as activated alumina, silica, alumina or aluminum fluoride.
Inventors
- 👤 Tadaaki Komatsu
- 👤 Hirokazu Takeda
- 👤 Hideki Oshio
- 👤 Kimiaki Matsuoka
- 👤 Minoru Aramaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:39
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/37
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A process for disproportionating a partially or completely halogenated fluoro derivative of methane containing not more than two fluorine atoms and at least one halogen atom other than fluorine or a completely halogenated fluoro derivative of ethane containing from 2 to 4 halogen atoms other than fluorine and correspondingly from 4 to 2 fluorine atoms, the process comprising contacting said derivative of methane or said derivative of ethane in gas phase and in a substantially moisture-free state under disproportionation conditions of a temperature of 100 to 600° C and a space velocity of from 50 to 1000/hr, with a catalyst substantially composed of from 0.1 to 5.0% by weight, as metal, of a metal salt selected from the group consisting of nickel (II) halides, titanium (III) chloride and titanium (III) fluoride and a balance of a compound selected from the group consisting of activated alumina, silica.alumina and aluminum fluoride.
Claim 2
Dependent Claim
149 words
A process for disproportionating a partially or completely halogenated fluoro derivative of methane containing not more than two fluorine atoms and at least one halogen atom other than fluorine or a completely halogenated fluoro derivative of ethane containing from 2 to 4 halogen atoms other than fluorine and correspondingly from 4 to 2 fluorine atoms, the process comprising contacting said derivative of methane or said derivative of ethane in gas phase and in a substantially moisture-free state under disproportionation conditions of a temperature of 100 to 600° C and a space velocity of from 50 to 1000/hr, with a catalyst substantially composed of from 0.1 to 5.0% by weight, as metal, of a metal salt selected from the group consisting of nickel (II) halides, titanium (III) chloride and titanium (III) fluoride and a balance of a compound selected from the group consisting of activated alumina, silica.alumina and aluminum fluoride.
Claim 3
Dependent Claim
42 words
A process according to claim 1, wherein said derivative of methane is CHCl 2 F or CHClF 2 , and the disproportionation is conducted at a temperature of from 200° to 300° C at a space velocity of from 200 to 500/hr.
Claim 4
Dependent Claim
52 words
A process according to claim 1, wherein said derivative of methane is chlorodifluoromethane, CHClF 2 , the disproportionation is conducted at a temperature of from 200° to 300° C at a space velocity of from 200 to 500/hr, and said metal salt is nickel (II) chloride and said compound is β-aluminum fluoride.
Claim 5
Dependent Claim
51 words
A process according to claim 1, wherein said derivative of methane is chlorodifluoromethane, CHClF 2 , the disproportionation is conducted at a temperature of from 200° to 300° C at a space velocity of from 200 to 500/hr, and said metal salt is nickel (II) chloride and said compound is silica.alumina.
Claim 6
Dependent Claim
69 words
A process according to claim 1, wherein said derivative of methane is chlorodifluoromethane, CHCl 2 F, the disproportionation is conducted at a temperature of from 200° to 300° C at a space velocity of from 200 to 500/hr, and said catalyst is NiCl 2 - or TiCl 3 -activated alumina which is subsequently treated for activation with anhydrous hydrogen fluoride at a temperature of from 300° to 400° C.
Claim 7
Dependent Claim
33 words
A process according to claim 1, wherein said derivative of methane is dichlorodifluoromethane, the disproportionation is conducted at a temperature of from 200° to 300° C at a space velocity of about 200/hr.
Claim 8
Dependent Claim
33 words
A process according to claim 1, wherein said derivative of ethane is trichlorotrifluoroethane and the disproportionation is conducted at a temperature of about 300° C and at a space velocity of about 140/hr.
References Cited (Backward Citations)
US3087974A
Cited
US3651156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |