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US4374289A
Expired / Lapsed
US
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Production of monofluorotrichloroethane
Assignee: Honeywell International Inc
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Filing: 1981-10-22
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Granted: 1983-02-15
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Expires: 2001-10-22
Abstract
Abstract 1-Fluoro-1,1,2-trichloroethane is produced by a process which comprises the reaction of trichloroethylene with hydrogen fluoride using about 1.5 to 3.5 moles of hydrogen fluoride per mole of trichloroethylene, and conducting the reaction in the presence of a catalyst selected from the group consisting of CF 3 SO 3 H, TiCl 4 , MoCl 5 , WF 6 , NbCl 5 and SnCl 4 at a temperature in the range of 50° to 150° C. with a residence time of one quarter hour to five hours. The resulting product is relatively pure of overfluorinated by-products so as to be useful as a degreasing solvent.
Inventors
- 👤 Michael Van Der Puy
- 👤 Ronald F. Piskorz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:56
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/07; C07C17/087
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
A method for the production of 1-fluoro-1,1,2-trichloroethane which comprises reacting trichloroethylene with hydrogen fluoride using about 1.5 to 3.5 moles of hydrogen fluoride per mole of trichloroethylene, and conducting the reaction in the presence of tungsten hexafluoride at a temperature range of about 50° to 150° C. for a residence time of about one-fourth hour to five hours.
Claim 2
Independent Claim
58 words
A method for the production of 1-fluoro-1,1,2-trichloroethane which comprises reacting trichloroethylene with hydrogen fluoride using about 1.5 to 3.5 moles of hydrogen fluoride per mole of trichloroethylene, and conducting the reaction in the presence of tungsten hexafluoride at a temperature range of about 50° to 150° C. for a residence time of about one-fourth hour to five hours.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein about 2.0 to 3.0 moles of hydrogen fluoride are used per mole of trichloroethylene.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein about 0.05 to 0.2 moles of catalyst are used per mole of trichloroethylene.
Claim 5
Dependent Claim
22 words
A method according to claim 1 wherein the reaction is conducted in pressure reactor under pressure of about 175 to 250 psig.
References Cited (Backward Citations)
US4258225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |