Patent US3178484A successfully refreshed from Google Patents.
US3178484A
Expired / Lapsed
US
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Process for preparing vinyl fluoride and 1, 1-difluoroethane
Assignee: EIDP Inc
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Filing: 1962-11-08
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Granted: 1965-04-13
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Expires: 1982-11-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Joseph Christoph
- 👤 Teufer Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:35
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C07; C07C; C07C17/00; C07C17/07; C07C17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR PREPARING VINYL FLUORIDE AND 1,1-DIFLUOROETHANE WHICH PROCESS COMPRISES PASSING A MIXTURE OF HYDROGEN FLUORIDE AND ACETYLENE AT A TEMPERATURE OF FROM ABOUT 250*C. TO 400*C. AND AT A PRESSURE OF FROM ABOUT 0.4 TO ABOUT 4 ATMOSPHERES OVER GAMMA-ALUMINUM FLUORIDE CATALYST, SAID CATALYST OBTAINED BY DEHYDRATING B-ALUMINUM FLUORIDE TRIHYDRATE AT FROM ABOUT 150*C. TO ABOUT 450*C. UNTIL WATER CEASES TO BE EVOLVED THEREFROM, SAID MIXTURE OF HYDROGEN FLUORIDE AND ACETYLENE HAVING A MOLAR RATIO OF FROM ABOUT 1 TO ABOUT 5 MOLES OF HYDROGEN FLUORIDE PER MOLE OF ACETYLENE, THE FEED RATE OF ACETYLENE IN SAID MIXTURE BEING FROM ABOUT 10 TO ABOUT 4,000 MILLILITERS, MEASURED AT STANDARD CONDITIONS, PER GRAM OF CATALYST PER HOUR, AND RECOVERING FROM SAID REACTION MIXTURE VINYL FLUROIDE AND 1,1-DIFLUOROETHANE.
Claim 2
Dependent Claim
128 words
A PROCESS FOR PREPARING VINYL FLUORIDE AND 1,1-DIFLUOROETHANE WHICH PROCESS COMPRISES PASSING A MIXTURE OF HYDROGEN FLUORIDE AND ACETYLENE AT A TEMPERATURE OF FROM ABOUT 250*C. TO 400*C. AND AT A PRESSURE OF FROM ABOUT 0.4 TO ABOUT 4 ATMOSPHERES OVER GAMMA-ALUMINUM FLUORIDE CATALYST, SAID CATALYST OBTAINED BY DEHYDRATING B-ALUMINUM FLUORIDE TRIHYDRATE AT FROM ABOUT 150*C. TO ABOUT 450*C. UNTIL WATER CEASES TO BE EVOLVED THEREFROM, SAID MIXTURE OF HYDROGEN FLUORIDE AND ACETYLENE HAVING A MOLAR RATIO OF FROM ABOUT 1 TO ABOUT 5 MOLES OF HYDROGEN FLUORIDE PER MOLE OF ACETYLENE, THE FEED RATE OF ACETYLENE IN SAID MIXTURE BEING FROM ABOUT 10 TO ABOUT 4,000 MILLILITERS, MEASURED AT STANDARD CONDITIONS, PER GRAM OF CATALYST PER HOUR, AND RECOVERING FROM SAID REACTION MIXTURE VINYL FLUROIDE AND 1,1-DIFLUOROETHANE.
References Cited (Backward Citations)
US2471525A
Cited
US2755313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |