Patent US4299188A successfully refreshed from Google Patents.
Patent US3767726A successfully refreshed from Google Patents.
US3767726A
Expired / Lapsed
US
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Extraction of alkyl fluoride from an alkylate hydrocarbon with a leanhf acid
Assignee: Phillips Petroleum Co
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Filing: 1971-11-11
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Granted: 1973-10-23
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Expires: 1991-11-11
Abstract
Abstract IN THE ALKYLATION OF AN ISOPARAFFIN WITH AN OLEFIN IN THE PRESENCE OF HYDROFLUORIC ACID AS CATALYST WHEREIN THE TOTAL FEED STREAM IS CONVERTED IN PART TO ALKYL FLUORIDE, THE ALKYLATION REACTION EFFLUENT STREAM CONTAINING ALKYL FLUORIDE IS CONTACTED WITH LIQUID HYDROGEN FLUORIDE WHICH HAS BEEN TREATED BY COUNTERCURRENT EXTRACTION WITH A STREAM COMPRISING ISOBUTANE, SAID TREATED HYDROGEN FLUORIDE IS USED TO EXTRACT THE ALKYL FLUORIDE FROM THE ALKYLATION REACTION EFFLUENT STREAM AND BOTH THE ALKYL FLUORIDE ENRICHED BUTANE STREAM AND THE ALKYL FLUORIDE ENRICHED HYDROGEN FLUORIDE STREAM ARE RECYCLED TO THE ALKYLATION REACTION ZONE.
Inventors
- 👤 T Hutson
- 👤 C Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:12
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |