Patent US3966803A successfully refreshed from Google Patents.
Patent US3751517A successfully refreshed from Google Patents.
US3751517A
Expired / Lapsed
US
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Recovery of alkyl fluoride in alkylation of isoparaffin with ethylene and a higher olefin promoter
Assignee: Phillips Petroleum Co
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Filing: 1971-03-03
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Granted: 1973-08-07
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Expires: 1991-03-03
Abstract
Abstract IN THE ALKYLATION OF AN ISOPARAFFIN WITH AN OLEFIN IN THE PRESENCE OF HYDROFLUORIC ACID AS CATALYST WHEREIN THE TOTAL OLEFIN FEED AND/OR ISOPARAFFIN STREAM INCLUDES OR IS CONVERTED IN PART TO PROPANE CONTAINING STREAM, SAID OPERATION IS FOUND IN A PROPANE CONTAINING STREAM, SAID STREAM IS CONTACTED WITH LIQUID HYDROGEN FLUORIDE TO EXTRACT THE ALKYL FLUORIDE FROM THE PROPANE AND THE THUS ENRICHED HYDROGEN FLUORIDE IS CHARGED TO THE ALKYLATION, THE PROPANE BEING RECOVERED FROM THE USUAL HYDROGEN FLUORIDE STRIPPER.
Inventors
- 👤 T Hutson
- 👤 C Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:49
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |