US3763265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of ethylfluoride from isoparaffin ethylene and higher olefinalkylation by extractive distillation of propane containing stream obtained from alkylation effluent
Assignee: Phillips Petroleum Co
•
Filing: 1971-09-07
•
Granted: 1973-10-02
•
Expires: 1991-09-07
Abstract
Abstract IN THE ALKYLATION OF AN ISOPARRFFIN, E.G. ISOBUTANE AND/OR ISOPENTANE WITH ETHYLENE AND A HIGHER OLEFIN, E.G., PROPYLENE, BUTYLENES, AMYLENES, HEXENES, ETC., THE HYDROCARBON PHASE FROM THE ALKYLATION EFFLUENT IS FRACTIONATED AND VAPORS AND LIQUID IN THE FRACTIONATION ZONE CONTAINING PROPANE AND ETHYLFLUORIDE ARE SUBJECTED THEEIN TO EXTRACTIVE DISTILLATION WITH HYDROGEN FLUORIDE, THUS RECOVERING ETHYLFLUORIDE AND PASSING THUS RECOVERED ETHYLFLUORIDE CONTAINED IN THE HYDROGEN FLUORIDE TO ALKYLATION.
Inventors
- 👤 T Hutson
- 👤 C Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:36
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |