US2958715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary amylene recovery using sulfuric acid and hydrocarbon extractants
Assignee: Sinclair Refining Co
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Filing: 1960-04-07
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Granted: 1960-11-01
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Expires: 1980-04-07
Abstract
No abstract record available.
Inventors
- 👤 Robert A Sanford
- 👤 Seymour H Patinkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:34
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
IN A METHOD FOR RECOVERING ISOAMYLENES SELECTED FROM THE GROUP CONSISTING OF 22-METHYLBUTENE-1 AND 2METHYLBUTENE-2, THE STEPS COMPRISING CONTACTING A TERTIARY ISOAMYLENE-CONTAINING HYDROCARBON STREAM WHICH INCLUDES OTHER C5 HYDROCARBONS WITH SULFURIC ACID OF ABOUT 50 TO 75% BY WEIGHT CONCENTRATION TO PREPARE A FAT ACID EXTRACT, CONTACTING SAID FAT ACID EXTRACT WITH A LIQUID HYDROCARBON HAVING A BOILING POINT SUFFICIENTLY ABOVE THAT OF THE ISOAMYLENE SO THAT THE ISOAMYLENE CAN BE REMOVED THEREFROM BY DISTILLATION, SAID CONTACT TAKING PLACE AT A TEMPERATURE OF ABOUT 0 TO 60*C. WHILE AVOIDING UNDUE POLYMERIZATION TO PRODUCE AN ACID PHASE AND AN ISOAMYLENE-CONTAINING HYDROCARBON PHASE, SEPARATING SAID ACID PHASE FROM SAID HYDROCRBON PHASE, AND RECOVERING THE ISOAMYLENE FROM SAID HYDROCARBON PHASE BY DISTILLATION.
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |