Patent US2662926A successfully refreshed from Google Patents.
US2662926A
Expired / Lapsed
US
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Pentamethylbenzene disproportionation
Assignee: Standard Oil Co
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Filing: 1950-08-31
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Granted: 1953-12-15
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Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:56
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE PRODUCTION OF ISODURENE AND HEXAMETHYLBENZENE BY THE DISPROPORTIONATION OF PENTAMETHYLBENZENE, WHICH PROCESS COMPRISES TREATING A FEED CONTAINING PENTAMETHYLBENZENE AS SUBSTANTIALLY THE ONLY REACTIVE HYDROCARBON, WITH AT LEAST ABOUT 2 MOLS OF LIQUID HF PER MOL OF SAID PENTAMETHYLBENZENE AND AT LEAST ABOUT 1 MOLE OF BF3 PER MOL OF SAID PENTAMETHYLBENZENE, AT A TEMPERATURE BETWEEN ABOUT 20* AND 80* C., FOR A TIME SUFFICIENT TO PRODUCE AN APPRECIABLE AMOUNT OF ISODURENE AND HEXAMETHYLBENZENE; UNDER A PRESSURE SUFFICIENT OT MAINTAIN SAID HF IN THE LIQUID PHASE, SEPARATING A PRODUCT CONTAINING ISODURENE, PENTAMETHYLBENZENE AND HEXAMETHYLBENZENE AS SUBSTANTIALLY THE ONLY ALKYLBENZENES THEREIN BY REMOVING HF AND BF3; AND
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE PRODUCTION OF ISODURENE AND HEXAMETHYLBENZENE BY THE DISPROPORTIONATION OF PENTAMETHYLBENZENE, WHICH PROCESS COMPRISES TREATING A FEED CONTAINING PENTAMETHYLBENZENE AS SUBSTANTIALLY THE ONLY REACTIVE HYDROCARBON, WITH AT LEAST ABOUT 2 MOLS OF LIQUID HF PER MOL OF SAID PENTAMETHYLBENZENE AND AT LEAST ABOUT 1 MOLE OF BF3 PER MOL OF SAID PENTAMETHYLBENZENE, AT A TEMPERATURE BETWEEN ABOUT 20* AND 80* C., FOR A TIME SUFFICIENT TO PRODUCE AN APPRECIABLE AMOUNT OF ISODURENE AND HEXAMETHYLBENZENE; UNDER A PRESSURE SUFFICIENT OT MAINTAIN SAID HF IN THE LIQUID PHASE, SEPARATING A PRODUCT CONTAINING ISODURENE, PENTAMETHYLBENZENE AND HEXAMETHYLBENZENE AS SUBSTANTIALLY THE ONLY ALKYLBENZENES THEREIN BY REMOVING HF AND BF3; AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |