US2814651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetraalkylbenzene process
Assignee: Standard Oil Co
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Filing: 1955-07-26
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Granted: 1957-11-26
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Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR PREPARING TETRAMETHYLBENZENE COMPRISING CONTACTING, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, A FEED CONSISTING OF AT LEAST ONE TRIMETHYLBENZENE AND AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF DIETHYLBENZENE AND TRIETHYLBENZENE, IN A MOLE RATIO OF TRIMETHYLBENZENE TO SAID DEFINED POLYETHYLBENZENE OF BETWEEN ABOUT 20:1 AND 2:1 WITH LIQUID HF CATALYST IN AN AMOUNT BETWEEN ABOUT 25 AND 400 VOLUME PERCENT BASED ON HYDROCARBON FEED AT A TEMPERATURE BETWEEN ABOUT 80*C AND 190*C, FOR A TIME BETWEEN ABOUT 1 MINUTE AND 60 MINUTES, THE LONGER TIME CORRESPONDING TO THE LOWER TEMPERATURES AND LOWER HF USAGES, ROMOVING HF FROM A HYDROCARBON PRODUCT MIXTURE COMPRISING TETRAMETHYLBENZENE, ETHYLTRIMETHYLBENZENE AND UNCONVERTED FEED HYDROCARBONS.
Claim 2
Dependent Claim
110 words
A PROCESS FOR PREPARING TETRAMETHYLBENZENE COMPRISING CONTACTING, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, A FEED CONSISTING OF AT LEAST ONE TRIMETHYLBENZENE AND AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF DIETHYLBENZENE AND TRIETHYLBENZENE, IN A MOLE RATIO OF TRIMETHYLBENZENE TO SAID DEFINED POLYETHYLBENZENE OF BETWEEN ABOUT 20:1 AND 2:1 WITH LIQUID HF CATALYST IN AN AMOUNT BETWEEN ABOUT 25 AND 400 VOLUME PERCENT BASED ON HYDROCARBON FEED AT A TEMPERATURE BETWEEN ABOUT 80*C AND 190*C, FOR A TIME BETWEEN ABOUT 1 MINUTE AND 60 MINUTES, THE LONGER TIME CORRESPONDING TO THE LOWER TEMPERATURES AND LOWER HF USAGES, ROMOVING HF FROM A HYDROCARBON PRODUCT MIXTURE COMPRISING TETRAMETHYLBENZENE, ETHYLTRIMETHYLBENZENE AND UNCONVERTED FEED HYDROCARBONS.
References Cited (Backward Citations)
US2416184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |