US2661382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ethylxylenes
Assignee: Standard Oil Co
•
Filing: 1951-07-25
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Granted: 1953-12-01
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Expires: 1971-07-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:07
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR THE PREPARATION OF A MIXTURE OF ETHYLXYLENES, WHICH MIXTURE CONSISTS PREDOMINANTLY OF 1,3.5-ETHYLXYLENE, WHICH PROCESS COMPRISES FORMING A SINGLE PHASE LIQUID SYSTEM BY TREATING A FEED MIXTURE CONSISTING ESSENTIALLY OF A XYLENE AND ETHYLBENZENE, WHEREIN THE XYLENE/ETHYLBENZENE RATIO IN SAID FEED IS GREATER THAN 1, WITH LIQUID HF IN AN AMOUNT OF AT LEAST ABOUT 2 MOLS PER MOL OF XYLENE IN SAID FEED, AND WITH BF3 IN AN AMOUNT BETWEEN ABOUT 0.7 MOLS AND LESS THAN 1 MOLE PER MOL OF XYLENE IN SAID FEED, WHEREBY A BF3-HF-XYLENE COMPLEX AND FREE-XYLENE BOTH EXIST IN SAID SINGLE PHASE LIQUID SYSTEM; MAINTAINING SAID SINGLE PHASE LIQUID SYSTEM AT A TEMPERATURE OF LESS THAN ABOUT 160* F. FOR A TIME SUFFICIENT TO PRODUCE A HYDROCARBON
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE PREPARATION OF A MIXTURE OF ETHYLXYLENES, WHICH MIXTURE CONSISTS PREDOMINANTLY OF 1,3.5-ETHYLXYLENE, WHICH PROCESS COMPRISES FORMING A SINGLE PHASE LIQUID SYSTEM BY TREATING A FEED MIXTURE CONSISTING ESSENTIALLY OF A XYLENE AND ETHYLBENZENE, WHEREIN THE XYLENE/ETHYLBENZENE RATIO IN SAID FEED IS GREATER THAN 1, WITH LIQUID HF IN AN AMOUNT OF AT LEAST ABOUT 2 MOLS PER MOL OF XYLENE IN SAID FEED, AND WITH BF3 IN AN AMOUNT BETWEEN ABOUT 0.7 MOLS AND LESS THAN 1 MOLE PER MOL OF XYLENE IN SAID FEED, WHEREBY A BF3-HF-XYLENE COMPLEX AND FREE-XYLENE BOTH EXIST IN SAID SINGLE PHASE LIQUID SYSTEM; MAINTAINING SAID SINGLE PHASE LIQUID SYSTEM AT A TEMPERATURE OF LESS THAN ABOUT 160* F. FOR A TIME SUFFICIENT TO PRODUCE A HYDROCARBON
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |