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Patent US2528893A successfully refreshed from Google Patents.
US2528893A
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Ethylbenzene conversion
Assignee: Standard Oil Co
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Filing: 1948-08-25
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Granted: 1950-11-07
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Expires: 1968-08-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:09
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE DISPROPORTIONATION OF ETHYLBENZENE TO PRODUCE META-DIETHYLBENZENE IN A QUANTITY IN SUBSTANTIAL EXCESS OF THE THERMODYNAMIC EQUILIBRIUM QUANTITY, WHICH PROCESS COMPRISES CONTACTING ETHYLBENZENE IN THE ABSENCE OF OTHER REACTIVE HYDROCARBONS WIHT AT LEAST ABOUT 10 VOLUME PERCENT OF LIQUID HYDROGEN FLUORIDE AND WITH AT LEAST ABOUT 0.3 MOL OF BF3 PER MOL OF ETHYLBENZENE AT A TEMPERATURE BETWEEN ABOUT 0*F. AND ABOUT 175*F. UNDER A PRESSURE SUFFICIENT AT LEAST TO MAINTAIN A LIQUID PHASE AND SEPARATING BENZENE AND META-DIETHYLBENZENE FROM THE REACTION PRODUCTS.
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE DISPROPORTIONATION OF ETHYLBENZENE TO PRODUCE META-DIETHYLBENZENE IN A QUANTITY IN SUBSTANTIAL EXCESS OF THE THERMODYNAMIC EQUILIBRIUM QUANTITY, WHICH PROCESS COMPRISES CONTACTING ETHYLBENZENE IN THE ABSENCE OF OTHER REACTIVE HYDROCARBONS WIHT AT LEAST ABOUT 10 VOLUME PERCENT OF LIQUID HYDROGEN FLUORIDE AND WITH AT LEAST ABOUT 0.3 MOL OF BF3 PER MOL OF ETHYLBENZENE AT A TEMPERATURE BETWEEN ABOUT 0*F. AND ABOUT 175*F. UNDER A PRESSURE SUFFICIENT AT LEAST TO MAINTAIN A LIQUID PHASE AND SEPARATING BENZENE AND META-DIETHYLBENZENE FROM THE REACTION PRODUCTS.
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |