Patent US2908729A successfully refreshed from Google Patents.
US2908729A
Expired / Lapsed
US
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Process for the preparation of 1, 3, 5-tri-t-butylbenzene by alkylation
Assignee: Standard Oil Co
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Filing: 1956-09-07
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Granted: 1959-10-13
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Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:15
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR PREPARING 1,3,5-TRI-T-BUTYLBENZENE WHICH COMPRISES CONTACTING, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, BENZENE AND ISOBUTENE IN A MOL RATIO OF BENZENE TO ISOBUTENE OF ABOUT 3, IN THE PRESENCE OF LIQUID HF CATALYST, IN AN AMOUNT BETWEEN ABOUT 50 AND 500 VOLUME PERCENT, BASED ON SAID BENZENE REACTANT, AT A TEMPERATURE BETWEEN ABOUT -20*C. AND +40*C. FOR A TIME BETWEEN ABOUT 15 MINUTES AND 8 HOURS, THE LONGER TIMES CORRESPONDING TO THE LOWER TEMPERATURES, RECOVERING FROM THE HYDROCARBON PRODUCT MIXTURE 1,3,5-TRI-TBUTYLBENZENE AS ESSENTIALLY THE ONLY TRI-T-BUTYLBENZENE PRODUCT, SAID ISOBUTENE BEING ADDED TO THE CONTACTING ZONE SUBSTANTIALLY UNIFORMLY OVER THE CONTACTING TIME.
Claim 2
Dependent Claim
101 words
A PROCESS FOR PREPARING 1,3,5-TRI-T-BUTYLBENZENE WHICH COMPRISES CONTACTING, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, BENZENE AND ISOBUTENE IN A MOL RATIO OF BENZENE TO ISOBUTENE OF ABOUT 3, IN THE PRESENCE OF LIQUID HF CATALYST, IN AN AMOUNT BETWEEN ABOUT 50 AND 500 VOLUME PERCENT, BASED ON SAID BENZENE REACTANT, AT A TEMPERATURE BETWEEN ABOUT -20*C. AND +40*C. FOR A TIME BETWEEN ABOUT 15 MINUTES AND 8 HOURS, THE LONGER TIMES CORRESPONDING TO THE LOWER TEMPERATURES, RECOVERING FROM THE HYDROCARBON PRODUCT MIXTURE 1,3,5-TRI-TBUTYLBENZENE AS ESSENTIALLY THE ONLY TRI-T-BUTYLBENZENE PRODUCT, SAID ISOBUTENE BEING ADDED TO THE CONTACTING ZONE SUBSTANTIALLY UNIFORMLY OVER THE CONTACTING TIME.
References Cited (Backward Citations)
US2768985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |