US2655546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of tertiary alkyl aryl ethers
Assignee: Gulf Research and Development Co
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Filing: 1951-04-26
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Granted: 1953-10-13
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Expires: 1971-04-26
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 Robert S Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:11
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR PREPARING A TERTIARY ALKYL ARYL ETHER WHICH COMPRISES REACTING AN ISOOLEFIN AND A PHENOL AT A TEMPERTURE NOT EXCEEDING ABOUT 65* C. AND IN THE PRESENCE OF A TRACE, NOT EXCEEDING ABOUT 0.28 MOL PER CENT BASED ON THE PHENOL, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, CHLOROSULFONIC ACID, BENZENE SULFONIC ACID, ALKALI METAL ACID SULFATES, ALKYL ACID SULFATES HAVING 1 TO 9 CARBON ATOMS AND DI-SECALKYL SULFATES HAVING 3 TO 6 CARBON ATOMS IN EACH ALKYL GROUP, THE AMOUNT OF SAID CATALYST BEING VARIED DEPENDING UPON THE TEMPERATURE EMPLOYED, SMALLER AMOUNTS OF THE CATALYST BEING USED AT HIGHER TEMPERATURES; AND STABILIZING THE RESULTING REACTION PRODUCT CONTAINING A TERTIARY ALKYL ARYL ETHER AGAINST SAID ETHER''S REARRANGING TO FORM THE CORRESPONDING ALKYL PHENOL.
Claim 2
Dependent Claim
129 words
A PROCESS FOR PREPARING A TERTIARY ALKYL ARYL ETHER WHICH COMPRISES REACTING AN ISOOLEFIN AND A PHENOL AT A TEMPERTURE NOT EXCEEDING ABOUT 65* C. AND IN THE PRESENCE OF A TRACE, NOT EXCEEDING ABOUT 0.28 MOL PER CENT BASED ON THE PHENOL, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, CHLOROSULFONIC ACID, BENZENE SULFONIC ACID, ALKALI METAL ACID SULFATES, ALKYL ACID SULFATES HAVING 1 TO 9 CARBON ATOMS AND DI-SECALKYL SULFATES HAVING 3 TO 6 CARBON ATOMS IN EACH ALKYL GROUP, THE AMOUNT OF SAID CATALYST BEING VARIED DEPENDING UPON THE TEMPERATURE EMPLOYED, SMALLER AMOUNTS OF THE CATALYST BEING USED AT HIGHER TEMPERATURES; AND STABILIZING THE RESULTING REACTION PRODUCT CONTAINING A TERTIARY ALKYL ARYL ETHER AGAINST SAID ETHER''S REARRANGING TO FORM THE CORRESPONDING ALKYL PHENOL.
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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |