US3133974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol alkylation process
Assignee: Ethyl Corp
•
Filing: 1960-11-23
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Granted: 1964-05-19
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Expires: 1980-11-23
Abstract
No abstract record available.
Inventors
- 👤 Robert P Curry
- 👤 Jr James C Geddes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR THE CONJOINT PREPARATION OF ORTHO-TERTBUTYL PHENOL, 2,4-DI-TERT-BUTYL PHENOL AND 2,6-DI-TERT-BUTYL PHENOL CHARACTERIZED BY SUBJECTING A REACTION MIXTURE COMPOSED OF PHENOL, ISBUTYLENE, AN ALUMINUM PHENOXIDE CATALYST AND A HALOGEN COMPOUND, AS HEREINAFTER DEFINED, TO A TEMPERATURE OF FROM ABOUT 120 TO ABOUT 160*C., AND TO A PRESSURE OF FROM ABOUT 100 TO ABOUT 900 P.S.I.G. FOR A PERIOD OF TIME RANGING FROM THAT (A) TIME AT WHICH EACH OF ORTHO-TERT-BUTYL PHENOL, 2,4-DITERT-BUTYL PHENOL, AND 2,6-DITERT-BUTYL PHENOL BECOMES PRESENT IN THE REACTION MIXTURE A CONCENTRATION OF AT LEAST ABOUT 10 MOLE PERCENT BASED ON THE TOTAL PHENOLIC COMPOUNDS PRESENT IN SAID MIXTURE, TO THAT (B) TIME AT WHICH THE MOLE PERCENTAGE RATIO OF
Claim 2
Dependent Claim
114 words
A PROCESS FOR THE CONJOINT PREPARATION OF ORTHO-TERTBUTYL PHENOL, 2,4-DI-TERT-BUTYL PHENOL AND 2,6-DI-TERT-BUTYL PHENOL CHARACTERIZED BY SUBJECTING A REACTION MIXTURE COMPOSED OF PHENOL, ISBUTYLENE, AN ALUMINUM PHENOXIDE CATALYST AND A HALOGEN COMPOUND, AS HEREINAFTER DEFINED, TO A TEMPERATURE OF FROM ABOUT 120 TO ABOUT 160*C., AND TO A PRESSURE OF FROM ABOUT 100 TO ABOUT 900 P.S.I.G. FOR A PERIOD OF TIME RANGING FROM THAT (A) TIME AT WHICH EACH OF ORTHO-TERT-BUTYL PHENOL, 2,4-DITERT-BUTYL PHENOL, AND 2,6-DITERT-BUTYL PHENOL BECOMES PRESENT IN THE REACTION MIXTURE A CONCENTRATION OF AT LEAST ABOUT 10 MOLE PERCENT BASED ON THE TOTAL PHENOLIC COMPOUNDS PRESENT IN SAID MIXTURE, TO THAT (B) TIME AT WHICH THE MOLE PERCENTAGE RATIO OF
References Cited (Backward Citations)
US2931898A
Cited
DE1044825B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |