US2567848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of phenolic compounds with olefins
Assignee: Shell Development Co
•
Filing: 1948-07-30
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Granted: 1951-09-11
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Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 Eduard C Kooyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:34
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE PRODUCTION OF DIALKYL PHENOLS WHICH COMPRISES SUSPENDING ZINC OXIDE IN PHENOL, HEATING THE SUSPENSION TO A REACTION TEMPERATURE BETWEEN 60* C. AND 180* C., GRADUALLY ADDING TO THE SUSPENSION FRY HYDROCHLORIC ACID GAS AND CRACKED WAX OLEFINS HAVING FROM 14 TO 18 CARBON ATOMS PER MOLECULE, THE AMOUNT OF SAID ZINC OXIDE BEING BETWEEN 0.2% AND 2% BY WEIGHT OF SAID PHENOL AND OLEFIN, AND THE AMOUNT OF OLEFIN BEING IN MOLECULAR EXCESS WITH RESPECT TO THE PHENOL, WHEREBY DIALKYL PHENOL IS PRODUCED TO THE SUBSTANTIAL EXCLUSION OF TRIALKYL PHENOL.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PRODUCTION OF DIALKYL PHENOLS WHICH COMPRISES SUSPENDING ZINC OXIDE IN PHENOL, HEATING THE SUSPENSION TO A REACTION TEMPERATURE BETWEEN 60* C. AND 180* C., GRADUALLY ADDING TO THE SUSPENSION FRY HYDROCHLORIC ACID GAS AND CRACKED WAX OLEFINS HAVING FROM 14 TO 18 CARBON ATOMS PER MOLECULE, THE AMOUNT OF SAID ZINC OXIDE BEING BETWEEN 0.2% AND 2% BY WEIGHT OF SAID PHENOL AND OLEFIN, AND THE AMOUNT OF OLEFIN BEING IN MOLECULAR EXCESS WITH RESPECT TO THE PHENOL, WHEREBY DIALKYL PHENOL IS PRODUCED TO THE SUBSTANTIAL EXCLUSION OF TRIALKYL PHENOL.
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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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |