US2537337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of phenols
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1947-05-06
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Granted: 1951-01-09
•
Expires: 1967-05-06
Abstract
No abstract record available.
Inventors
- 👤 Fearey James Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:05
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE ALKYLATION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL AND CRESOLS IN WHICH THE SAID COMPOUND IS REACTED WITH AN ALIPHATIC MONO-OLEFIN IN THE PRESENCE OF A CATALYST WHICH IS THE REACTION PRODUCT OF A PORTION OF THE COMPOUND TO BE ALKYLATED AND CONCENTRATED SULFURIC ACID, THE COMPOUND TO BE ALKYLATED THE OLEFIN, AND THE SAID RECATION PRODUCT CATALYST BEING TREATED FOR THE REMOVAL OF WATER PRIOR TO THE ALKYLATION REACTION SO THAT LESS THAN 0.24 PARTS BY WEIGHT OF WATER ARE PRESENT PER PART BY WEIGHT OF EQUIVALENT SULFURIC ACID.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE ALKYLATION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL AND CRESOLS IN WHICH THE SAID COMPOUND IS REACTED WITH AN ALIPHATIC MONO-OLEFIN IN THE PRESENCE OF A CATALYST WHICH IS THE REACTION PRODUCT OF A PORTION OF THE COMPOUND TO BE ALKYLATED AND CONCENTRATED SULFURIC ACID, THE COMPOUND TO BE ALKYLATED THE OLEFIN, AND THE SAID RECATION PRODUCT CATALYST BEING TREATED FOR THE REMOVAL OF WATER PRIOR TO THE ALKYLATION REACTION SO THAT LESS THAN 0.24 PARTS BY WEIGHT OF WATER ARE PRESENT PER PART BY WEIGHT OF EQUIVALENT SULFURIC ACID.
References Cited (Backward Citations)
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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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |