US2545870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic oxidation of alkyl benzenes to produce aryl alkyl ketones and carbinols
Assignee: Celanese Corp
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Filing: 1947-07-09
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Granted: 1951-03-20
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Expires: 1967-07-09
Abstract
No abstract record available.
Inventors
- 👤 Baker George Aubrey
- 👤 Hunter William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:19
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/48; C07C29/50; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/36; C07C67/00; C07C67/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
PROCESS FOR THE MANUFACTURE OF NON-ACIDIC MIXED-AROMATIC - ALIPHATIC OXYGEN - CONTAINING COMPOUNDS, WHICH COMPRISES HEATING IN THE LIQUID PHASE TO ABOVE 100* C. AN ALKYL BENZENE CONTAINING AT LEAST ONE ALKYL GROUP OF MORE THAN ONE CARBON ATOM IN WHICH THE CARBON ATOM NEXT TO THE BENZENE NUCLEUS IS ATTACHED TO HYDROGEN AND AT LEAST AN EQUIMOLECULAR AMOUNT OF ACETIC ANHYDRIDE IN THE PRESENCE OF AN OXIDATION CATAYST SELECTED FROM THE GROUP WHICH CONSISTS OF THE ORGANIC CARBOXYLIC ACID SALTS OF MANGANESE AND COBALT WITH OXYGEN UNDER A PARTIAL PRESSURE ABOVE 50 LB. PER SQ. IN., AND STOPPING THE REACTION WHILE AT LEAST HALF OF THE ALKYL BENZENE REMAINS UNOXIDISED.
Claim 2
Dependent Claim
111 words
PROCESS FOR THE MANUFACTURE OF NON-ACIDIC MIXED-AROMATIC - ALIPHATIC OXYGEN - CONTAINING COMPOUNDS, WHICH COMPRISES HEATING IN THE LIQUID PHASE TO ABOVE 100* C. AN ALKYL BENZENE CONTAINING AT LEAST ONE ALKYL GROUP OF MORE THAN ONE CARBON ATOM IN WHICH THE CARBON ATOM NEXT TO THE BENZENE NUCLEUS IS ATTACHED TO HYDROGEN AND AT LEAST AN EQUIMOLECULAR AMOUNT OF ACETIC ANHYDRIDE IN THE PRESENCE OF AN OXIDATION CATAYST SELECTED FROM THE GROUP WHICH CONSISTS OF THE ORGANIC CARBOXYLIC ACID SALTS OF MANGANESE AND COBALT WITH OXYGEN UNDER A PARTIAL PRESSURE ABOVE 50 LB. PER SQ. IN., AND STOPPING THE REACTION WHILE AT LEAST HALF OF THE ALKYL BENZENE REMAINS UNOXIDISED.
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) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |