US2737528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of acetyl acetone
Assignee: Shawinigan Chemicals Ltd
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Filing: 1953-09-01
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Granted: 1956-03-06
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Expires: 1973-09-01
Abstract
No abstract record available.
Inventors
- 👤 Hunt Charles Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/04; C07C49/12; C07C49/14; C07C45/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE PRODUCTION OF ACETYL ACETONE COMPRISING (A) REACTING ACETYL CHLORIDE WITH ANHYDROUS ALUMINUM CHLORIDE IN THE PRESENCE OF AN INERT WATER-IMMISCIBLE LIQUID DILUENT WHICH IS SOLVENT FOR THE ACETYL CHLORIDE AND NON-SOLVENT FOR THE RESULTANT ORGANOMETALLIC COMPLEX, TO PRECIPITATE AN ORGANOMETALLIC COMPLEX, (B) DECOMPOSING THE ORGANOMETALLIC COMPLEX IN THE PRESENCE OF THE REMAINDER OF THE REACTION MIXTURE WITH AQUEOUS SULFURIC ACID TO FORM ACETYL ACETONE AND TO SEPARATE THE REACTION MIXTURE INTO AN AQUEOUS LAYER AND AN ORGANIC LAYER, AND (C) RECOVERING THE ACETYL ACETONE FROM THE ORGANIC LAYER.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE PRODUCTION OF ACETYL ACETONE COMPRISING (A) REACTING ACETYL CHLORIDE WITH ANHYDROUS ALUMINUM CHLORIDE IN THE PRESENCE OF AN INERT WATER-IMMISCIBLE LIQUID DILUENT WHICH IS SOLVENT FOR THE ACETYL CHLORIDE AND NON-SOLVENT FOR THE RESULTANT ORGANOMETALLIC COMPLEX, TO PRECIPITATE AN ORGANOMETALLIC COMPLEX, (B) DECOMPOSING THE ORGANOMETALLIC COMPLEX IN THE PRESENCE OF THE REMAINDER OF THE REACTION MIXTURE WITH AQUEOUS SULFURIC ACID TO FORM ACETYL ACETONE AND TO SEPARATE THE REACTION MIXTURE INTO AN AQUEOUS LAYER AND AN ORGANIC LAYER, AND (C) RECOVERING THE ACETYL ACETONE FROM THE ORGANIC LAYER.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |