US2822393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of cyclohexanone oxime
Assignee: Olin Corp
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Filing: 1954-08-05
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Granted: 1958-02-04
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Expires: 1974-08-05
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Nicolaisen
- 👤 Samuel A Riccardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:58
CPC Classifications
C; C07; C07C; C07C201/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD FOR EXTRACTING CYCLOHEXANONE OXIME FROM SOLUTION IN A FIRST WATER IMMISCIBLE ORGANIC HYDROCARBON SOLVENT, SAID SOLUTION CONTAINING CONTAMINANTS, WHICH COMPRISES CONTACTING THE SAID SOLUTION WITH A DILUTE, AQUEOUS STRONG MINERAL ACID TO FORM A WATER SOLUBLE SALT OF THE OXIME, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING THE WATER SOLUBLE SALT AND NEUTRALIZING THE SEPARATED AQUEOUS PHASE BY THE ADDITION OF AMMONIA TO A PH OF ABOUT 4.5 TO 7.5 IN THE PRESENCE OF A SECOND WATER IMMISCIBLE ORGANIC HYDROCARBON SOLVENT WHILE EFFECTING SOLUTION OF THE OXIME IN THE SAID SECOND SOLVENT, SAID SOLUTION OF OXIME IN THE SECOND SOLVENT BEING SUBSTANTIALLY FREE OF SAID CONTAMINANTS.
Claim 2
Independent Claim
107 words
A METHOD FOR EXTRACTING CYCLOHEXANONE OXIME FROM SOLUTION IN A FIRST WATER IMMISCIBLE ORGANIC HYDROCARBON SOLVENT, SAID SOLUTION CONTAINING CONTAMINANTS, WHICH COMPRISES CONTACTING THE SAID SOLUTION WITH A DILUTE, AQUEOUS STRONG MINERAL ACID TO FORM A WATER SOLUBLE SALT OF THE OXIME, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING THE WATER SOLUBLE SALT AND NEUTRALIZING THE SEPARATED AQUEOUS PHASE BY THE ADDITION OF AMMONIA TO A PH OF ABOUT 4.5 TO 7.5 IN THE PRESENCE OF A SECOND WATER IMMISCIBLE ORGANIC HYDROCARBON SOLVENT WHILE EFFECTING SOLUTION OF THE OXIME IN THE SAID SECOND SOLVENT, SAID SOLUTION OF OXIME IN THE SECOND SOLVENT BEING SUBSTANTIALLY FREE OF SAID CONTAMINANTS.
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |