US2825742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid phase oxidation of cyclohexane
Assignee: EIDP Inc
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Filing: 1954-05-04
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Granted: 1958-03-04
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Expires: 1974-05-04
Abstract
No abstract record available.
Inventors
- 👤 Arnold P Schueler
- 👤 Frederick A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:52
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/313; C07C45/00; C07C45/27; C07C45/32; C07C45/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR MANUFACTURING PARTIAL OXIDATION PRODUCTS OF CYCLOHEXANE, INCLUDING CYCLOHEXANOL AND CYCLOHEXANONE, WHICH COMPRISES REACTING CYCLOHEXANE IN THE LIQUID PHASE WITH GASEOUS OXYGEN AT A TEMPERATURE OF 75* TO 200*C. UNDER A PRESSURE OF 50 TO 500 POUNDS PER SQUARE INCH IN THE PRESENCE OF A HYDROCARBON-SOLUBLE COMPOUND OF COBALT AS OXIDATION CATALYST, AT LEAST PART OF THE OXIDATION MIXTURE BEING EXTRACTED WITH WATER PRIOR TO COMPLETING THE SAID PARTIAL OXIDATION, CONTINUING THE OXIDATION WHILE SEPARATING WATER FROM THE OXIDATION MIXTURE SUBSTANTIALLY AS RAPIDLY AS THE SAID WATER IS FORMED BY THE OXIDATION REACTION, UNTIL THE OVERALL PERCENTAGE OF CYCLOHEXANE WHICH HAS BECOME OXIDIZED IS FROM 5% TO 20%, ADMIXING WATER WITH THE RESULTING OXIDATION MIXTURE AND SEPARATING CYCLOHEXANE, THEREFROM WHEREBY OXIDATION PRODUCTS OF CYCLOHEXANE, CAPABLE OF FURTHER OXIDATION TO ADIPIC ACID, ARE OBTAINED.
Claim 2
Dependent Claim
135 words
A PROCESS FOR MANUFACTURING PARTIAL OXIDATION PRODUCTS OF CYCLOHEXANE, INCLUDING CYCLOHEXANOL AND CYCLOHEXANONE, WHICH COMPRISES REACTING CYCLOHEXANE IN THE LIQUID PHASE WITH GASEOUS OXYGEN AT A TEMPERATURE OF 75* TO 200*C. UNDER A PRESSURE OF 50 TO 500 POUNDS PER SQUARE INCH IN THE PRESENCE OF A HYDROCARBON-SOLUBLE COMPOUND OF COBALT AS OXIDATION CATALYST, AT LEAST PART OF THE OXIDATION MIXTURE BEING EXTRACTED WITH WATER PRIOR TO COMPLETING THE SAID PARTIAL OXIDATION, CONTINUING THE OXIDATION WHILE SEPARATING WATER FROM THE OXIDATION MIXTURE SUBSTANTIALLY AS RAPIDLY AS THE SAID WATER IS FORMED BY THE OXIDATION REACTION, UNTIL THE OVERALL PERCENTAGE OF CYCLOHEXANE WHICH HAS BECOME OXIDIZED IS FROM 5% TO 20%, ADMIXING WATER WITH THE RESULTING OXIDATION MIXTURE AND SEPARATING CYCLOHEXANE, THEREFROM WHEREBY OXIDATION PRODUCTS OF CYCLOHEXANE, CAPABLE OF FURTHER OXIDATION TO ADIPIC ACID, ARE OBTAINED.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |