US2940987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of degraded anthraquinone working solutions used for producing hydrogen peroxide
Assignee: EIDP Inc
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Filing: 1957-05-24
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Granted: 1960-06-14
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Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl W Eller
- 👤 James M Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:55
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF REGENERATING A WORKING SOLUTION OF AN ANTHRAQUINONE IN A WATER-IMMISCIBLE SOLVENT, SAID SOLUTION HAVING BECOME DEGRADED THROUGH USE IN CYCLIC REDUCTION AND OXIDATION OPERATIONS FOR THE PRODUCTION OF HYDROGEN PERIOXIDE, SAID METHOD COMPRISING CONTINUOUSLY PASSING A GAS CONTAINING FREE OXYGEN THROUGH THE DEGRADED SOLUTION WHILE SAID DEGRADED SOLUTION IS HEATED TO A TEMPERATURE OF FROM 95 TO 300*C., SAID GAS HAVING A FREE OXYGEN CONTENT OF 1 TO 100% AND BEING DEVOID OF ANY COMPONENT OTHER THAN SAID FREE OXYGEN WHICH IS REACTIVE UNDER THE CONDITIONS EMPLOYED.
Claim 2
Independent Claim
90 words
THE METHOD OF REGENERATING A WORKING SOLUTION OF AN ANTHRAQUINONE IN A WATER-IMMISCIBLE SOLVENT, SAID SOLUTION HAVING BECOME DEGRADED THROUGH USE IN CYCLIC REDUCTION AND OXIDATION OPERATIONS FOR THE PRODUCTION OF HYDROGEN PERIOXIDE, SAID METHOD COMPRISING CONTINUOUSLY PASSING A GAS CONTAINING FREE OXYGEN THROUGH THE DEGRADED SOLUTION WHILE SAID DEGRADED SOLUTION IS HEATED TO A TEMPERATURE OF FROM 95 TO 300*C., SAID GAS HAVING A FREE OXYGEN CONTENT OF 1 TO 100% AND BEING DEVOID OF ANY COMPONENT OTHER THAN SAID FREE OXYGEN WHICH IS REACTIVE UNDER THE CONDITIONS EMPLOYED.
References Cited (Backward Citations)
US2739875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |