Patent US2739875A successfully refreshed from Google Patents.
US2739875A
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Regeneration of degraded alkylanthraquinone solutions for the production of hydrogen peroxide
Assignee: EIDP Inc
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Filing: 1951-12-06
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Granted: 1956-03-27
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Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Jerome W Sprauer
- 👤 Thurman V Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:03
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF REGENERATING A DEGRADED SOLUTION COMPRISING AN ALKYLANTHRAQUINONE DISSOLVED IN A SOLVENT THEREFOR, WHICH SOLUTION HAS BECOME DEGRADED THROUGH USE IN A PROCESS FOR SYNTHESIZING HYDROGEN PEROXIDE INVOLVING ALTERNATELY HYDROGENATING SAID ALKYLANTHRAQUINONE AND OXYGENATING THE RESULTING ALKYLANTHRAQUINONE WHICH IS RECYCLED AFTER SEPARATION OF THE HYDROGEN PEROXIDE SIMULTANEOUSLY FORMED, SAID METHOD COMPRISING HEATING SAID DEGRADED SOLUTION AT A TEMPERATURE OF AT LEAST 55* C. IN THE PRESENCE OF AN AGENT FROM THE GROUP CONSISTING OF ACTIVATED ALUMINA AND ACTIVE MAGNESIA.
Claim 2
Independent Claim
81 words
A METHOD OF REGENERATING A DEGRADED SOLUTION COMPRISING AN ALKYLANTHRAQUINONE DISSOLVED IN A SOLVENT THEREFOR, WHICH SOLUTION HAS BECOME DEGRADED THROUGH USE IN A PROCESS FOR SYNTHESIZING HYDROGEN PEROXIDE INVOLVING ALTERNATELY HYDROGENATING SAID ALKYLANTHRAQUINONE AND OXYGENATING THE RESULTING ALKYLANTHRAQUINONE WHICH IS RECYCLED AFTER SEPARATION OF THE HYDROGEN PEROXIDE SIMULTANEOUSLY FORMED, SAID METHOD COMPRISING HEATING SAID DEGRADED SOLUTION AT A TEMPERATURE OF AT LEAST 55* C. IN THE PRESENCE OF AN AGENT FROM THE GROUP CONSISTING OF ACTIVATED ALUMINA AND ACTIVE MAGNESIA.
References Cited (Backward Citations)
US2059569A
Cited
US2537655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |