US2925391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the reactivation of a supported palladium hydrogenation catalyst
Assignee: Evonik LCL Ltd
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Filing: 1955-11-10
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Granted: 1960-02-16
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Expires: 1975-11-10
Abstract
No abstract record available.
Inventors
- 👤 Lait Raymond
- 👤 Lewis Gerald Frederick
- 👤 Hack Kenneth Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A PROCESS FOR THE REACTIVATION OF A SUPPORTED PALLADIUM HYDROGENATION CATALYST USED IN THE MANUFACTURE OF HYDROGEN PEROXIDE BY THE ALTERNATE HYDROGENATION AND AUTOXIDATION OF AN ORGANIC COMPOUND DISSOLVED IN AT LEAST ON SOLVENT WITH REMOVAL OF THE FORMED HYDROGEN PEROXIDE AND RECYCLING OF THE AUTOXIDIZED COMPOUND, THE IMPROVEMENT COMPRISING SEPARATING SAID CATALYST FROM SAID ORGANIC COMPOUND AND SAID SOLVENT BY WASHING SAID CATALYST WITH BENZENE, DRYING SAID CATALYST, AND THEREAFTER INTIMATELY CONTACTING SAID CATALYST WITH A NON-OXIDIZING AQUEOUS ALKALINE SOLUTION AT A PH GREATER THAN 12.
Claim 2
Dependent Claim
88 words
IN A PROCESS FOR THE REACTIVATION OF A SUPPORTED PALLADIUM HYDROGENATION CATALYST USED IN THE MANUFACTURE OF HYDROGEN PEROXIDE BY THE ALTERNATE HYDROGENATION AND AUTOXIDATION OF AN ORGANIC COMPOUND DISSOLVED IN AT LEAST ON SOLVENT WITH REMOVAL OF THE FORMED HYDROGEN PEROXIDE AND RECYCLING OF THE AUTOXIDIZED COMPOUND, THE IMPROVEMENT COMPRISING SEPARATING SAID CATALYST FROM SAID ORGANIC COMPOUND AND SAID SOLVENT BY WASHING SAID CATALYST WITH BENZENE, DRYING SAID CATALYST, AND THEREAFTER INTIMATELY CONTACTING SAID CATALYST WITH A NON-OXIDIZING AQUEOUS ALKALINE SOLUTION AT A PH GREATER THAN 12.
References Cited (Backward Citations)
US2787540A
Cited
US2692240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |