Patent US2865708A successfully refreshed from Google Patents.
US2865708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering cobalt, cerium, and manganese catalysts
Assignee: Richfield Oil Corp
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Filing: 1955-08-26
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Granted: 1958-12-23
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Expires: 1975-08-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Dinsmore
- 👤 Warren V Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:34
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/04; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; B01J38/00; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/30; B01J2531/38; B01J2531/70; B01J2531/72; B01J2531/80; B01J2531/84; B01J2531/845; B01J27/00; B01J27/20; B01J27/232; B01J31/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR RECOVERING A CATALYTIC METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, CERIUM AND MANGANESE, IN A FORM ACTIVE FOR THE OXYGEN-CONTAINING GAS OXIDATION OF XYLENES, FROM A REACTION MIXTURE PRODUCED BY XOIDIZING XYLENE WITH AN OXYGEN-CONTAINING GAS WHILE OBTAINING AT LEAST A SUBSTANTIAL PORTION OF PHTHALIC ACID, SAID REACTION MIXTURE HAVING SUSPENDED THEREIN INSOLUBLE MATERIAL CONTAINING SPENT CATALYTIC METAL, WHICH COMPRISES THE STEPS OF SEPARATING SAID INSOLUBLE MATERIAL FROM SAID REACTION MIXTURE, TREATING FOR A PERIOD OF SEVERAL HOURS AT A TEMPERATURE IN EXCESS OF ABOUT 75*F. SAID INSOLUBLE MATERIAL WITH AN AQUEOUS SOLUTION OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF AN ALKALINE SALT AND A BASE OF AN ALKALI METAL, AND SEPARATING THE RESULTING PRECIPITATED ALKALINE SALT OF THE CATALYTIC METAL FROM SAID SOLUTION.
Claim 2
Dependent Claim
130 words
A PROCESS FOR RECOVERING A CATALYTIC METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, CERIUM AND MANGANESE, IN A FORM ACTIVE FOR THE OXYGEN-CONTAINING GAS OXIDATION OF XYLENES, FROM A REACTION MIXTURE PRODUCED BY XOIDIZING XYLENE WITH AN OXYGEN-CONTAINING GAS WHILE OBTAINING AT LEAST A SUBSTANTIAL PORTION OF PHTHALIC ACID, SAID REACTION MIXTURE HAVING SUSPENDED THEREIN INSOLUBLE MATERIAL CONTAINING SPENT CATALYTIC METAL, WHICH COMPRISES THE STEPS OF SEPARATING SAID INSOLUBLE MATERIAL FROM SAID REACTION MIXTURE, TREATING FOR A PERIOD OF SEVERAL HOURS AT A TEMPERATURE IN EXCESS OF ABOUT 75*F. SAID INSOLUBLE MATERIAL WITH AN AQUEOUS SOLUTION OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF AN ALKALINE SALT AND A BASE OF AN ALKALI METAL, AND SEPARATING THE RESULTING PRECIPITATED ALKALINE SALT OF THE CATALYTIC METAL FROM SAID SOLUTION.
References Cited (Backward Citations)
US2697723A
Cited
US2727921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |