Patent US3003096A successfully refreshed from Google Patents.
US3577353A
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Preparation of a cogelled catalyst of alumina and a group vi hydrogenating component
Assignee: Chevron USA Inc
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Filing: 1968-11-22
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Granted: 1971-05-04
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Expires: 1988-11-22
Abstract
Abstract A HYDROFINING CATALYST IS PREPARED BY COGELATION OF HYDROUS ALUMINA AND A GROUP VI METAL OR METAL COMPOUND, WASHING SAID GEL TO REMOVE OCCLUDED SALTS AND THEN CONTACTING THE WASHED GEL WITH AN ORGANIC SOLVENT BEFORE THE GEL IS DRIED AND CALCINED. THIS CONTACTING STEP, WHICH MAY BE CARRIED OUT WITH METHANOL OR ETHANOL, SERVES TO EXTRACT WATER FROM THE HYDROUS GEL AND THUS PROVIDES LESS SHRINKAGE OF THE GEL AFTER FINAL DRYING.
Inventors
- 👤 Robert J White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:37
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/06; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/883; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J35/00; B01J35/60; B01J35/61; B01J35/615; B01J35/63; B01J35/635; B01J35/64; B01J35/647; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |