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US3696027A
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US
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Multi-stage desulfurization
Assignee: Chevron USA Inc
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Filing: 1970-01-12
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Granted: 1972-10-03
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Expires: 1990-01-12
Abstract
Abstract A PROCESS FOR HYDRODESULFURIZATION OF A METALS-CONTAMINATED HEAVY OIL BY THE FOLLOWING STEPS CARRIED OUT UNDER HYDROCONVERTING CONDITIONS: (A) PASSING THE HEAVY OIL THROUGH A FIXED BED OF MACROPOROUS CATALYST PARTICLES HAVING HIGH METALS CAPACITY AND LOW DEUSLFURIZATION ACTIVITY, (B) PASSING EFFLUENT FROM THE MACROPOROUS CATALYST BED THROUGH A FIXED BED OF MODERATELY ACTIVE DESULFURIZATION CATALYST PARTICLES, AND (C) PASSING EFFLUENT FROM THE BED OF MODERATELY ACTIVE DESULFURIZATION CATALYST PARTICLES THROUGH A FIXED BED OF HIGHLY ACTIVE DESULFURIZATION CATALYST PARTICLES.
Inventors
- 👤 Alan G Bridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:48
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |