US3748261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage desulfurization with solvent deasphalting between stages
Assignee: Honeywell UOP LLC
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Filing: 1971-12-14
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Granted: 1973-07-24
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Expires: 1991-12-14
Abstract
Abstract AN ASPHALTIC, HYDROCARBONACEOUS CHARGE STOCK, CONTAINING MORE THAN ABOUT 2.0% BY WEIGHT OF SULFUR, IS CONVERTED TO FUEL OIL IN A PLURALITY OF CATALYTIC CONVERSION ZONES. THE FIRST ZONE EFFLUENT IS SEPARATED TO PROVIDE AN ASPHALTENE CONCENTRATE WHICH IS SUBJECTED TO SOLVENT DEASPHALTING. THE REMAINDER OF THE FIRST ZONE EFFLUENT, IN ADMIXTURE WITH THE DEAPHALTED PRODUCT, IS FURTHER REACTED IN A SECOND CATALYTIC REACTION ZONE. THE FUEL OIL PRODUCT, IN ADMIXTURE WITH THE PRECIPITATED ASPHALTICS, HAS A SULFUR CONCENTRATION LESS THAN ABOUT 1.0% BY WEIGHT.
Inventors
- 👤 C Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:03
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/0463; C10G65/00; C10G65/02; C10G65/04
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |