US3598535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequential,fixed-bed hydrodesulfurization system
Assignee: Standard Oil Co
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Filing: 1968-08-15
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Granted: 1971-08-10
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Expires: 1988-08-15
Abstract
Abstract AN APPARTUS FOR THE HYDRODESULFURIZATION OF SULFURCONTAINING HYDROCARBONS WHERIN THE HYDROCARBON IS REACTED IN A FIRST STAGE WITH HYDROGEN IN THE PRESENCE OF A HYDROGEN TRANSFER CATALYST TO PRODUCE H2S, AND WHEREIN THE H2S SO PRODUCED IS REACTED WITH AN ALKALINE MATERIAL IN A SECOND STAGE TO PRODUCE A SOLID PHASE SULFIDE BEFORE IT CAN COMBINE WITH THE DESULFURIZED HYDROCARBONS. THE INVENTION IS PARTICULARLY USEFUL IN HYDRODESULFURIZING ASPHALTIC AND REDUCED CRUDES. A SERIES OF THE AFOREMENTIONED STAGES MAY BE LINKED TOGETHER TO FORM AN EFFICIENT HYDRODESULFURIZATION SYSTEM.
Inventors
- 👤 Arnald N Wennerberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:56
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |