US3817856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for contacting liquid and solid particles
Assignee: Shell USA Inc
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Filing: 1972-10-12
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Granted: 1974-06-18
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Expires: 1992-10-12
Abstract
Abstract AN APPARATUS AND A PROCESS WHEREIN A SOLID-LIQUID SLURRY IS CIRUCLATED IN A VERTICAL REACTOR BY MEANS OF GAS LIFT ACTION IN A CENTRALLY LOCATED TUBE INSIDE THE REACTOR. ONE OR MORE HYDROCYCLONES ARE USED TO CLARIFY LUQIID PRODUCT LEAVING THE REACTOR AND TO RETURN SLURRY SOLIDS TO THE REACTOR. THE PROCESS IS PARTICULARLY DESIRABLE FOR CATALYTICALLY DESULFURIZING RESIDUAL OILS IN THE PRESENCE OF HYDROGEN.
Inventors
- 👤 S Aaron
- 👤 J Lemmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:48
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/14; C10G45/16; B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01J8/22; B01J8/224; B01J8/226
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |