US3661799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidative fluidized regeneration of petroleum conversion catalyst in separate dilute and dense phase zones
Assignee: Standard Oil Co
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Filing: 1970-01-26
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Granted: 1972-05-09
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Expires: 1990-01-26
Abstract
Abstract CATALYTIC CONVERSION OF PETROLEUM FEEDSTOCKS, SUCH AS THE CRACKING OF A GAS OIL IN A VERTICAL TRANSPORT REACTOR, IS IMPROVED BY EFFECTING RAPID SEPARATION OF CATALYST FROM REACTOR EFFLUENT AND REGENERATING CATALYST IN A MULTI-STAGE FLUID-BED SYSTEM. A HIGHER YIELD OF DESIRABLE PETROLEUM PRODUCTS AND A LOWER CARBON LEVEL ON SPENT CATALYST ARE REALIZED. PARTIAL REGENERATION OF SPENT CATALYST IS EFFECTED IN A FIRST DILUTE-PHASE REGENERATION STAGE, PERMITTING SUBSEQUENT USE OF A HIGH REGENERATION TEMPERATURE IN ORDER TO REACH AN ACCEPTABLY LOW CARBON LEVEL ON REGENERATED CATALYST WITHOUT HARM TO SENSITIVE CONVERSION CATALYSTS.
Inventors
- 👤 Robert R Cartmell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:29
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J8/1845; B01J8/1863; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/182
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |