Patent US1084556A successfully refreshed from Google Patents.
Patent US3773653A successfully refreshed from Google Patents.
US3773653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of coker feedstocks
Assignee: HRI Inc
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Filing: 1971-03-15
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Granted: 1973-11-20
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Expires: 1991-03-15
Abstract
Abstract Coker feedstocks having minimum amounts of sulfur or metals are produced from residuum feeds using an ebullated bed reaction zone. The qualities of the coker feedstocks are controlled through the use of selected operating conditions within the limits of converting 30 to 60 percent of the material in the feed boiling above 975* F to lighter boiling products.
Inventors
- 👤 G Nongbri
- 👤 S Alpert
- 👤 R Wolk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:24
CPC Classifications
C; C10; C10B; C10B55/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
The process of claim 1 wherein said liquid effluent removed in step b) is passed to a second reaction zone, wherein said second reaction zone is operated under conditions substantially the same as the first reaction zone, before completing step c).
Claim 2
Dependent Claim
61 words
The process of claim 2 wherein the reaction zones are operated at a temperature between 750* and 840* F and the catalyst is replaced at a rate between 0.02 and 0.4 pounds of catalyst per barrel of resid fed wherein said bottom fraction is coked to yield a coke having less than 200 ppm vanadium and less than 2.5 percent sulfur.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |