US4082650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of petroleum coke with fines recycling
Assignee: ConocoPhillips Co
•
Filing: 1977-01-07
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Granted: 1978-04-04
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Expires: 1997-01-07
Abstract
Abstract Yield and coke quality of a delayed coking and coke calcining process is improved by addition of coke fines to a coke drum at a temperature approximately equal to or higher than that of the incoming liquid hydrocarbon residuum feedstock during the coking operation.
Inventors
- 👤 Ke Wen Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:46
CPC Classifications
C; C10; C10B; C10B55/00; C10B55/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
In a process for producing delayed petroleum coke comprising introducing a normally liquid hydrocarbon coker feedstock into a delayed coking drum under delayed coking conditions to produce delayed coke therein, the improvement wherein coke fines are added to said coking drum prior to introduction of said coker feedstock thereto, and said coke fines are preheated to approximately the temperature of said coker feedstock after being added to said coking drum but prior to introduction of said coker feedstock into said coking drum.
Claim 2
Dependent Claim
82 words
In a process for producing delayed petroleum coke comprising introducing a normally liquid hydrocarbon coker feedstock into a delayed coking drum under delayed coking conditions to produce delayed coke therein, the improvement wherein coke fines are added to said coking drum prior to introduction of said coker feedstock thereto, and said coke fines are preheated to approximately the temperature of said coker feedstock after being added to said coking drum but prior to introduction of said coker feedstock into said coking drum.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said coke fines are uncalcined coke fines.
Claim 4
Dependent Claim
14 words
the process of claim 1 wherein said coker feedstock is a premium coke feedstock.
Claim 5
Dependent Claim
48 words
The process of claim 1 wherein said coke fines are preheated to a temperature of at least 850° F, have a particle size of less then 30 mesh, are uncalcined and are added in an amount of from 4 to 8 weight percent based on the coke produced.
References Cited (Backward Citations)
US3116231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |