US3960704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of isotropic delayed petroleum coke
Assignee: ConocoPhillips Co
•
Filing: 1974-08-27
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Granted: 1976-06-01
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Expires: 1994-08-27
Abstract
Abstract Isotropic petroleum coke is produced by air blowing a petroleum residuum to produce a delayed coking feedstock having a particular softening point and then coking said air-blown residuum with or without diluent under delayed coking conditions.
Inventors
- 👤 William H. Kegler
- 👤 Marvin E. Huyser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:02
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/08; C10B55/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
A process for producing isotropic coke having a CTE ratio of less than 1.5 from reduced virgin crude oil comprising: a. air blowing said reduced virgin crude oil to a softening point of from 120° to 240°F; b. heating the air blown reduced virgin crude oil to a temperature of from 850° to 950°F; c. charging the heated reduced virgin crude oil to a delayed coking drum at a pressure of from 20 to 250 psig with a recycle ratio of from 1.0 to 5.0 to produce isotropic coke therein; and d. recovering isotropic coke having a CTE ratio of less than 1.5 from the coking drum.
Claim 2
Dependent Claim
107 words
A process for producing isotropic coke having a CTE ratio of less than 1.5 from reduced virgin crude oil comprising: a. air blowing said reduced virgin crude oil to a softening point of from 120° to 240°F; b. heating the air blown reduced virgin crude oil to a temperature of from 850° to 950°F; c. charging the heated reduced virgin crude oil to a delayed coking drum at a pressure of from 20 to 250 psig with a recycle ratio of from 1.0 to 5.0 to produce isotropic coke therein; and d. recovering isotropic coke having a CTE ratio of less than 1.5 from the coking drum.
Claim 3
Dependent Claim
62 words
The process of claim 1 wherein said reduced virgin crude oil is air blown at a temperature of from 500° to 600°F with from 30 to 60 SCF of air per ton of reduced virgin crude oil to a softening point of from 140° to 200°F, said pressure is from 20 to 80 psig, and said recycle ratio is at least 2.0.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |