Patent US5852502A successfully refreshed from Google Patents.
Patent US3960704A successfully refreshed from Google Patents.
US3960704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of isotropic delayed petroleum coke
Assignee: ConocoPhillips Co
•
Filing: 1974-08-27
•
Granted: 1976-06-01
•
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 19:16
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.
References Cited (Backward Citations)
US2347805A
Cited
US2661323A
Cited
US2905615A
Cited
US3112181A
Cited
US3116231A
Cited
US3673080A
Cited
US3702816A
Cited
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 |