Patent US4160814A successfully refreshed from Google Patents.
US4160814A
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Thermal desulfurization and calcination of petroleum coke
Assignee: GREAT LAKES CARBON Corp
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Filing: 1978-03-01
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Granted: 1979-07-10
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Expires: 1998-03-01
Abstract
Abstract Low sulfur calcined coke is produced from high sulfur raw coke without substantially lowering its bulk density by heating the coke at a first temperature such that no more than about 70 wt.% of the volatile matter is removed therefrom and then heating the partially devolatilized coke at a higher temperature sufficient to effect calcination and desulfurization.
Inventors
- 👤 Edward E. Hardin
- 👤 Dean H. Guffey
- 👤 Lloyd I. Grindstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:02
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A process for calcining and thermally desulfurizing raw petroleum coke without substantially lowering the bulk density of said coke, said coke having a high sulfur content and having been produced by the delayed coking process, which comprises: (a) heating the coke at a first temperature in the range of about 490° to about 850° C. for a period of time in the range of about 30 to about 60 minutes such that no more than about 70 wt.% of the volatile matter content of said coke is removed therefrom; and (b) heating the partially devolatilized coke at a second temperature of at least about 1500° C. for a period of time in the range of about 30 to about 70 minutes to substantially completely calcine said coke and remove a major portion of the sulfur content therefrom.
Claim 2
Dependent Claim
137 words
A process for calcining and thermally desulfurizing raw petroleum coke without substantially lowering the bulk density of said coke, said coke having a high sulfur content and having been produced by the delayed coking process, which comprises: (a) heating the coke at a first temperature in the range of about 490° to about 850° C. for a period of time in the range of about 30 to about 60 minutes such that no more than about 70 wt.% of the volatile matter content of said coke is removed therefrom; and (b) heating the partially devolatilized coke at a second temperature of at least about 1500° C. for a period of time in the range of about 30 to about 70 minutes to substantially completely calcine said coke and remove a major portion of the sulfur content therefrom.
Claim 3
Dependent Claim
104 words
A process for calcining and thermally desulfurizing raw petroleum coke without substantially lowering the bulk density of said coke, said coke having a high sulfur content and having been produced by the delayed coking process, which comprises: (a) heating the coke at a temperature of about 500° C. for about 45 minutes such that no more than about 70 wt.% of the volatile matter content of said coke is removed therefrom; and (b) heating the partially devolatilized coke at a temperature of about 1520° C. for 60 minutes to substantially completely calcine said coke and remove a major portion of the sulfur content therefrom.
Claim 4
Dependent Claim
104 words
A process for calcining and thermally desulfurizing raw petroleum coke without substantially lowering the bulk density of said coke, said coke having a high sulfur content and having been produced by the delayed coking process, which comprises: (a) heating the coke at a temperature of about 500° C. for about 45 minutes such that no more than about 70 wt.% of the volatile matter content of said coke is removed therefrom; and (b) heating the partially devolatilized coke at a temperature of about 1520° C. for 60 minutes to substantially completely calcine said coke and remove a major portion of the sulfur content therefrom.
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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) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |