Patent US4100265A successfully refreshed from Google Patents.
US4100265A
Expired / Lapsed
US
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Process for preparation of high quality coke
Assignee: Koa Oil Co Ltd
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Filing: 1976-08-02
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Granted: 1978-07-11
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Expires: 1996-08-02
Abstract
Abstract High quality coke is prepared by calcining green coke obtained by the delayed coking process at a temperature lower than the customarily adopted calcination temperature, once cooling the coke and then calcining the coke at a temperature within the customarily adopted calcination temperature range.
Inventors
- 👤 Kiyoharu Yoshimura
- 👤 Masao Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:46
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/08; C01; C01B; C01B32/00; C01B32/05
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A three-step process for the preparation of high quality coke which comprises calcining a green coke obtained according to the delayed coking process in a first step at a temperature of about 600° to about 900° C., then cooling the coke in a second step to about 100° C. or lower and thereafter calcining the coke in a third step at a temperature of about 1200° to about 1500° C.
Claim 2
Dependent Claim
70 words
A three-step process for the preparation of high quality coke which comprises calcining a green coke obtained according to the delayed coking process in a first step at a temperature of about 600° to about 900° C., then cooling the coke in a second step to about 100° C. or lower and thereafter calcining the coke in a third step at a temperature of about 1200° to about 1500° C.
Claim 3
Dependent Claim
25 words
A process for the preparation of high quality coke according to claim 1 wherein the first stage calcination is carried out at about 800° C.
Claim 4
Dependent Claim
37 words
A process for the preparation of high quality coke according to claim 1 wherein the first stage calcination temperature is attained by elevating the temperature at a rate of about 200° to about 300° C. per hour.
Claim 5
Dependent Claim
45 words
A process for the preparation of high quality coke according to claim 1 wherein the coke is maintained at the first stage calcination temperature for about 0.5 to about 1 hour and at the second stage calcination temperature for about 0.5 to about 1 hour.
Claim 6
Dependent Claim
33 words
A process for the preparation of high quality coke according to claim 1 wherein the green coke is one obtained from an ordinary petroleum type raw material according to the delayed coking process.
Claim 7
Dependent Claim
33 words
A process for the preparation of high quality coke according to claim 1 wherein the green coke is one prepared from an ordinary coal type starting oil according to the delayed coking process.
References Cited (Backward Citations)
US2910411A
Cited
US3112181A
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US3369871A
Cited
US3595963A
Cited
US3712855A
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US3823073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |