US4011303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for desulfurizing sulfur-bearing coke
Assignee: Individual
•
Filing: 1975-11-12
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Granted: 1977-03-08
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Expires: 1995-11-12
Abstract
Abstract Sulfur-bearing coke is desulfurized by heating it and reacting it with dilute sulfur vapor to form carbon disulfide. The reaction will proceed utilizing air-polluting sulfur components in the coke, thereby removing such components to provide a relatively non-polluting coke as a fuel.
Inventors
- 👤 Douglas MacGregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:25
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A process of desulfurizing sulfur-bearing coke, comprising the steps of heating a sulfur-bearing coke; passing a diluted elemental sulfur vapor through the heated coke, the temperature of the coke being such that said sulfur vapor will react with the sulfur compounds and complexes in the combustible portion of the coke to form carbon disulfide, which reaction thereby removes sulfur values originally carried by the combustible portion of said coke; controlling the reaction time so that the reaction will not continue substantially beyond the time that sulfur values originally carried by the combustible portion of said coke have been consumed; controlling the reaction environment so that the sulfur vapor is the only active element present and recovering the desulfurized coke.
Claim 2
Dependent Claim
119 words
A process of desulfurizing sulfur-bearing coke, comprising the steps of heating a sulfur-bearing coke; passing a diluted elemental sulfur vapor through the heated coke, the temperature of the coke being such that said sulfur vapor will react with the sulfur compounds and complexes in the combustible portion of the coke to form carbon disulfide, which reaction thereby removes sulfur values originally carried by the combustible portion of said coke; controlling the reaction time so that the reaction will not continue substantially beyond the time that sulfur values originally carried by the combustible portion of said coke have been consumed; controlling the reaction environment so that the sulfur vapor is the only active element present and recovering the desulfurized coke.
Claim 3
Dependent Claim
32 words
A process according to claim 1, wherein the elemental sulfur vapor is diluted with an inert gas to a concentration by volume in the range of about 1% to 10% sulfur vapor.
Claim 4
Dependent Claim
32 words
A process according to claim 2, wherein the elemental sulfur vapor is diluted with an inert gas to a concentration by volume in the range of about 2% to 3% sulfur vapor.
Claim 5
Dependent Claim
12 words
A process according to claim 3, wherein the inert gas is nitrogen.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein the coke is heated to a temperature in the range of about 1150° F. to about 3000° F.
Claim 7
Dependent Claim
25 words
A process according to claim 5, wherein the coke is heated to a temperature in the range of about 1800° F. to about 2200° F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |