US4762528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid fuel from coal and method of making same
Assignee: Individual
•
Filing: 1986-09-05
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Granted: 1988-08-09
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Expires: 2006-09-05
Abstract
Abstract Coal is gasified to produce carbon monoxide which is converted to carbon by a reverse Boudouard reaction 2CO→CO.sub.2 +C The carbon dioxide is recycled and reacted with coal to create more carbon monoxide by the Boudouard reaction CO.sub.2 +C→2CO The resulting carbon is recovered and mixed with a liquid to form a liquid slurry of particulate carbon which is useful as a liquid fuel. The liquid may be water or hydrocarbonaceous liquids. The process optimizes recovery of carbon from coal in a usable form, substantially free of sulfur, hydrogen, ash and nitrogen.
Inventors
- 👤 Eric H. Reichl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:50
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/54; C10J3/56; C10L; C10L1/00; C10L1/32; C10L1/322; C10L1/326; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0969; C10J2300/18; C10J2300/1807; C10J2300/1815
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
A method for generating from coal a liquid fuel in the form of a combustible liquid carbon slurry comprising: a. reacting substantially the entire said coal with oxygen and carbon dioxide in a gas generation chamber to produce products consisting essentially of ash and carbon monoxide entrained in a gas stream with reacted gases and other gases; b. passing said gas stream into a reaction chamber containing catalyst for the reverse Boudouard reaction to convert the carbon monoxide into carbon dioxide and free carbon and recovering the free carbon from the reaction chamber; c. separating the gases in said reaction chamber into carbon dioxide and residue gases; and d. returning at least a portion of the carbon dioxide rich gas stream to the said gas generation chamber for reaction with coal; e. recovering the said residue gas stream.
Claim 2
Independent Claim
138 words
A method for generating from coal a liquid fuel in the form of a combustible liquid carbon slurry comprising: a. reacting substantially the entire said coal with oxygen and carbon dioxide in a gas generation chamber to produce products consisting essentially of ash and carbon monoxide entrained in a gas stream with reacted gases and other gases; b. passing said gas stream into a reaction chamber containing catalyst for the reverse Boudouard reaction to convert the carbon monoxide into carbon dioxide and free carbon and recovering the free carbon from the reaction chamber; c. separating the gases in said reaction chamber into carbon dioxide and residue gases; and d. returning at least a portion of the carbon dioxide rich gas stream to the said gas generation chamber for reaction with coal; e. recovering the said residue gas stream.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the said liquid is water and the resulting product is an aqueous carbon slurry.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the said liquid is a combustible liquid and the resulting product is a slurry of particular carbon in combustible liquid.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the resulting slurry contains 55 to 75 weight percent particulate carbon.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein the said gas generation chamber is a fluidized bed reaction vessel.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |