Patent US4762528A successfully refreshed from Google Patents.
US4762528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid fuel from coal and method of making same
Assignee: Individual
•
Filing: 1986-09-05
•
Granted: 1988-08-09
•
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 13:06
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.
References Cited (Backward Citations)
US1815781A
Cited
US1812230A
Cited
US1984380A
Cited
US1964744A
Cited
GB1056184A
Cited
US3764547A
Cited
US3846087A
Cited
US3861885A
Cited
US4069022A
Cited
JPS5145186A
Cited
US3996026A
Cited
US4045092A
Cited
US4185083A
Cited
JPS57139187A
Cited
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 |