Method of Obtaining a High Quality Coke from Low Rank Coal Liquefaction
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United States of America Patent
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Oct 14, 2014
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May 24, 2007
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Abstract
The present disclosure provides methods and systems for coal liquefaction and obtaining a high quality coke from a low rank coal extract. A method of obtaining a high quality coke from a low rank coal extract may include exposing coal to a hydrogenated vegetable oil in the presence of a coal-derived solvent to form a slurry, elevating the temperature of the slurry to facilitate liquefying the coal and liberating a volatile matter, separating the insoluble components from the slurry to obtain a de-ashed coal extract that is quinoline insoluble-free, distilling the coal extract under vacuum to obtain a pitch with a suitable softening point, and coking the pitch to obtain a coke. The coke may be at least one of an anisotropic coke, a metallurgical coke, a graphite coke, an anode coke, and a needle coke.
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