Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Robert R French0
Robert A. Reeves0
Date of Patent
October 31, 2006
0Patent Application Number
108843930
Date Filed
July 1, 2004
0Patent Primary Examiner
Patent abstract
The ash content of raw coals, lignite, and other carbonaceous materials is reduced by leaching the high-ash material with an aqueous acidic waste product produced by a Fischer-Tropsch reaction. The acidic aqueous waste is mixed with coal and process conditions are described. The claim takes advantage of using otherwise uneconomic coal, lignite or other carbonaceous material by upgrading the material to a suitable feedstock for combustion in a power plant or gasifier.
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