Process for removing sulfur from coal

Details Process for removing sulfur from coal Process for removing sulfur from coal

C - Chemistry, Metallurgy

10

L

44/1, 196/11

C10L 9/02 (2006.01) B03B 1/04 (2006.01) B03B 9/00 (2006.01) B03D 3/06 (2006.01)

Patent

CA 1151573

PROCESS FOR REMOVING SULFUR FROM COAL ABSTRACT OF THE DISCLOSURE A process for reducing the sulfur and ash content of coal comprising the steps of: (1) contacting coal particles containing ash and iron pyrite mineral matter with a promoting amount of at least one conditioning agent, said conditioning agent having a ferrous component maintained at a pH of from about 5.5 to 11.0 and being capable of modifying or altering the existing surface characteristics of the pyrite under conditions to effectuate alteration or modification of at least a portion of the contained pyritic sulfur; (2) agglomerating the coal particles while said pyrite surfaces are altered or modified in an aqueous medium with hydrocarbon oil to form coal-hydrocarbon oil agglomerates; (3) separating said coal-hydrocarbon oil agglomerates with pyrite mineral matter and ash to recover coal-hydrocarbon oil agglomerates wherein the coal exhibits reduced sulfur and ash content.

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