Process for removing sulfur from coal

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

1980-03-03

1981-10-20

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 24, 201 17, C10L 902

Patent

active

042958580

ABSTRACT:
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 of 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 from pyrite mineral matter and ash to recover coal-hydrocarbon oil agglomerates wherein the coal exhibits reduced sulfur and ash content.

REFERENCES:
patent: 3864223 (1975-02-01), Colwell
patent: 4158548 (1979-06-01), Burk, Jr. et al.
patent: 4224038 (1980-09-01), Masologites et al.

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