Process for reducing the sulfur content of coal

Details Process for reducing the sulfur content of coal Process for reducing the sulfur content of coal

1978-11-29

1980-05-20

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

423578A, C10L 910, C01B 1714

Patent

active

042037271

ABSTRACT:
Raw coal containing sulfur impurities and water is ground in a vapor-tight extraction zone in contact with a combustible sulfur solvent at an elevated temperature. An extraction mixture slurry is formed which includes a liquid component comprising the solvent and sulfur impurities and a solid component comprising the comminuted, extracted coal. The liquid and solid components of the slurry are separated. At least a portion of the liquid component is preferably treated to separate sulfur. The liquid component is recycled to the extraction zone.
If the solid slurry component has an undesirably high pyrite content, it is then reacted with a reagent to decompose the pyrites to water-soluble sulfur compounds and the reaction mixture is washed with water.

REFERENCES:
patent: 44817 (1864-10-01), Penniman
patent: 3063817 (1962-11-01), Simpson
patent: 3926575 (1975-12-01), Meyers

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