Desulfurization of coal

Details Desulfurization of coal Desulfurization of coal

1980-04-22

1981-10-27

Halper, Robert

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

201 17, 209 9, 209 10, C10L 902

Patent

active

042971080

ABSTRACT:
Pyritic sulfur, organic sulfur and elemental sulfur are removed from coal by subjecting an aqueous slurry of coal to flotation for removal of most of the pyritic sulfur after which the coal obtained from the flotation is treated with dilute nitric acid which oxidizes any remaining pyritic sulfur and most of the organic sulfur, thus solubilizing the sulfur and reducing the sulfur content thereof. This coal can be filtered, washed and dried, if desired. Further reduction of organic sulfur is obtained by chemical treatment with unsaturated hydrocarbons which bind the organic sulfur thus lowering the sulfur content of the coal sufficiently so that the final product meets all requirements for use for power plants as well as for the metallurgical industry.

REFERENCES:
patent: 1329493 (1920-02-01), Baron
patent: 1552197 (1925-09-01), Bates
patent: 2319394 (1943-05-01), Erickson
patent: 3909211 (1975-09-01), Diaz
patent: 3926575 (1975-12-01), Meyers
patent: 3957958 (1976-05-01), Katz
patent: 4025588 (1977-05-01), Dessau
patent: 4083940 (1978-04-01), Das
patent: 4134737 (1979-01-01), Yang
patent: 4158548 (1979-06-01), Burk

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