Solvent dewatering coal

Details Solvent dewatering coal Solvent dewatering coal

1982-11-18

1984-07-17

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

F26B 300, C10L 500

Patent

active

044597622

ABSTRACT:
Drying of wet coal is facilitated by the addition of a nonaqueous solvent, such as acetone, to the coal followed by application of heat to remove both solvent and water from the coal. The coal may be further upgraded by briquetting or pelletizing fine coal particles with waxes and resins extracted from the coal, or the waxes and resins may be left on the coal to reduce the tendency of the coal to reabsorb water. In addition, minerals such as sodium and potassium salts may be removed from the coal to reduce slagging and fouling behavior of the coal.

REFERENCES:
patent: 3327402 (1967-06-01), Lamb et al.
patent: 3953927 (1976-05-01), Hoffert
patent: 4235603 (1980-11-01), Miller et al.

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