Fuel and related compositions – Liquid fuels – Aluminum or heavy metal – other than lead – containing
Patent
1983-07-19
1985-06-11
Dees, Carl F.
Fuel and related compositions
Liquid fuels
Aluminum or heavy metal, other than lead, containing
137 13, 201 17, C10L 902
Patent
active
045226288
ABSTRACT:
A method for removing the ash mineral matter content of coal and transporting the ash free coal from the point of ash removal to a coal use point comprising grinding run-of-mine coal to a desired particle size, mixing the coal particles with water and liquid carbon dioxide in a vessel in a swirling, fluidized state at a pressure, temperature, and for a residence time sufficient to free substantially all of the ash mineral matter from the coal and form an ash free coal/mineral matter slurry, separating the ash free coal particles from the slurry by froth floatation, drying the ash free coal particles, forming a slurry of the ash free coal particles with liquid carbon dioxide, transporting the ash free coal/liquid carbon dioxide slurry by pipeline to a coal use point, deslurrying the ash free coal/liquid carbon dioxide slurry, recovering the ash free coal particles for intended use and recycling the coal-free liquid carbon dioxide recovered from deslurrying for treating additional coal in the ash removal step.
REFERENCES:
patent: 2983673 (1961-05-01), Grove
patent: 4053285 (1977-10-01), Robinson et al.
patent: 4198291 (1980-04-01), Yoo et al.
patent: 4206610 (1980-06-01), Santhanam
Dees Carl F.
Gilman Michael G.
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
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