Utilization of low rank coal and peat

Details Utilization of low rank coal and peat Utilization of low rank coal and peat

1987-06-17

1989-01-24

Davis, Curtis R.

Mineral oils: processes and products

Refining

Purifying used oil

44502, 208179, C10M17500

Patent

active

048000159

ABSTRACT:
Low rank coals including lignite, brown and sub-bituminous coals, and peat containing unacceptably high quantities of water are dried and enriched in BTU content. The mined low rank coal is crushed to between about one-half inch and three inches in diameter and immersed in hot oil to dry the coal. The coal is then screened or centrifuged to remove excess oil and the resulted oil impregnated dried coal has a much higher BTU content. The dried high BTU low rank coal may be then powdered and utilized to form a coal-water liquid fuel.

REFERENCES:
patent: 1868732 (1932-07-01), Dubbs
patent: 3458588 (1969-07-01), Meyer et al.
patent: 4227995 (1980-10-01), Sze et al.
patent: 4306960 (1981-12-01), Gleim
patent: 4334976 (1982-06-01), Yan
patent: 4422922 (1983-12-01), Rosenthal et al.
patent: 4551234 (1985-11-01), Hellinger, Jr.
patent: 4705533 (1987-11-01), Simmons

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