Method for treating coal to obtain a refined carbonaceous materi

Details Method for treating coal to obtain a refined carbonaceous materi Method for treating coal to obtain a refined carbonaceous materi

1980-03-07

1982-03-16

Konopka, P. E.

Mineral oils: processes and products

Phenolic or toxic oils

44 1B, 203 66, C10G 104, C10L 500

Patent

active

043199801

ABSTRACT:
A process is described for obtaining a refined, carbonaceous product from essentially raw coal by treating the coal with an amine solution to dissolve a portion of the coal, leaving undissolved coal and waste material such as ash. The dissolved coal is separated from the undissolved components and the amine removed to leave the refined carbonaceous extract of the invention. The undissolved coal and waste are separated and amine removed from the undissolved coal to produce a residue. Amine is advantageously recovered for further use. Prior to treatment with amine the coal may be subjected to pre-treatment such as crushing, drying or digestion in alkali metal carbonate solution. Residual amine is advantageously removed from the refined product and residue by stripping with alcohol.

REFERENCES:
patent: 3558468 (1971-01-01), Wise
patent: 3607717 (1971-09-01), Roach
patent: 4029567 (1977-06-01), Farnand et al.
patent: 4095955 (1978-06-01), Stambaugh
Action of Solvents on Coals at Lower Temperatures, I. G. C. Dryden, "Fuel", vol. XXX, 2, pp. 39-44, (1949).

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