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U.S. Department of Energy
Office of Scientific and Technical Information

Method for treating coal to obtain a refined carbonaceous material

Patent ·
OSTI ID:5219806
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.
Assignee:
EDB-82-136294
Patent Number(s):
US 4319980
OSTI ID:
5219806
Country of Publication:
United States
Language:
English