| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing ashless coal, by which the ashless coal can be obtained in a high yield and at a low cost without relating to the kind of raw material coal. Ž<P>SOLUTION: There is provided the method for manufacturing the ashless coal, characterized by comprising a first slurry heating step (S1) for heat-treating a slurry prepared by mixing coal and an aromatic solvent, a first separation step (S2) for separating the heat-treated slurry into a liquid component and a solid component, a second slurry heating step (S3) for heat-treating slurry prepared by adding and mixing a hydrogen donor solvent into the solid component at a temperature higher than or equal to the temperature of the heat treatment in the first slurry heating step (S1), a second separation step (S4) for separating the heat-treated slurry into a liquid component and a solid component, and an upgraded coal acquisition step (S5) for acquiring ashless coal by removing the solvent from the liquid component, and further acquiring ashless coal by removing the solvent from the liquid component separated in the first separation step. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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