CPC C01B 32/05 (2017.08) [C10L 9/02 (2013.01); C10L 5/02 (2013.01); C10L 2290/24 (2013.01); C10L 2290/545 (2013.01)] | 11 Claims |
1. A method for removing ash from the solid carbonaceous materials comprising:
S1) mixing a sub-molten salt medium of an alkali with a solid carbonaceous material to be treated, heating the mixture to react the alkali with the ash in the solid carbonaceous material to be treated in the sub-molten salt medium of the alkali, and subjecting the reacted mixed slurry to a solid-liquid separation to obtain a first solid product and an alkali treatment liquid, wherein the mass fraction of said alkali in the sub-molten salt medium of the alkali is 50% or more, wherein the mass ratio of the alkali to the solid carbonaceous materials to be treated is 0.1-2:1;
S2) subjecting the first solid product to an acid washing treatment with an acid liquor and performing solid-liquid separation once more to obtain a second solid product and a pickling solution.
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