US 12,012,334 B2
Method for removing ash from solid carbonaceous material
Lijun Zhao, Beijing (CN); Wenhua Li, Beijing (CN); Aiguo Chen, Beijing (CN); Fan Jin, Beijing (CN); Xiaolin Jiang, Beijing (CN); Huidong Liu, Beijing (CN); and Yongfeng Xiao, Beijing (CN)
Assigned to NATIONAL INSTITUTE OF CLEAN-AND-LOW-CARBON ENERGY, Beijing (CN)
Appl. No. 17/284,594
Filed by National Institute of Clean-and-Low-Carbon Energy, Beijing (CN)
PCT Filed Sep. 26, 2019, PCT No. PCT/CN2019/108066
§ 371(c)(1), (2) Date Apr. 12, 2021,
PCT Pub. No. WO2020/073813, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 201811190698.2 (CN), filed on Oct. 12, 2018.
Prior Publication US 2021/0347640 A1, Nov. 11, 2021
Int. Cl. C01B 32/05 (2017.01); C10L 5/02 (2006.01); C10L 9/02 (2006.01)
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
OG exemplary drawing
 
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.