Method for removing ash from solid carbonaceous material

US12012334B2 · kind B2 · utility

Assignee

• National Institute of Clean-and-Low-Carbon Energy · CN

Inventors

• Lijun Zhao · Beijing, CN
• Wenhua Li · Dongguan, CN
• Aiguo Chen · Beijing, CN
• Fan Jin · Stuttgart, DE
• Xiaolin Jiang · Stockholm, SE
• Huidong Liu · Beijing, CN
• Yongfeng Xiao · Haikou, CN

Key dates

• Filing date: Sep 26, 2019
• Grant date: Jun 18, 2024
• Expiry date: Jun 11, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L2290/545
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for removing ash from a solid carbon material: Reaction conditions are mild, and ash may be removed more effectively. The ash removing method comprises: S1) mixing an alkaline sub-molten salt medium and a solid carbonaceous material to be treated, heating so that alkali and ash in the solid carbonaceous material to be treated react in the alkaline sub-molten salt medium, and performing solid-liquid separation on a mixed slurry resulting from the reaction to obtain a first solid product and an alkali treatment solution, wherein in the alkaline sub-molten salt medium, the mass fraction of the alkali is greater than or equal to 50%; S2) using an acid solution to perform acid cleaning treatment on the first solid product, and performing solid-liquid separation again to obtain a second solid product and an acid cleaning solution.