METHOD OF PRODUCING LIGNINE SORBENT Russian patent published in 2013 - IPC B01J20/24 B01J20/30 

FIELD: process engineering.

SUBSTANCE: invention relates to producing sorbents from wood chemical treatment wastes. Proposed method comprises extraction of impurities from lignine-bearing stock that represent byproduct of cellulose production by wood shavings delignification in medium acetic acid-hydrogen peroxide in the presence of sulfuric catalyst. Said extraction is carried out by 0.4%-solution of sodium bicarbonate at a room temperature, duty 2, in mixing for 15 min followed by separation of extract, flushing it with water and drying of target product.

EFFECT: simplified process, better properties.

3 ex, 1 tbl