Method for obtaining cellulose, hemicellulose and lignin from lignocellulose derived from plant biomass

摘要

The method for obtaining cellulose, hemicellulose and lignin from lignocellulose can be carried out environmentally if it includes the following steps: step a) providing lignocellulose derived from plant biomass b) Lignocellulose is contacted with a first mixture M1 comprising water and an alkali component to form a first suspension S1, which is a first solid F1 and a first liquid phase. The first solid phase F1 contains crude cellulose and the first liquid phase P1 contains hemicellulose and lignin, and step c) the crude cellulose-containing solid F1 with formic acid and water and Contact with a second mixture M2, optionally containing acetic acid, to form a second suspension S2, said second suspension being Includes solid F2 and the first liquid phase P2, step the second solid F2 contains pure cellulose and the second liquid phase P2 of said containing hemicellulose and lignin.