公开(公告)号：US20190249363A1

公开(公告)日：2019-08-15

申请号：US16340669

申请日：2017-10-06

Applicant: Clariant International Ltd.

Inventor： Manuela FRICK ,  Franz EFFENBERGER

IPC: D21C1/02 ,  C12P7/10 ,  D21C1/06 ,  D21C9/14 ,  D21C1/04 ,  D21C9/153 ,  D21C9/16

CPC classification number: D21C1/02 ,  C12P7/10 ,  C12P2201/00 ,  C12P2203/00 ,  D21C1/04 ,  D21C1/06 ,  D21C3/00 ,  D21C3/02 ,  D21C3/04 ,  D21C9/144 ,  D21C9/153 ,  D21C9/163 ,  D21C9/166 ,  D21C11/00 ,  D21C11/0007

Abstract: A process for obtaining cellulose, hemicellulose and lignin from lignocellulose can be carried out in an environmentally friendly manner when it comprises the following steps: step a) wherein a lignocellulose from plant biomass is provided, step b) wherein the lignocellulose is brought into contact with a first mixture M1 containing water and an alkaline component, and a first suspension S1 forms, the first suspension S1 comprises a first solid F1 and a first liquid phase P1, wherein the first solid F1 contains a crude cellulose, and the first liquid phase P1 contains hemicellulose and lignin, and step c) wherein the crude-cellulose-containing solid F1 is brought into contact with a second mixture M2 containing formic acid and water and optionally acetic acid, and a second suspension S2 forms, the second suspension S2 comprises a second solid F2 and a second liquid phase P2, wherein the second solid F2 contains a pure cellulose, and the second liquid phase P2 contains hemicellulose and lignin.