Method of producing cellulose, lignin and xylose by biomass material

Abstract

A method for using biomass to produce cellulose, lignin and wood sugar comprises that breaking and screening the biomass, using low-boiling-point organic acid to immerge to decompose the biomass into wood sugar and oligosaccharide, and fluidize the cellulose and lignin, cools the liquid biomass after reaction, adds organic solvent, mixes uniformly and lays, after deposits completely, separating deposits and washes, dries to obtain non-shaped cellulose, distills the mother liquid of cellulose, recycles organic acid and generated volatile organics, distills mother liquid, cools and lays until complete deposition, separates deposits, washes, and dries to obtain wood sugar and oligosaccharide, evaporates to recycle the wood sugar and the organic solvent of deposited mother liquid, then separates the deposits, and dries to obtain lignin. The invention can completely circulate organic acid and organic solvent without waste discharged.

Description

technical field

[0001] The invention relates to a method for refining and producing cellulose, lignin and xylose from biomass raw materials in the technical field of bioengineering. Background technique

[0002] Biomass refers to a variety of biological substances that organisms use photosynthesis to synthesize carbon dioxide cycle. It can store solar energy chemically. It is carbon stored in the biosphere in a renewable form. It is an important link in the carbon cycle on the earth. The main forms of biomass are forest trees such as branches, agricultural straw such as wheat straw, rice straw, and corn stalk, and grasses such as miscanthus. These substances are mainly composed of cellulose, hemicellulose and lignin cross-linked and bonded to each other to form a dense texture, which is difficult to separate and degrade. Therefore, the dissociation processing of biomass raw materials is one of the biggest technical bottlenecks of bioutilization. The breakthrough of this te...