Process for preparing monosaccharide solution from straw-type lingocellulose by gradient acid treatment

Abstract

Disclosed is a process for preparing a monosaccharide solution from a straw-type lignocellulose by gradient acid treatment, including the following steps: S1: subjecting a lignocellulosic biomass to a first acidolysis reaction catalyzed by an acid solution with a concentration of more than 50 wt % to obtain a first acidolysis liquid; S2: evenly mixing the first acidolysis liquid with an organic solvent, and performing solid-liquid separation to obtain a glycan-containing residue; and S3: adding water and/or an acid solution to the glycan-containing residue to obtain a mixture with an acid concentration of less than 45 wt %, and performing a second acidolysis reaction to obtain a monosaccharide-containing reaction liquid. In the invention, the pretreatment is carried out at room temperature and atmospheric pressure without additional energy input, and all reagents used in the pretreatment process are recyclable, which greatly reduces the production cost.

Dependencies are inferred from the claim text.