Patent ID: 8038840
Filing Date: 2011-10-18
Classification: C07G,C08B,C08H,C13K,D21C

Abstract:
1. A process for producing cellulose, lignin and xylose from biomass material, the process comprising: (1) pulverizing and screening the biomass material, soaking the biomass material in organic acid followed by heating, resulting in a fluidified biomass material, and cooling the fluidified biomass material; (2) adding organic solvent, wherein the solvent has a boiling point that is higher than the boiling point of the organic acid, into the cooled fluidified biomass material, resulting in a mother solution and a precipitate comprising cellulose, then separating the precipitate from the mother solution, followed by washing and drying the precipitate to obtain amorphous cellulose; (3) distilling the mother solution and recovering the organic acid, cooling the distilled mother solution resulting in a second mother solution and a precipitate comprising xylose and xylo-oligosaccharide, and then separating the precipitate from the second mother solution, and washing and drying the precipitate to obtain xylose and xylo-oligosaccharide; (4) distilling the second mother solution and recovering the organic solvent, and separating the resulting precipitate from the distilled mother solution and drying the precipitate to obtain lignin.