METHOD FOR SACCHARIFICATION AND SEPARATION OF PLANT FIBER MATERIAL

摘要

The present invention is to provide a high-purity aqueous saccharide solution by increasing the collection rate of cluster acid which is a hydrolysis catalyst for cellulose in saccharification and separation for cellulose using a cluster acid catalyst. A method of saccharification and separation for plant fiber materials of the present invention comprises: a hydrolysis step of hydrolyzing cellulose contained in the plant fiber materials using a cluster acid catalyst in a pseudo-molten state to produce saccharide, most of which is glucose; a first separation step of separating a mixture containing an aqueous saccharide solution in which at least a portion of the saccharide produced in the hydrolysis step is dissolved, a cluster acid organic solvent solution in which the cluster acid catalyst is dissolved, and residues into a solid content containing the residues and a liquid content containing the aqueous saccharide solution and the cluster acid organic solvent solution; and a second separation step of dehydrating the liquid content, which contains the aqueous saccharide solution and the cluster acid organic solvent solution and is separated in the first separation step, by a dehydration means capable of absorbing water through chemical absorption to deposit the saccharide in the aqueous saccharide solution, and separating a solid content containing the saccharide from a liquid content containing the cluster acid catalyst and the organic solvent.