PROCESS FOR THE PREPARATION OF GLUCOSE FROM VEGETABLE FIBROUS MATERIALS

摘要

The use of oxo acids of phosphorus as the solvent enables the dissolution of difficulty soluble vegetable fibrous materials. Glucose can be prepared in a high yield by dissolving a vegetable fibrous material in a solvent comprising an oxo acid of phosphorus, neutralizing the obtained solution with an inorganic acid catalyst or an alkaline solution, and bringing the resulting solution into contact with an enzyme to thereby efficiently hydrolyze the polysaccharides contained in the vegetable fibrous material under such mild conditions as not to cause any seconday decomposition. The solvent to be used in the dissolution of vegetable fibrous materials is preferably one comprising an aqueous solution of at least one member selected from the group consisting of phosphoric acid, phosphonic acid, phosphinic acid and metaphosphoric acid, with the concentration being 70 % by weight or above.