PRODUCTION METHODS FOR SOLUBILIZED LIGNIN, SACCHARIDE RAW MATERIAL AND MONOSACCHARIDE RAW MATERIAL, AND SOLUBILIZED LIGNIN

• Main Authors: SAKAMOTO, TETSUO, ONISHI, KIYOTAKA, AZUMA, JUN-ICHI
• Format: Patent
• Language: English; French
• Published: 15.07.2014
• Subjects: APPARATUS THEREFOR; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOUNDS OF UNKNOWN CONSTITUTION; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; DERIVATIVES THEREOF; METALLURGY; NUCLEIC ACIDS; NUCLEOSIDES; NUCLEOTIDES; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER-MAKING; POLYSACCHARIDES; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; SACCHARIDES, OTHER THAN SUCROSE, OBTAINED FROM NATURAL SOURCESOR BY HYDROLYSIS OF NATURALLY OCCURRING DI-, OLIGO- ORPOLYSACCHARIDES; SUGAR INDUSTRY; SUGARS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP

A production method of a solubilized lignin is provided. The method includes: a first step of mixing 100 parts by mass on a dry basis of a powder obtained by pulverizing a lignocellulosic raw material with aqueous hydrogen peroxide in an amount of 20 to 400 parts by mass in terms of hydrogen peroxide and heating the mixture for 5 to 120 minutes at a pressure of 0.1 to 1.5 MPa and a temperature of 80 to 200°C while irradiating the mixture with microwaves; a second step of separating insoluble matter obtained in the first step from the aqueous hydrogen peroxide; a third step of extracting the insoluble matter obtained in the second step with a solvent to produce an extract; and a fourth step of distilling the solvent away from the extract obtained in the third step to yield a residue.