Patent ID: 9133227
Filing Date: 2015-09-15
Classification: C07G,C07H,D21C

Abstract:
1. A production method of a solubilized lignin, comprising: 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.