CONCENTRATED ACID TREATMENT UNIT, CONCENTRATED ACID TREATMENT METHOD, PHASE-SEPARATION SYSTEM PLANT FOR BOTANICAL RESOURCE, AND CONVERSION METHOD

摘要

Provided is a Phase-Separation system plant for botanical resource, a conversion method, a concentrated acid treatment unit, and a concentrated acid treatment method by which lignin derivatives and hydrolyzed carbohydrate are manufactured out of a botanical resource efficiently and continuously. A concentrated acid treatment unit (3) is composed of a reaction section (20) and an agitation extraction section (25). A phenol sorped raw material (16) obtained by defatting botanical resource-derived raw material (15) by solvent (14) to subject sorption phenols (13) to sorption is introduced, thus obtaining mixed solution of phenol solution including a lignophenol derivative and concentrated acid solution including a cellulose hydrolysate. The reaction section (20) agitates and mixes the phenol sorped raw material (16) and concentrated acid (21A) to cause cellulose to be swollen to thereby convert lignin to lignophenol. A part of the cellulose is subjected to hydrolysis. The agitation extraction section (25) receives the treated liquid sent from the reaction section (20) and adds phenols for extraction (33) thereto to cause lignophenol dispersed in the concentrated acid solution to be dissolved and extracted in phenols for extraction.