P-16　木材のtert-ブチルアルコール/濃硫酸加水分解系の大規模化に向けた検討

抄録

Concentrated sulfuric acid hydrolysis of lignocellulose is widely used to convert polysaccharides to monosaccharides in high yield, but highly condensed lignin with low-chemical reactivity is also obtained as a byproduct. We previously reported that tert-butyl alcohol (TBA) efficiently prevented lignin condensation in the concentrated sulfuric acid hydrolysis. In this study, the TBA/concentrated sulfuric acid hydrolysis system was scaled up to 10-fold, and acquired tert-butyl alcohol lignin (TBL) was characterized by TGA, TMA and FT-IR analysis. The TBL produced in the large scale contaminated polymerized TBA, which induced different thermal response compared to the TBL obtained in a small scale. Hexane was found to be a suitable solvent to remove the polymerized TBA from TBL prepared in large scale.