One-Step Acid Bleachable Pretreatment with a Recyclable Acid Hydrotrope and Chlorate for Biomass Valorization

Pretreatment is a necessary step to converting lignocellulosic biomass from its native form into more accessible for the value-added utilization of main components. Herein, we developed one-step acid bleachable pretreatment method using recyclable hydrotrope (p-toluenesulfonic acid, p-TsOH) and chlorate achieve fibers bleaching lignin extraction simultaneously. Under condition p-TsOH concentration 80 wt.%, temperature °C, time 45 min, 84.33% hemicelluloses 76.79% were dissolved out poplar wood. The obtained dispersed solids with whiteness 60.13% can be used papermaking or ethanol production. results quasi-simultaneous enzymatic saccharification combined fermentation (Q-SSF) pretreated substrate indicated that yield reached 39.30 ± 0.57 g/L 82.36 1.15%, respectively. According characterization, aromatic rings in extracted opened forming dicarboxylic acids as well derivatives due oxidation effect chlorate, which beneficial catalytic upgrading composites preparation. Therefore, this study important valorization biomass.