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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Published on: March 9, 2021

Breakthrough of lignin valorization: A novel alcohol-dichoromethane binary mixture solvent for lignin dissolution

Yingying Yang¹, Jingyu Xu¹, Yue Kong¹

¹Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.

International Journal of Biological Macromolecules

|November 7, 2022

Abstract:

A novel binary solvent system consisting of alcohols (e.g., methanol, ethanol, isopropanol) and dichloromethane was developed as an efficient dissolution system for dissolving various types of lignin. It was found that in this dissolution system, adjusting the volume ratio of alcohol and dichloromethane will significantly affect the solubility of lignin. At the same time, this study proposed that the reason why the solvent can dissolve lignin was the hydrophobic skeleton and hydrophilic groups can be solvated by dichloromethane and alcohols respectively, which significantly promoted the dissolution of lignin. Furthermore, the solvent did not significantly alter the structure of the lignin. The proposed novel solvent is simple, efficient, versatile and flexible, can adapt to the high diversity of lignin, and has broad application prospects.

Keywords:

Alcohol-dichoromethane binary mixture solvent Dissolution Lignin NMR analysis

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