Welcome to Chemistry and Industry of Forest Products,

Chemistry and Industry of Forest Products ›› 2020, Vol. 40 ›› Issue (3): 12-22.doi: 10.3969/j.issn.0253-2417.2020.03.002

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A Review of Deep Eutectic Solvents for Lignin Isolation

Lei ZHONG,Chao WANG,Gaojin LYU*(),Xingxiang JI,Guihua YANG,Jiachuan CHEN   

  1. State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology(Shandong Academy of Sciences), Jinan 250353, China
  • Received:2019-11-07 Online:2020-06-28 Published:2020-06-29
  • Contact: Gaojin LYU E-mail:gaojinlv@qlu.edu.cn


Lignin is the most abundant renewable aromatic polymer in nature, which complex structure and compact connection with cellulose and hemicellulose through covalent bond and hydrogen bond make it difficult to be separated efficiently. Deep eutectic solvents (DES) is a novel kind of green ionic liquid, which has been successfully applied to lignin isolation due to its unique physical and chemical properties. The research progress of dissolution and extraction of lignin by deep eutectic solvents (DES) is reviewed in detail. From the point of view of the mechanism of dissolving lignin by DES, the effects of different factors(composition, proportion, pH value, functional groups of DES, water content of system, raw material, reaction time, temperature, catalyst, co-solvent, and so on) on lignin removal were emphatically expounded. Based on the research progress of DES in lignin extraction, the research progress and futuer application of lignin extraction were summarized and prospected.

Key words: deep eutectic solvents, lignin, dissolution, extraction

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