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Functional Acidic Ionic Liquids as Effective Solvents for the Fractionation of Lignocelluloses

文献类型： 外文期刊

作者： Dong, Shi Jia 1 ; Zhang, Bi Xian 3 ; Zhang, Peng 1 ; Wu, Kun Yang 1 ; He, Xin Miao 2 ; Ding, Wei 1 ; Gao, Yun Fei 3 ; Liu 1 ;

作者机构： 1.Northeast Agr Univ, Harbin 150030, Heilongjiang, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Combining Farming & Anim Husb, Harbin 150086, Heilongjiang, Peoples R China

3.Heilongjiang Acad Agr Sci, Harbin 150086, Heilongjiang, Peoples R China

关键词： Ionic liquids; Corn stalks; Fractionation; Lignin degradation products

期刊名称：BIORESOURCES （ 影响因子：1.614； 五年影响因子：1.923 ）

ISSN： 1930-2126

年卷期： 2019 年 14 卷 2 期

页码：

收录情况： SCI

摘要： There is increasing interest in the application of ionic liquids for the pretreatment and fractionation of lignocelluloses. In this study, a series of functional acidic ionic liquids (ILs) with various heterocyclic organic cations were synthesized. Corn stalks were successfully fractionated into lignin, hemicelluloses, and cellulose when ultrasonically pretreated with ILs at 70 degrees C for 3 h, and subsequently treated with alkaline extraction. High yields of IL-isolated lignin (18.3% to 19.6%) and (8.3% to 14.6%) were obtained using ILs in the absence and presence of water, respectively. The yield of cellulose ranged from 40.0 to 77.0% from IL treatments, whereas the yield of hemicelluloses ranged from 1.1% to 17.3%. Enzymatic hydrolysis of the isolated cellulose residual produced 89.2% to 94.9% reducing sugar with 77.8% to 86.1% glucose, which corresponded to 80.5% to 91.4% enzymatic conversion of cellulose. Syringol and vanillin were found as the main lignin degradation products.

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