Selective hydrolysis of lignocelluloses from corn stalk in an ionic liquid

Authors

  • Wei-ping Yin,

    Corresponding author
    1. School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
    2. The Key Laboratory for Biomass Clean Energy, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
    • School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
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  • Xin Li,

    1. School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
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  • Yun-lai Ren,

    1. School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
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  • Shuang Zhao,

    1. School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
    2. The Key Laboratory for Biomass Clean Energy, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
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  • Jian-ji Wang

    Corresponding author
    1. School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
    2. The Key Laboratory for Biomass Clean Energy, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
    • School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China
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Abstract

In this work, a selective two-stage hydrolysis of lignocelluloses from corn stalk was developed through pH adjustment in 1-n-butyl-3-methylimidazolium chloride ([C4mim]Cl). In the first stage, the lignin–hemicelluloses matrix of corn stalk was disrupted and hydrolyzed in the ionic liquid at pH 4.5 and 90°C to obtain xylose with 23.1% yield. In the second stage, cellulose-rich materials in solid residues were further hydrolyzed in the ionic liquid at pH 2–3 and 90°C to produce glucose with 26.9% yield, and pure lignin was also obtained. Structures of the hydrolysates were identified by 13C NMR and IR spectrum analysis, and the ionic liquid was recycled throughout the process. It is expected that the information provided here would be useful for the development of new methods to selectively produce monosaccharides from catalytic hydrolysis processes of biomass. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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