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Selective hydrolysis of lignocelluloses from corn stalk in an ionic liquid
Author(s) -
Yin Weiping,
Li Xin,
Ren Yunlai,
Zhao Shuang,
Wang Jianji
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38759
Subject(s) - ionic liquid , hydrolysis , cellulose , xylose , lignin , stalk , hydrolysate , chemistry , yield (engineering) , monosaccharide , organic chemistry , biomass (ecology) , chemical engineering , materials science , catalysis , agronomy , fermentation , composite material , horticulture , biology , engineering
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 ([C 4 mim]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 13 C 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