Physico-chemical characterization of organosolv lignins from wheat straw

被引：0
|
作者：
Sun, RC [1 ]
Lawther, JM [1 ]
Banks, WB [1 ]
机构：
[1] UNIV COLL N WALES,SCH AGR & FOREST SCI,BANGOR LL57 2UW,GWYNEDD,WALES
来源：
CELLULOSE CHEMISTRY AND TECHNOLOGY | 1997年 / 31卷 / 3-4期
关键词：
wheat straw; lignin; organosolv delignification; ethanol; phenolic acids and aldehydes; alkaline nitrobenzene oxidation; molecular weight; polysaccharides; FT-IR spectra; C-13-NMR spectroscopy;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
The effects of reaction time and acid concentration on the yield of lignin released in organosolv processes were investigated in this paper. 1.0 N2SO4 catalysed aqueous ethanol (ethanol-water, 60/40, v/v) treatment at 75 degrees for 2 h resulted in more than 40% lignin removal and over 50% hemicelluloses release. The chemical compositions of the isolated organosolv lignins are reported. The characteristics of the lignin fractions were further investigated by gel-permeation chromatography (GPC), Fourier transform infrared (FT-IR) and C-13 nuclear magnetic resonance (NMR) spectroscopy.
引用
收藏
页码：199 / 212
页数：14
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