化学
木质素
纤维素
过氧化氢
凝胶渗透色谱法
萃取(化学)
核化学
水解
酸水解
硝基苯
水溶液
傅里叶变换红外光谱
碱性水解
有机化学
化学工程
聚合物
催化作用
工程类
作者
Xiao Feng Sun,Run Cang Sun,J. Tomkinson,Mark S. Baird
出处
期刊:Cellulose Chemistry and Technology
[Institutul de Chimie Macromoleculara Petru Poni]
日期:2003-01-01
卷期号:37: 283-304
被引量:2
摘要
Alkaline peroxide extraction is an environmentally friendly pulping process allowing the recovery of valuable hemicelluloses and lignin products. Extraction of the dewaxed wheat straw with 2% H 2 O 2 -2 % NaOH aqueous solution for 5 h at 45 and 50° resulted in a dissolution of 85% and 86% of the original lignin, 75% and 76% of the original hemicelluloses, respectively, and left 53.8% and 53.3% residues with light chromatophore, which are very suitable for paper-making, in comparison with other pulps. The two alkaline lignin fractions, two hemicellulosic preparations and the corresponding residues (mainly cellulose) were characterized by both degraded methods, alkaline nitrobenzene oxidation and acid hydrolysis, and non-destructive techniques, Ultraviolet (UV), Fourier transform infrared (FT-IR), hydrogen-1 and carbon-13 Nuclear magnetic resonance spectroscopes ( 1 H and 13 C-NMR) as well as Gel permeation chromatography (GPC).
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