A new and facile method for isolation of lignin from wood based on complete wood dissolution

被引：63

作者：

Fasching, Mario ^{[2
]}

Schroeder, Philipp ^{[2
]}

Wollboldt, R. Petra ^{[2
]}

Weber, Hedda K. ^{[2
]}

Sixta, Herbert ^{[1
]}

机构：

[1] Lenzing AG, A-4860 Lenzing, Austria

[2] Kompetenzzentrum Holz GmbH, A-4021 Linz, Austria

来源：

HOLZFORSCHUNG | 2008年 / 62卷 / 01期

关键词：

beech; dissolved wood lignin (DWL); lignin; lignin isolation; milled wood lignin (MWL); nuclear magnetic resonance;

D O I：

10.1515/HF.2008.003

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

A new method for the isolation of lignin in high yield from wood and pretreated wood is presented, avoiding the liquid-solid extraction step of the classical milled wood lignin (MWL) isolation. Dissolved wood lignin (DWL) was obtained by total dissolution of ball milled wood in dimethylsulfoxide and N-methylimidazole (DMSO/NMI) followed by precipitation in dioxane/water in the course of which lignin and carbohydrate fractions were separated. The lignin fraction was purified. High lignin yields and the low number of separation steps belong to the advantages of the described method. DWL lignin was isolated from beech wood (Fagus sylvatica L.) and the sample was compared to MWL obtained by the classical Bjorkman method. Elemental analyses, methoxyl group content, potassium permanganate oxidation, infrared spectroscopy, and 1D and 2D nuclear magnetic resonance spectroscopy indicated that both lignin preparations are quite similar. However, MWL contained significantly more phenolic hydroxyl groups than DWL. The results indicated that MWL contains higher amounts of smaller fractions with broken beta-O-4 linkages than DWL.

引用

页码：15 / 23

页数：9

共 26 条

[1]

Bjorkman A., 1956, SVEN PAPPERSTIDN, V59, P477, DOI DOI 10.1016/J.CHROMA.2003.08.046

[2] A comprehensive approach for quantitative lignin characterization by NMR spectroscopy [J].