Lignin behavior during the autocatalyzed methanol pulping of Eucalyptus globulus -: Changes in molecular weight and functionality

被引：36

作者：

Gilarranz, MA ^{[1
]}

Rodríguez, F ^{[1
]}

Oliet, M ^{[1
]}

机构：

[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Ingn Quim, Madrid 28024, Spain

来源：

HOLZFORSCHUNG | 2000年 / 54卷 / 04期

关键词：

lignin; organosolv pulping; Eucalyptus globulus; methanol; phenolic hydroxyl; carbonyl; central composite design;

D O I：

10.1515/HF.2000.064

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The molecular weight distribution and functional group contents (phenolic and carbonyl) of lignin samples from the autocatalyzed pulping of Eucalyptus globulus wood were determined. A total of 17 pulping runs were carried out at different conditions according to a surface response design experimental matrix (central composite). The influence of pulping temperature (170-200 degrees C), pulping time (40-120 min) and methanol concentration (30-70 %, w/w) on the characteristics of the isolated lignins was studied. Empirical models were developed and used to predict the lignin properties as a function of the cooking conditions. Under high temperature, long cooking time and low alcohol concentration, a rise in functional groups content and a drop in molecular weight of lignin can be observed.

引用

页码：373 / 380

页数：8

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