Carboxymethylcellulose from totally chlorine free-bleached milox pulps

被引：27

作者：

Dapía, S ^{[1
]}

Santos, V ^{[1
]}

Parajó, JC ^{[1
]}

机构：

[1] Univ Vigo, Dept Chem Engn, Orense, Spain

来源：

BIORESOURCE TECHNOLOGY | 2003年 / 89卷 / 03期

关键词：

carboxymethylcellulose manufacture; eucalyptus wood; milox pulping; totally chlorine free bleaching;

D O I：

10.1016/S0960-8524(03)00066-X

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

High purity cellulose pulp was obtained from Eucalyptus globulus wood by using an environmentally friendly delignification technique (Milox pulping) and subsequent bleaching by totally chlorine free technology. The pulp obtained under optimised experimental conditions was used for the manufacture of carboxymethylcellulose in a heterogeneous medium. By means of an experimental design. the effects of selected operational variables on the composition and chemical properties of reaction products from the carboxymethylation reaction were assessed for optimisation purposes. The distribution of the different carboxymethylglucose mole fractions (un-, mono-, di- and tri-substituted) was determined and compared with theoretical predictions. The maximum average degree of substitution (1.26) was determined at a NaOH/cellulose mole ratio of 4.8 and at a MCA/cellulose mole ratio of 2.0. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：289 / 296

页数：8

共 37 条

[1] Totally chlorine free bleaching of Eucalyptus globulus dissolving Pulps delignified with peroxyformic acid and formic acid [J].