SODA PULPING OF BAGASSE - DELIGNIFICATION PHASES AND KINETICS

被引：11

作者：

SABATIER, J ^{[1
]}

PENICHE, C ^{[1
]}

FERNANDEZ, N ^{[1
]}

机构：

[1] UNIV HAVANA, FAC CHEM, HAVANA, CUBA

来源：

HOLZFORSCHUNG | 1993年 / 47卷 / 04期

关键词：

DELIGNIFICATION; ALKALINE PULPING; SODA PULPING; BAGASSE; KINETICS;

D O I：

10.1515/hfsg.1993.47.4.313

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The aim of this work has been to ascertain the effect of hemicellulose removal and bagasse drying on selectivity, extension and rate of soda delignification. To this end, three bagasse samples (standard, air dried and partially hydrolysed) were pulped at different temperature and active alkali doses according to a three-level factorial design. It was concluded that bagasse delignification occurs only in two phases (''bulk'' and ''residual''), lignin being removed from,the very beginning of pulping. The initial polysaccharides removal stage, present in wood delignification, does not take place for bagasse. A two phases exponential equation has been found suitable for modeling bagasse delignification kinetics. Results confirm that bagasse drying renders delignification difficult because of diffusion restrictions, while hemicelluloses removal makes it easier.

引用

页码：313 / 317

页数：5

共 25 条

[1]

AXEGARD P, 1978, SVEN PAPPERSTIDN, V81, P97

[2]

AXEGARD PS, 1978, SVENSK PAPPERSTIDNIN, V81, P104

[3] THEORY OF BRANCHING PROCESSES AND STATISTICS OF RUBBER ELASTICITY [J].