中国造纸学报2012，Vol.27Issue(4)：1-5,5.
硫酸盐竹浆两段氧脱木素目标脱木素率的确定
Determination of Target Delignification Rate of Kraft Bamboo Pulp in Two Stages Oxygen Delignification
陈秋艳 1罗小林 2曹石林 2陈礼辉 2马晓娟 2黄六莲2
作者信息
- 1. 福建农林大学生命科学学院,福建福州,350002
- 2. 福建农林大学材料工程学院,福建福州,350002
- 折叠
摘要
Abstract
The effects of oxygen delignification parameters on the delignification rate and viscosity reduction rate, and the relation between delignification rate and the contents of a-cellulose, pentosan and ash contents of the oxygen delignified pulps were investigated in this paper. It was found that the proper target delignification rate was approximately 68% after optimization of two stages oxygen delignification. The corresponding alkali charge (as NaOH) ,oxygen pressure, reaction temperatures and durations for two stages oxygen delignification were 3. 0% , 0.9 MPa, 80℃ , 40 min and 2. 0% , 0. 3 MPa, 100℃ , 60 min, respectively. Although pentosan content of oxygen delignified pulps decreased once beyond this target delignification rate, the increase of α-cellulose content was not significant while the viscosity reduction rate was obviously increased. Moreover, it was also found that, when the total alkali charge of two stages oxygen delignification was higher than 5.0% , the decrease rate of viscosity would be accelerated correspondingly at the transition point of delignification rate of approximately 64% . Therefore, to avoid the significant reduction of pulp viscosity but simultaneously increase the delignification rate of kraft bamboo pulps in two stages oxygen delignification, the total alkali charge ( as NaOH) of two stages oxygen delignification should not be higher than 5.0%.关键词
两段氧脱木素/竹浆粕/目标脱木素率/黏度下降率/α-纤维素/聚戊糖Key words
two stages oxygen delignification/ bamboo dissolving pulp/ target delignification rate/ viscosity reduction rate/ a-cellulose content/ pentosan content分类
轻工纺织引用本文复制引用
陈秋艳,罗小林,曹石林,陈礼辉,马晓娟,黄六莲..硫酸盐竹浆两段氧脱木素目标脱木素率的确定[J].中国造纸学报,2012,27(4):1-5,5.
