改善KP浆二氧化氯漂白性能的研究 第一部分:己烯糖醛酸基对卡伯值的贡献  

The Contribution of Hexenuronic Acid Groups of Xylan to Kappa Number of the Pulp

作　　者：刘加奎[1] 黄干强[1] 张曾[1] 伍红[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广州510641

出　　处：《中国造纸》2000年第3期44-47,共4页China Pulp & Paper

基　　金：广东省自然科学基金 ;教育部留学回国人员基金;芬兰奥斯龙机械公司资助

摘　　要：木材中木聚糖的侧基 4 O 甲基 D 葡萄糖醛酸在碱法蒸煮中主要转化为己烯糖醛酸侧基 (Hexenuronicacid ,简写为HuA)。不同原料、不同蒸煮程度的碱法纸浆中HuA的含量不尽相同。在测定卡伯值时HuA会消耗一定数量的高锰酸钾 ,因此HuA的存在对卡伯值有贡献。该文利用UV光谱对HuA的含量进行了测定。The kappa number of chemical pulp is widely used as a measure of the degree of delignification in pulping,oxygen delignification and prebleaching. It has been shown that the kappa number reflects not only lignin content but also the amount of hexenuronic acid groups linked to xylan. It was found that the E.urophylla kraft pulps contained about 50～60μmol/g hexenuronic acid groups in our work and demonstrated that 10μmol/g of hexenuronic acid correspond to 1 kappa unit. It is possible to calculate the amount of hexenuronic acid groups in pulp by determining the kappa number before and after acid hydrolysis.

关 键 词：木聚糖 已烯糖醛酸基 卡伯值 硫酸盐纸浆 漂白 

分 类 号：TS745[轻工技术与工程—制浆造纸工程] TS743.1