贝克曼值在低木质素纸浆硬度检测中的应用

Application of Bjorkman Number on Hardness Detection for Low⁃lignin⁃content Pulps

本研究比较了纸浆卡伯值、高锰酸钾值、贝克曼值的测试方法的共同点和差异点,分析了使用贝克曼值监测低木质素纸浆硬度的优势,介绍了针对低木质素纸浆某企业贝克曼值测试方法的技术调整,并从反应液的浓度、酸度、固液比、反应时间以及方法的重复性论证了优化方法的可行性。连续10批的未漂马尼拉麻检测数据显示,高锰酸值为3.5~4.2,极差0.7,贝克曼值为23.4~28.2,极差4.8,贝克曼值具有更优的灵敏度。

This study compared the common points and differences in determination parameters between Kappa number,Permanganate num‐ber and Bjorkman number,analysed the advantages of Bjorkman number application on hardness monitoring for low-lignin-content pulps,and introduced the improvements in determination parameters of the company of Bjorkman number for the low-lignin-content pulps.The fea‐sibility of the optimisation scheme was presented in terms of concentration and acidity of the solution,solid-liquid ratio of sample to reagent,reaction time and method repeatability.The 10-batch unbleached manila hemp detection data showed that the Permangate number was be‐tween 3.5 and 4.2,with a fluctuation range of 0.7.The Bjorkman number was between 23.4 and 28.2,with a range of 4.8 which showed the Bjorkman number had better sensitivitj for low lignin content pulps.