文献类型：期刊文献

中文题名：机械浆H2O2漂白中MgSO4、DTPA和Na2SiO3的作用

英文题名：Roles of Magnesium Sulfate,DTPA and Silicate in Hydrogen Peroxide Bleaching of Chemimechanical Pulps

作者：沈葵忠[1] 房桂干[1] 储富祥[2] 焦健[1] 李萍[1]

第一作者：沈葵忠

通信作者：Shen, K.-Z.

机构：[1]中国林业科学研究院林产化学工业研究所,江苏南京210042;[2]中国林业科学研究院,北京100091

年份：2008

卷号：27

期号：7

起止页码：6-10

中文期刊名：中国造纸

外文期刊名：China Pulp & Paper

收录：CSTPCD;;EI(收录号：20083411474725);Scopus(收录号：2-s2.0-49549099022);北大核心:【北大核心2004】；

基金：“十一五”国家科技支撑计划专题(2006BAD18B0502)项目

语种：中文

中文关键词：机械制浆;H2O2漂白;MgSO4;DTPA;Na2SiO3

外文关键词：hydrogen peroxide; hydrogen peroxide bleaching; mechinaical pulp bleaching; magnesium sulphate; DTPA; silicate

分类号：TS745

摘要：从防止H_2O_2分解角度对MgSO_4、DTPA和Na_2SiO_3的适宜用量进行了探讨,对3种漂白助剂在机械浆H_2O_2漂白中的作用进行了比较,同时对DTPA预处理对H_2O_2漂白的效果进行了评价。在含有过渡金属离子的碱性H_2O_2溶液中,3种助剂适宜用量分别为:MgSO_4为0.05%～0.1%,DTPA为0.1%～0.5%,Na_2SiO_3为0.5%～3.0%。Na_2SiO_3的使用效果明显好于DTPA。两段H_2O_2漂白的正交实验表明,在影响机械浆H_2O_2漂白的3种助剂中,Na_2SiO_3是最显著的影响因素,其次是DTPA。对机械浆进行DTPA预处理可以改善H_2O_2漂白效果,增加残余H_2O_2和降低浆料的返黄值。DTPA预处理的适宜用量为0.3%～0.5%。
The suitable usage amounts of magnesium sulfate, DTPA and silicate considering the H2O2 degradation performances in hydrogen peroxide bleaching of mechanical pulps were discussed. The optimal amounts of magnesium sulfate, DTPA and silicate are 0.05%0.1%, 0.1%, 0.5% and 0.5%, 3.0%,respectively. Effects of DTPA and silicate on CMP brightness bleached by one-stage hydrogen peroxide bleaching were compared under different NaOH usage levels. It was showed that silicate plays a more important role than DTPA in improving the CMP brightness. Two-stage hydrogen peroxide bleaching of poplar CMP by using the orthogonal experimental design was also conducted to evaluate the roles of magnesium sulfate, DTPA and silicate in hydrogen peroxide bleaching. Silicate is the most important factor among the three bleaching additives agents, and magnesium sulfate is less important in improving bleaching efficiency than that we originally expected. The addition DTPA in the DTPA pretreatment can obtain better effects on hydrogen peroxide bleaching than that in the bleaching stage. The enough usage amount of DTPA in the DTPA pretreatment stage is less than 0.3 %-0.5 %.