摘要
研究了杨木CTMP碱性H2O2漂白过程中漂白工艺对糖醛酸溶出的影响。结果表明,糖醛酸的溶出主要受体系碱度的影响。高碱度下,H2O2的加入会在一定程度上阻碍糖醛酸的溶出;高温(如高于80℃)会加剧糖醛酸的溶出;一定温度下,糖醛酸的溶出主要在反应初期阶段较快速。正交实验结果表明,影响糖醛酸溶出的漂白工艺条件依次为NaOH用量、温度、H2O2用量、浆浓、反应时间。
Some dissolved and colloidal substances（DCS） tend to release during the alkline hydrogen peroxide bleaching of mechanical pulp,and the anionic groups（AGs） in DCS are mainly uronic acids.In this paper,the aspen CTMP were bleached with alkaline hydrogen peroxide under different conditions,and the content of uronic acids in the resultant DCS was determined by spectrophotometric method.The results showed that the amount of uronic acids dissolved was mainly affected by the alkalinity of the system;Peroxide could obstruct the release of the uronic acids under high alkalinity.High reaction temperature（e.g.above 80℃） could result in a significant increase of the content of uronic acids.The results of orthogonal experiments indicated that factors affecting the uronic acids relasase were the dosage of NaOH,temperature,dosage of H2O2,consistency of pulp and reaction time in order.
出处
《中国造纸》
CAS
北大核心
2011年第6期6-10,共5页
China Pulp & Paper
基金
国家自然科学基金(30972327)
国家教育部新世纪人才支持计划(NCET-08-0882)项目
