ALKALI DARKENING AND ITS RELATIONSHIP TO PEROXIDE BLEACHING OF MECHANICAL PULP

编号 zgly0000332854

文献类型 期刊论文

文献题名 ALKALI DARKENING AND ITS RELATIONSHIP TO PEROXIDE BLEACHING OF MECHANICAL PULP

学科分类 220.5570;林产化学加工学

作者 ZhibinHe  Yon2haoNi  EricZhang_ 

作者单位 LimerickPulpandPaperCentre 

母体文献 天津科技大学学报 

年卷期 2004,19(A01)

页码 17-22

年份 2004 

分类号 TS745 

关键词 碱性处理  暗色化  过氧化物漂白  机械制浆  PH值  过渡金属 

文摘内容 The effect of alkalinity, transition metals and oxygen on alkali darkening of mechanical pulp, and its relations to subsequent peroxide bleaching were investigated. The chromophores generated under mild conditions of an alkaline treatment can be destroyed in a subsequent peroxide stage. Peroxide-resistant chromophores are generated only under severe conditions. The results also show that a short alkaline pretreatment can improve the performance of a peroxide bleaching stage。