Partition of soluble and precipitated oxalate and its implication on decreasing oxalate-related scaling during peroxide bleaching of mechanical pulps

被引：0

作者：

Yu, L. ^{[1
]}

Ni, Y. ^{[1
]}

机构：

[1] Univ New Brunswick, Limerick Pulp & Paper Ctr, Fredericton, NB, Canada

来源：

PULP & PAPER-CANADA | 2007年 / 108卷 / 01期

关键词：

oxalates; scaling; peroxide bleaching; mechanical pulps; precipitates; process variables;

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

We determined the effect of various process parameters (hydrogen peroxide charge, caustic soda charge, and bleaching consistency) on the partition between soluble and precipitated oxalate. At a higher peroxide charge or caustic soda charge, more oxalate is in the soluble form. Decreasing the pulp consistency can increase the fraction of soluble oxalate. Also, a partial replacement of NaOH with Mg(OH)(2) as the alkali source during peroxide bleaching can increase the amount of soluble oxalate, thus effectively decreasing oxalate-related scaling.

引用

页码：39 / 43

页数：5