THE PEROXYSILICATE QUESTION - SI-29-NMR EVIDENCE FOR THE ROLE OF SILICATES IN ALKALINE PEROXIDE BRIGHTENING OF MECHANICAL PULP

被引：9

作者：

KINRADE, SD

HOLAH, DG

HILL, GS

MENUZ, KE

SMITH, CR

机构：

[1] Department of Chemistry, Lakehead University, Thunder Bay, Ontario

来源：

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY | 1995年 / 15卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1080/02773819508009508

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：

The influence of hydrogen peroxide on the chemistry of aqueous silicates was investigated by high-resolution Si-29-NMR and electrochemical methods. The observations indicate that dissolved silicates form labile complexes with radical H2O2-decomposition products, possibly O2.-. An important role of soluble silicates in peroxide bleaching liquors thus might be to affect the activity of free radical species which mediate H2O2 bleaching and decomposition reactions. Attempts to prepare the widely reported peroxysilicates form silicate/H2O2/NaOH mixtures resulted in the isolation of Na2O2.8H2O.

引用

页码：203 / 222

页数：20

共 37 条

[1]

ABBOT J, 1991, J PULP PAP SCI, V17, pJ10

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