Bleaching study of kenaf mechanical pulps

被引：0
|
作者：
Mohta, DC
Roy, DN
Whiting, P
机构：
[1] Univ Toronto, Fac Forestry, Toronto, ON M5S 3B3, Canada
[2] Trojan Technol Inc, London, ON N5V 4T7, Canada
来源：
TAPPI JOURNAL | 2003年 / 2卷 / 08期
关键词：
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：
Optimization studies of hydrogen peroxide bleaching were carried out on two kinds of kenaf mechanical pulps. One was composed of whole kenaf with 65% core fiber ("kenaf"), and the other was made up of kenaf bark with 22% core fibers ("bark-22"). The kenaf and bark-22 pulps reached brightnesses of 62.0% and 64.0%, respectively, with only 1.0% H2O2 and 1.0% NaOH. With <LF>higher H2O2 and NaOH dosages, both pulps can be bleached to 75.0% ISO brightness. Results showed that peroxide consumption is higher for whole kenaf than for bark-22, probably because core fibers are higher in extractiveness and lignin. For each combination of H2O2 and NaOH dosages tested, the bleaching efficiency was better for bark-22 than for kenaf.
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页码：29 / 32
页数：4
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