THE ROLE OF BOUND CHLORINE IN THE BRIGHTNESS REVERSION OF BLEACHED HARDWOOD KRAFT PULP

被引：8
|
作者：
Morais Eiras, Katia Maria [1 ]
Colodette, Jorge Luiz [2 ]
Silva, Vanessa Lopes [2 ]
机构：
[1] Suzano Celulose & Papel, BR-45930000 Mucuri, BA, Brazil
[2] Univ Fed Vicosa, Dept Engn Florestal, BR-36570000 Vicosa, MG, Brazil
来源：
QUIMICA NOVA | 2009年 / 32卷 / 01期
关键词：
eucalyptus; OX; brightness reversion; DIOXIDE; MECHANISM; KINETICS;
D O I：
10.1590/S0100-40422009000100010
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Our previous paper showed fragmentary evidence that pulp brightness reversion may be negatively affected by its organically bound chlorine (OX) content. A thorough investigation on eucalyptus kraft pulp led to the conclusion that OX increases reversion of certain pulps but this trend is not universal. Alkaline bleaching stages decrease reversion regardless of pulp OX content. Pulps bleached with high temperature chlorine dioxide revert less than those bleached with conventional chlorine dioxide in sequences ending with a chlorine dioxide stage but similarly in sequences ending with a final peroxide stage. The use of secondary condensate for pulp washing decreases reversion.
引用
收藏
页码：51 / 55
页数：5
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