论文部分内容阅读
ClO2是漂白硫酸盐浆时常用的漂白剂。研究表明,在传统的ECF漂白过程中,50%以上的ClO2并没有参与漂白过程,而是用于木素氧化产物——己二烯二酸衍生物的氧化。通过降低D0段的卡伯因子或者很大程度上去除己二烯二酸衍生物,可尽可能降低ClO2的过度消耗。将ClO2应用于硫酸盐针叶木浆的ECF漂白中,可节约30%的ClO2用量,但该种方法需加入较多的NaOH,同时还要额外增加2个漂白塔。
ClO2 is a commonly used bleach for bleaching kraft pulp. Studies have shown that more than 50% of ClO2 is not involved in the bleaching process in traditional ECF bleaching processes, but rather is used for the oxidation of the lignin oxidation product, the maleic acid derivative. By reducing the D0 Kappa factor or largely removing the maleic acid derivative, it is possible to minimize the excessive consumption of ClO2. The use of ClO2 in ECF bleaching of kraft pulp can save 30% of the amount of ClO2, but this method requires adding more NaOH while adding an extra 2 bleaching towers.