碱抽提强化的麦草浆ClO_2漂白及ECF漂白流程  

Chlorine Dioxide Bleaching Reinforced by Alkaline Extraction and Corresponding ECF Bleaching Sequences for Wheat Straw Pulp

作　　者：赵德清[1,2] 陈克复[1] 莫立焕[1] 李军[1] 徐峻[1] 杨仁党[1] 杨飞[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]大连工业大学化工与材料学院,辽宁大连116034

出　　处：《华南理工大学学报（自然科学版）》2010年第8期45-50,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家科技支撑计划项目(2006BA032B06-2)

摘　　要：采用常规碱抽提（E）、氧加强的碱抽提（E0）、H2O2强化的碱抽提（Ep）、氧和H2O2强化的碱抽提（EoP）对ClO2脱木素（D0）麦草浆进行改性，考查不同碱抽提方式的改性效果在后续漂段（D1）的体现，并就不同无元素氯（ECF）漂白流程（D0ED1、D0P、D0A／QP、D0EP、D0E，D1、D0E，P）进行对比．结果表明：不同碱抽提方式对D0浆木素的改性效果不同，就对后续漂段D1的影响而言，4种不同碱抽提方式下纸浆的可漂性顺序为D0E0p〉D0Ep〉D0E0〉D0E；在4种碱抽提方式所对应的DOEDl漂白流程中，D1段ClO2用量的增加对白度的提升是有限的，以0．8％-1．0％为佳；D0EpD1和D0EpP流程漂白效果优于其它流程，采用D0EpD1和D0EpP流程漂后白度可分别达到82．3％ISO和83．8％ISO，均适用于麦草浆短序ECF漂白．Four kinds of alkaline extraction approaches, including the conventional, the oxygen-reinforced, the H2O2-reinforced and the oxygen-and-H2O2-reinforced ones （E, E0, Ep and E0p） , were used to modify ClO2-delignified （D0） wheat straw pulp, and the modification effects of these four approaches on the subsequent bleaching stage （D1） were explored. In addition, various elemental chlorine-free （ECF） bleaching sequences, such as D0ED1, D0P, DoA/QP, D0EP, D0EpD1 and D0EpP, were comparatively investigated. The results indicate that （ 1 ） the modification effects of different alkaline extraction approaches on the residual lignin of Do stage are different from one other; （2） for the subsequent D1 stage, the bleachability of D1 pulp varies in an order of D0E0P 〉 D0Ep 〉 D0E0 〉 D0E; （3） in the D0ED1 bleaching sequences, the increase of ClO2 dosage in D1 stage results in the brightness enhancement in a certain degree, especially at an optimized ClO2 dosage of 0. 8% -1.0% ; （4） as compared with the other sequences, D0EpD1 and D0EpP sequences are both of better bleaching effect; and （5） with D0EpD1 and DoEpP bleaching sequences, the final brightness of bleached wheat straw pulp reaches 82.3% ISO and 83.8% ISO, respectively, which means that both D0EpD1 and DoEpP sequences are applicable to the ECF short-sequence bleaching of wheat straw pulp.

关 键 词：碱抽提 麦草浆 二氧化氯漂白 ECF漂白 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]