华南理工大学学报(自然科学版) ›› 2010, Vol. 38 ›› Issue (8): 45-50.doi: 10.3969/j.issn.1000-565X.2010.08.009

• 化学化工 • 上一篇    下一篇

碱抽提强化的麦草浆ClO2漂白及ECF漂白流程

赵德清1,2  陈克复莫立焕1  李军1  徐峻1  杨仁党1  杨飞1   

  1. 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
  • 收稿日期:2009-08-11 修回日期:2009-10-26 出版日期:2010-08-25 发布日期:2010-08-25
  • 通信作者: 赵德清(1975-),男,博士生,主要从事制浆清洁生产与污染控制研究. E-mail:paperzdq@126.com
  • 作者简介:赵德清(1975-),男,博士生,主要从事制浆清洁生产与污染控制研究.
  • 基金资助:

    国家科技支撑计划项目(2006BA032806-2)

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

Zhao De-qing 1.2  Chen Ke-fu1  Mo Li-huan1  Li Jun1  Xu Jun1  Yang Ren-dang1  Yang Fei1   

  1. 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. School of Chemistry Engineering and Material, Dalian Polytechnic University, Dalian 116034, Liaoning, China
  • Received:2009-08-11 Revised:2009-10-26 Online:2010-08-25 Published:2010-08-25
  • Contact: 赵德清(1975-),男,博士生,主要从事制浆清洁生产与污染控制研究. E-mail:paperzdq@126.com
  • About author:赵德清(1975-),男,博士生,主要从事制浆清洁生产与污染控制研究.
  • Supported by:

    国家科技支撑计划项目(2006BA032806-2)

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.

关键词: 碱抽提, 麦草浆, 二氧化氯漂白, ECF漂白

Abstract:

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.

Key words: alkaline extraction, wheat straw pulp, chlorine dioxide bleaching, ECF bleaching