Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (1): 24-29.

• Chemistry,Chemical & Energy Engineering • Previous Articles     Next Articles

Pressured Hydrogen Peroxide Bleaching of Bagasse Pulp

Zeng Jian1,2  Chen Ke-fu1  Xu Guang2  Li Jun1  Xu Jun1  Yang Fei1   

  1. 1.State Key Laboratory of Pulp and Paper Engineering//Guangdong Public Laboratory of Paper Technology and
    Equipment,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Technology Center,China Tobacco Guangdong Industrial Co. ,Ltd. ,Guangzhou 510145,Guangdong,China
  • Received:2011-08-23 Revised:2011-10-24 Online:2012-01-25 Published:2011-12-01
  • Contact: 曾健(1979-) ，男，博士后，主要从事中高浓清洁制浆漂白技术研究． E-mail:zeng.jian@ mail.scut.edu.cn
  • About author:曾健(1979-) ，男，博士后，主要从事中高浓清洁制浆漂白技术研究．
  • Supported by:

    国家“973”计划项目( 2010CB732205) ; 教育部高等学校博士学科点专项科研基金资助项目( 20100172110020)

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Abstract:

Two shot bleaching sequences,namely QP ( chelating pretreatment and hydrogen peroxide bleaching) and P0( pressured hydrogen peroxide bleaching) ,were performed for Soda-AQ bagasse pulp,and the possibility of single-stage P0 for bagasse pulp was discussed. Then,orthogonal tests were carried out and the optimal P0 conditions
were determined,that is,a temperature of 100℃,a duration of 80min,an oxygen pressure of 0. 6MPa and a NaOH dosage of 0. 4%. It is found that the viscosity of the P0-bleached pulp reaches 825. 3mL /g and the brightness
is up to 84. 0%ISO,which is 9. 9%ISO higher than that of the pulp with QP sequence,and that the P0-bleached
pulp is a kind of high-strength pulp with a tensile index of 66. 67N·m/g,a tear index of 9. 34mN·m2 /g, a burst index of 4. 31 kPa·m2 /g and a folding endurance of 39 times. Moreover,it is indicated that P0 helps to greatly reduce the pollution discharge because P0 effluent can be totally countercurrent reused in the bleaching stage due to its low chemical oxygen demand,biochemical oxygen demand and chroma.

Key words: bagasse pulp, chelating pretreatment, pressured hydrogen peroxide bleaching, orthogonal test

CLC Number: