Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (2): 28-31，66.doi: 10.3969/j.issn.1000-565X.2010.02.006

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Totally-Chlorine-Free Bleaching of Bagasse Pulp

Liu Yan-lan 1.2  Chen Ke-fu 1.2  Li Jun 1.2  Xu Jun 1.2  Wang Zhao-jiang 1.2  Li Wei-wei 1.2   

  1. 1 State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Guangdong Public Laboratory of Paper Technology and Equipment, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-03-19 Revised:2009-04-25 Online:2010-02-25 Published:2010-02-25
  • Contact: 刘艳兰（1981-），女，博士生，主要从事纸浆清洁生产研究． E-mail:liuyanlan0305@163．com
  • About author:刘艳兰（1981-），女，博士生，主要从事纸浆清洁生产研究．
  • Supported by:

    十一五”国家科技支撑计划重点项目（B11B108009）

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Abstract:

A short bleaching sequence for bagasse pulp, which includes the oxygen delignification enhanced with hydrogen peroxide（ OP ）, the chelating pretreatment （Q） and the hydrogen peroxide bleaching with pressure （PO）,was investigated. The possibility of obtaining bleached pulp with a brightness of 82% ISO and substituting sodium silicate with non-silica stabilizer in the hydrogen peroxide bleaching was explored. The results indicate that （ 1 ） non-silica stabilizers PP-1 and PP-2 are both suitable for hydrogen peroxide bleaching owing to their resistance to high temperature and pressure ; （2） with a sodium hydroxide dosage of 2. 0% （ relative to oven dry pulp, the same below） and a hydrogen peroxide dosage of O. 5% in Op section, and with a hydrogen peroxide dosage of 3.0%, a PP-1 dosage of 0. 1% and a PP-2 dosage of 0. 5% in Po section, the bleached pulp is of a brightness of 85% ISO;and （3） as no adsorbable organic halogens are found in the OPQPO process, the bleaching effluent can be successfully degraded by organisms.

Key words: bagasse pulp, hydrogen peroxide bleaching, stabilizer