Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (1): 105-111.doi: 10.3969/j.issn.1000-565X.2013.01.017

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Optimization of Process Parameters for Chlorine Dioxide Bleaching ofOxygen-Delignified Bagasse Pulp

Li Jun Xu Gang Xu Jun Mo Li-huan   

  1. State Key Laboratory of Pulp and Paper Engineering//United Laboratory of Plant Resources Chemistry and ChemicalEngineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2012-06-29 Revised:2012-08-30 Online:2013-01-25 Published:2012-12-03
  • Contact: 徐峻(1979-),男,博士,讲师,主要从事纸浆清洁生产技术与植物资源利用研究. E-mail:xujun@scut.edu.cn
  • About author:李军(1972-),男,博士,教授,主要从事纸浆清洁漂白生产技术与装备研究.E-mail:ppjunli@scut.edu.cn
  • Supported by:

    国家"973"计划项目(2010CB732205);制浆造纸工程国家重点实验室青年创新基金资助项目(x2qsC7100640)

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Abstract:

Three-factor quadratic general rotary experiment design was made to optimize three main process parame-ters of the chlorine dioxide bleaching of oxygen-delignified bagasse pulp, namely, the ClO2 dosage, the NaOH do-sage and the bleaching time. Besides, a quadratic polynomial nonlinear regression model describing the relationshipsbetween the process parameters and the Kappa number, the brightness as well as the absorbable organic halide(AOX) content was constructed. The results show that the constructed regression model passes the significance testand fits well, that the three parameters affect the Kappa number, the brightness and the AOX content in a order of ClO2 dosage>bleaching time>NaOH dosage, and that, in the optimal conditions, namely a ClO2 dosage of 0.79%,a NaOH dosage of 0.43% and a bleaching time of 53min, the predicated Kappa number, brightness and AOX con-tent respectively reach 1.83, 73.3% ISO and 10.8 mg/ L, which are close to the experimental values of 1.76,75.0%ISO and 11.3mg/ L.

Key words: bagasse pulp, chlorine dioxide bleaching, process optimization, Kappa number, brightness, absorba-ble organic halide