Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (9): 38-41,68.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Oxalate Formation Rules During Oxygen Delignification of Kraft Pulp

Li Hai-long1  Zhan Huai-yu1  Chai Xin-sheng1  Liu Meng-ru1  Fu Shi-yu1   

  1. 1. State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Industrial Technology Research Institute,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-03-26 Revised:2012-05-23 Online:2012-09-25 Published:2012-08-01
  • Contact: 李海龙(1979-) ，男，博士，讲师，主要从事制浆化学与生物化学研究． E-mail:lihailong1979@ gmail.com
  • About author:李海龙(1979-) ，男，博士，讲师，主要从事制浆化学与生物化学研究．
  • Supported by:

    国家自然科学基金资助项目( 31100438， 21006034) ; 华南理工大学中央高校基本科研业务费专项资金资助项目( 2011ZM0096) ; 制浆造纸工程国家重点实验室开放基金资助项目( 201154) ; 中国博士后科学基金资助项目( 20110490890)

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Abstract:

In this paper,the effects of the oxygen delignification of southern pine Kraft pulp on the oxalate formation were investigated,and the relationship between the oxalate formation and the Kappa number was also discussed. Then,according to this relationship,a mathematical model was constructed to predict the oxalate content during the oxygen delignification. The results show that the oxalate content gradually increases during the oxygen delignification and increases with the temperature and the alkali dosage,while the oxalate formation is not affected by the oxygen pressure,and that,for the proposed model,the linear correlation coefficient between the predicted value and the measured one is 0. 969,which means that the prediction accuracy is higher,so it can be used to predict the oxalate content in the oxygen delignification effluent of a given pulp.

Key words: Kraft pulp, oxalate, oxygen delignification, prediction model