Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (11): 33-40.doi: 10.3969/j.issn.1000-565X.2016.11.006

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Investigation into Response Surface Methodology for Oxalate Formation During Oxygen Delignification

LI Hai-long LIU Ying-ying LIU Meng-ru   

  1. State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-01-18 Revised:2016-02-24 Online:2016-11-25 Published:2016-10-04
  • Contact: 李海龙( 1979-) ，男，博士，副教授，主要从事制浆化学与生物技术研究 E-mail:felhl@scut.edu.cn
  • About author:李海龙( 1979-) ，男，博士，副教授，主要从事制浆化学与生物技术研究
  • Supported by:
    Supported by the National Natural Science Foundation of China( 31370585) and the Science and Technology Planning Project of Guangdong Province，China( 2015A020215007)

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Abstract:

The oxalate formation of the kraft pulp with different influence factors ( namely time,temperature,oxygen pressure and alkali charge ( NaOH mass fraction) during an oxygen delignification process was investigated by single-factor experiments.On this basis,the Box-Benhnken experiment of the response surface methodology was conducted to optimize the main factors influencing oxygen delignification.The results show that,under the condition of 0.2% MgSO4 and 10% pulp consistency,optimal oxalate formation conditions during the oxygen delignification are a temperature of 100℃,an alkali charge of 1.5%,a reaction time of 60 min and an oxygen pressure of 0.5MPa.Under the optimal conditions,the oxalate content is 0.25 g /L and the ratio of the Kappa number difference to the viscosity difference is 0.045.

Key words: kraft pulp, oxalate, oxygen delignification, response surface methodology