Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (11): 86-90.doi: 10.3969/j.issn.1000-565X.2010.11.016

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Kraft Pulping of Hibiscus cannabines and ECF Bleaching of the Pulp

Wang Qiang 1.2  Chen Ke-fu 1.2  Xu Jun 1.2  Li Jun 1.2  Tang Jie-bin 1.2  Wu Hui-min 1.2  Liu Shan-shan 3   

  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;3.Institute of Chemical Industry of Forest Products,Chinese Academy of Forestry,Nanjing 210042,Jiangsu,China
  • Received:2010-03-10 Revised:2010-05-10 Online:2010-11-25 Published:2010-11-25
  • Contact: 王强（1983-），男，博士，主要从事制浆造纸清洁生产与污染控制的研究． E-mail:wangqiang8303@163．com
  • About author:王强（1983-），男，博士，主要从事制浆造纸清洁生产与污染控制的研究．
  • Supported by:

    国家自然科学基金-工程科技发展战略研究联合基金资助项目（U0970164）; 华南理工大学制浆造纸工程国家重点实验室自主创新项目（2007ZD01）

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Abstract:

By using Hibiscus cannabines as the raw material,this paper analyzes the chemical component of the material,investigates the optimal kraft pulping（KP） conditions at different H factor,and discusses the element chlorine-free（ECF） bleaching of the KP pulp and corresponding bleaching process.It is found that Hibiscus cannabines is a good material for paper making,with the chemical composition as follows： 45.0% of nitrate-ethanol cellulose,16.5% of Klason lignin,pentosan and low content of extraction.Moreover,the results indicate that,in the optimal pulping conditions,namely,a H-factor of 1 000,an active alkali dosage of 20% and a sulphidity of 22%,screened pulp with a yield of 44.9%,a Kappa number of 20.4 and a residual alkali content of 11.67 g/L can be obtained,and that ECF bleaching sequence（ODED） can produce pulp with a brightness of 82.3%ISO when OD0,2%-EpD1,1.5% process is employed.

Key words: Hibiscus cannabines, chemical component, kraft pulping, yield, element chlorine-free bleaching