SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (5): 577-584.DOI: 10.1016/S1004-9541(13)60524-8

• 材料与产品工程 • 上一篇    

Recycling and Reuse of Ionic Liquid in Homogeneous Cellulose Acetylation

黄科林1,2, 吴睿2, 曹妍3, 李会泉3, 王金淑1   

  1. 1 School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;
    2 Guangxi Branch of China Academy of Science and Technology Development, Nanning 530022, China;
    3 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2012-03-07 修回日期:2012-09-15 出版日期:2013-05-28 发布日期:2013-05-31
  • 通讯作者: LI Huiquan
  • 基金资助:

    Supported by the Major Project of the State Key Development Program for Basic Research of China (2009CB219901) and the National Natural Science Foundation of China (21006118).

Recycling and Reuse of Ionic Liquid in Homogeneous Cellulose Acetylation

HUANG Kelin1,2, WU Rui2, CAO Yan3, LI Huiquan3, WANG Jinshu1   

  1. 1 School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;
    2 Guangxi Branch of China Academy of Science and Technology Development, Nanning 530022, China;
    3 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2012-03-07 Revised:2012-09-15 Online:2013-05-28 Published:2013-05-31
  • Supported by:

    Supported by the Major Project of the State Key Development Program for Basic Research of China (2009CB219901) and the National Natural Science Foundation of China (21006118).

摘要: Molecular distillation was used to recover ionic liquid (IL) 1-allyl-3-methylimidazolium chloride (AmimCl) in homogeneous cellulose acetylation. The five factors that affect the separation efficiency of molecular distillation, namely, feed flow rate, distillation temperature, feed temperature, wiper rotating speed, and distillation pressure, are discussed. The optimal recovery condition was determined via orthogonal experiments using an OA9(34) design. The IL was recycled and reused 5 times in the homogeneous cellulose acetylation system under optimal conditions. The purity of recycled IL the 5th time reached 99.56%. FT-IR (Fourier transform infrared spectroscopy) and 1H NMR (nuclear magnetic resonance) spectroscopy showed that the structure of the recovered IL is not changed. This work proves that AmimCl has excellent reusability, and that molecular distillation is an effective method for recovering IL in homogeneous cellulose acetylation.

关键词: cellulose, ionic liquid, molecular distillation, recycling

Abstract: Molecular distillation was used to recover ionic liquid (IL) 1-allyl-3-methylimidazolium chloride (AmimCl) in homogeneous cellulose acetylation. The five factors that affect the separation efficiency of molecular distillation, namely, feed flow rate, distillation temperature, feed temperature, wiper rotating speed, and distillation pressure, are discussed. The optimal recovery condition was determined via orthogonal experiments using an OA9(34) design. The IL was recycled and reused 5 times in the homogeneous cellulose acetylation system under optimal conditions. The purity of recycled IL the 5th time reached 99.56%. FT-IR (Fourier transform infrared spectroscopy) and 1H NMR (nuclear magnetic resonance) spectroscopy showed that the structure of the recovered IL is not changed. This work proves that AmimCl has excellent reusability, and that molecular distillation is an effective method for recovering IL in homogeneous cellulose acetylation.

Key words: cellulose, ionic liquid, molecular distillation, recycling