EFFICIENT DEPOLYMERIZATION METHODS OF POLYAMIDES IN SUPERCRITICAL ALCOHOLS AND IONIC LIQUIDS
Development of a new efficient method for the depolymerization of plastics is of interest for utilizing chemical recycling of waste plastics. In this presentation, we are going to show our recent results for the depolymerization of polyamides, especially for nylon-6, by using supercritical lower alcohols and ionic liquids. Use of supercritical secondary or tertiary alcohols resulted in the clean depolymerization to give caprolactam in good yields. The obtained caprolactam was usually highly pure. Use of ionic liquids provides another successful method for the depolymerization of nylon-6, in which caprolactam are usually isolated in very pure form and the ionic liquids are repeatedly useful for the reaction. This method is the first use of ionic liquids for this purpose and has opened a new perspective in not only plastic recycling chemistry but also ionic liquids chemistry. Both of the new methods provide useful methodologies for the chemical recycling of polyamides.
Akio Kamimura Kouji Kaiso Shigehiro Yamamoto Tsunemi Shugimoto Kohichi Kashiwagi
Department Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube 755- Department Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube 755- Ube Laboratory, Ube Industries Ltd., Ube 755-8633,Japan
国际会议
成都
英文
233-237
2009-10-11（万方平台首次上网日期，不代表论文的发表时间）