Novel Extractants with High Selectivity for Valuable Metals in Seawater

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  • KAKOI Takahiko
    Department of Chemical Science and Technology, Faculty of Engineering, Kyushu University
  • GOTO Masahiro
    Department of Chemical Science and Technology, Faculty of Engineering, Kyushu University

Bibliographic Information

Other Title
  • 海水中の有価金属を高度に認識する抽出試薬
  • 海水中の有価金属を高度に認識する抽出試薬--カリックスアレーン化合物
  • カイスイチュウ ノ ユウカ キンゾク オ コウド ニ ニンシキスル チュウシュ
  • Calixarene Derivatives
  • カリックスアレーン化合物

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Abstract

Seawater contains various valuable metals such as uranium and lithium. Therefore, attempts are being made to develop highly selective extractants which recognize target metal ions in reclaimed seawater. In this review, we have focused our study on the application of novel cyclic compound calixarene based extractants. A novel host compound calixarene, which is a cyclic compound connecting some phenol rings, is capable of forming several different extractant ring sizes and introducing various kinds of functional groups towards targeting of metal ions in seawater. Therefore, calixarene derivatives are capable of extracting valuable metals such as uranium, alkaline metals, heavy metals, rare earth metals and noble metals selectively by varying structural ring size and functional groups. The novel host compound calixarene has given promising results which line it up as a potential extractant for the separation of valuable metal ions in seawater.

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