Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Extraction of Alkali Metal Cation with Crown Ethers and HDEHP

Crown Ether와 HDEHP에 의한 알칼리금속이온의 추출

  • Ihn Chong Lee (Department of Chemistry, Hallym College) ;
  • Si Joong Kim (Department of Chemistry, Korea University) ;
  • Chul Lee (Department of Chemistry, Hanyang University)
  • 이인종 (한림대학교 자연과학부 화학과) ;
  • 김시중 (고려대학교 이과대학 화학과) ;
  • 이철 (한양대학교 자연과학대학 화학과)
  • Published : 1986.08.20
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Abstract

Solvent extraction equilibria of alkali metal cation with crown ether (DC18C6, DC24C8) and HDEHP have been studied. The extraction equilibrium constants increase in the order of, in the DC18C6 system, $Na^+, and in the DC24C8 system, $Rb^+. The species extracted to organic phase are $M_1(crown ether)_1\;(HDEHP)_1$. The magnitude of extraction equilibrium constant is determined by the distribution ratio of crown ether between organic and aqueous phase, and stability constant of crown ether-alkali metal complex.

Crown ether (DC18C6, DC24C8)과 HDEHP로 알칼리 금속 이온을 용매 추출할 때의 추출평형을 연구하였다. 추출평형상수는 DC18C6계에서 $Na^+순으로 증가하였으며 DC24C8계에서는 $Rb^+순으로 증가하였다. 유기용매상으로 추출되는 추출종은 $M_1(crown ether)_1\;(HDEHP)_1$이며 추출평형상수의 크기는 crown ether의 유기용매상과 수용액상에서의 분배비와 crown ether-알칼리금속 착물의 안정도 상수에 의해서 결정된다.

Keywords

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