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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 30, Number 4
JKCSEZ 30(4)
August 20, 1986 

Extraction of Alkali Metal Cation with Crown Ethers and HDEHP

Crown Ether와 HDEHP에 의한 알칼리금속이온의 추출
Ihn Chong Lee, Si Joong Kim, Chul Lee

이인종, 김시중, 이철
Crown ether (DC18C6, DC24C8)과 HDEHP로 알칼리 금속 이온을 용매 추출할 때의 추출평형을 연구하였다. 추출평형상수는 DC18C6계에서 Na+ < Cs+ < Rb+ < K+순으로 증가하였으며 DC24C8계에서는 Rb+ < K+ < Cs+순으로 증가하였다. 유기용매상으로 추출되는 추출종은 M1(crown ether)1 (HDEHP)1이며 추출평형상수의 크기는 crown ether의 유기용매상과 수용액상에서의 분배비와 crown ether-알칼리금속 착물의 안정도 상수에 의해서 결정된다.

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+ < Cs+ < Rb+ < K+, and in the DC24C8 system, Rb+ < K+ < Cs+. The species extracted to organic phase are M1(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.

359 - 368
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