Isomer Effects in the Extraction of Metal Ionsfrom Acidic Nitrate Media by Dicyclohexano-18-crown-6†
Isomer Effects in the Extraction of Metal Ionsfrom Acidic Nitrate Media by Dicyclohexano-18-crown-6†
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DOI：
10.1524/ract.1999.85.34.119
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发表时间：
1999-06
影响因子：
2.8
通讯作者：
M. Dietz;A. Bond;Maureen Clapper;J. W. Finch
中科院分区：
文献类型：
--
作者：
M. Dietz;A. Bond;Maureen Clapper;J. W. Finch
本文研究了二环己基-18冠-6（DCH_（18）C_6）的顺-顺-顺、顺-反-顺异构体在正辛醇中从硝酸中萃取锶和钾。这两种异构体都能提取大量未解离的硝酸。这种萃取，沿着在水相中形成金属-硝酸根和金属-冠醚络合物，在确定两种异构体的金属离子萃取效率方面显示出重要性。的DCH 18 C6异构体产生更有效的提取钾或锶被证明取决于冠醚浓度和硝酸水溶液的浓度。
The extraction of Strontium and potassium from nitric acid by the cis-syn-cis and cis-anti-cis isomers of dicyclohexano-18crown-6 (DCH18C6) in 1-octanol is examined. Both isomers are shown to extract significant amounts of undissociated nitric acid. This extraction, along with the formation of metal-nitrato and metal-crown ether complexes in the aqueous phase, is shown to be important in determining the efficiency of metal ion extraction by the two isomers. The DCH18C6 isomer yielding the more efficient extraction of potassium or Strontium is shown to depend upon the crown ether concentration and the aqueous nitric acid concentration.