Substituent effects in the extraction of cesium from acidic nitrate media with macrocyclic polyethers

被引：22

作者：

Dietz, ML ^{[1
]}

Horwitz, EP ^{[1
]}

Jensen, MP ^{[1
]}

Rhoads, S ^{[1
]}

Bartsch, RA ^{[1
]}

Palka, A ^{[1
]}

Krzykawski, J ^{[1
]}

Nam, J ^{[1
]}

机构：

[1] TEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 1996年 / 14卷 / 03期

关键词：

D O I：

10.1080/07366299608918345

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A variety of dibenzocrown ethers have been evaluated for the extraction of cesium from acidic nitrate media. Compounds incorporating a 21-crown-7 moiety are shown to exhibit greater cesium/sodium selectivity, superior functional stability, and better compatibility with PUREX-like diluents than dibenzocrown ethers with other ring sizes. The cesium distribution ratios obtained with these compounds, however, are generally not large enough to be of practical value. Higher D-C5 values are achieved with several dibenzo-18-crown-6 derivatives. Of these, the best results are achieved with 4,4'(5')-di[(1-hydroxy-2-ethylhexyl)benzo]-18-crown-6. The distribution ratios obtained with this compound in undiluted tri-n-butyl phophate (TBP) compare favorably with those reported for synergistic systems combining a crown ether with the anion of a lipophilic organic acid.

引用

页码：357 / 384

页数：28

共 38 条

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[2]

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[3]

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[4]

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