Solvent extraction of silver with 5,5-diphenyl-2, 4-imidazolidinedione

被引：0
|
作者：
Asakawa, T [1 ]
Inoue, K
Yoshizuka, K
Ohto, K
机构：
[1] Electroplating Engineers Japan LTD, Hiratsuka, Kanagawa 2540076, Japan
[2] Saga Univ, Dept Appl Chem, Saga 8408502, Japan
来源：
KAGAKU KOGAKU RONBUNSHU | 1999年 / 25卷 / 04期
关键词：
silver; solvent extraction; 5,5-diphenylhydantoin; 5,5-diphenyl-2,4-imidazolidinedione;
D O I：
10.1252/kakoronbunshu.25.662
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Solvent extraction of silver using 5,5-Diphenyl-2,4-Imidazolidinedione as an extractant is investigated. It is found that the distribution ratio was second order dependent on both of extractant and silver ( I ) ion concentration as well as inversely dependent on hydrogen ion, suggesting that silver ( I ) ion is extracted as binuclear complex, Ag2R2. The extraction equilibrium constant K is evaluated as 2.0 x 10(-5)[dm(3)/mol]. Stripping of loaded silver is nearly completely accomplished by 0.1 mol/dm(3)-nitric acid. Silver was selectively extracted over thallium(I), nickel(II), copper(II), and even over pal ladium(II).
引用
收藏
页码：662 / 664
页数：3
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