Separation of Te(IV) and Se(IV) by extraction with Cyanex 925

被引：10
|
作者：
Mhaske, AA [1 ]
Dhadke, PM [1 ]
机构：
[1] Univ Bombay, Dept Chem Technol, Inorgan Chem Lab, Div Appl Chem, Bombay 400019, Maharashtra, India
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2003年 / 38卷 / 14期
关键词：
extraction; tellurium(IV); selenium(IV); separation; temperature; Cyanex; 925;
D O I：
10.1081/SS-120023418
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Liquid-liquid extraction of tellurium(IV) and selenium(IV) with Cyanex 925 in toluene from aqueous hydrochloric acid media was studied separately, under the influence of variables such as: hydrochloric acid concentration, reagent concentration, equilibration time, diverse ions, stripping agents, and temperature. The difference in extractability of these metal ions in hydrochloric acid media toward Cyanex 925 facilitates their separation. The temperature dependence of extraction equilibriums were examined by the temperature variation method to estimate apparent thermodynamic function, DeltaH. From the temperature study, the extraction reaction for Te(IV) was found to be exothermic in nature, while that of Se(IV) endothermic.
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页码：3575 / 3589
页数：15
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