Separation of Ir(IV) and Rh(III) from mixed chloride solutions by solvent extraction
Separation of Ir(IV) and Rh(III) from mixed chloride solutions by solvent extraction
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DOI：
10.1016/j.hydromet.2010.11.008
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发表时间：
2011-01-01
期刊：
影响因子：
4.7
通讯作者：
Lee, M. S.
中科院分区：
文献类型：
--
作者：
Sun, P. P.;Lee, M. S.
为了寻找分离铑和铱的最佳条件，以Alamine336和TBP为萃取剂，从氯化物溶液中进行了溶剂萃取实验。考察了萃取条件对HCl、SnCl2和萃取剂浓度对两种金属分离的影响。在我们的系统中，Rh（III）和Ir（IV）的浓度分别固定在0.0005 m和0.00025 m。在没有SnCl2的情况下，Alamine336和TBP对Ir（IV）的萃取率远高于对Rh（III）的萃取率。SnCl2的加入抑制了Ir（IV）的萃取，而由于SnCl2的还原作用，提高了Rh（III）的萃取。在混合溶液中加入SnCl2可以改变Alamine336和TBP对Rh和Ir的萃取顺序。在SnCl2存在下，Alamine336的分离率最高。利用我们的结果，Rh（III）或Ir（IV）可以选择性地提取到Alamine336或TBP中，而Alamine336或TBP的选择取决于HCl的浓度。(C) 2010年Elsevier B.V.出版
In order to find an optimum condition to separate rhodium and iridium, solvent extraction experiments were performed from chloride solution by using Alamine336 and TBP as an extractant. Effects of extraction conditions on the separation of both metals were investigated as a function of the concentration of HCl, SnCl2, and extractants. In our system, the concentration of Rh(III) and Ir(IV) were fixed at 0.0005 and 0.00025 M. respectively. In the absence of SnCl2, extraction percentage of Ir(IV) by Alamine336 and TBP was much higher than that of Rh(III) from the mixed solution. However, adding SnCl2 to the mixed solution depressed the extraction of Ir(IV), while the extraction of Rh(III) was increased owing to the reducing action of SnCl2. Extraction order of Rh and Ir by Alamine336 and TBP can be changed by adding SnCl2 to the mixed solution. The highest separation factor was obtained by using Alamine336 in the presence of SnCl2. By utilizing our results, Rh(III) or Ir(IV) can be selectively extracted into Alamine336 or TBP and the choice of either Alamine336 or TBP depends on the concentration of HCl. (C) 2010 Published by Elsevier B.V.