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首页> 外文期刊>RSC Advances >Extraction of iridium(IV) from aqueous solutions using hydrophilic/hydrophobic ionic liquids
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Extraction of iridium(IV) from aqueous solutions using hydrophilic/hydrophobic ionic liquids

机译：使用亲水/疏水离子液体从水溶液中萃取铱（IV）

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Anionic complexes of iridium(IV) were extracted from acidic solutions of HCl using ionic liquids (IL). The influence of the cationic structure of IL and of the aqueous phase pH on the distribution coefficients of IrCl62- was investigated. Liquid--liquid extraction and precipitation of iridium(IV) were studied. Iridium(IV) was precipitated from aqueous solutions using water-soluble ionic liquids by forming a water-insoluble salt composed of two cations from the ionic liquid. Pyridinium cations appear to be the most efficient at precipitating iridium(IV). Iridium(IV) was found to be efficiently extracted using simple hydrophobic ionic liquids, exhibiting D values ranging up to 71. Investigations on the extraction mechanism tend to show that iridium(IV) is exchanged with two [NTf2](-) anions from the IL phase. Finally, elution of iridium(IV) from ionic liquids towards aqueous solutions was carried out from [BMIM][NTf2], [OMIM][NTf2] or [OdMIM] [NTf2] into solutions containing high amounts of hydrochloric acid or nitric acid.
机译：使用离子液体（IL）从HCl的酸性溶液中萃取铱（IV）的阴离子络合物。研究了IL的阳离子结构和水相pH值对IrCl62-分布系数的影响。研究了铱的液-液萃取和沉淀。使用水溶性离子液体通过从离子液体形成由两个阳离子组成的水不溶性盐，从水溶液中沉淀出铱（IV）。吡啶鎓阳离子似乎在沉淀铱（IV）方面最有效。铱（IV）被发现可以使用简单的疏水离子液体有效地提取，其D值高达71。对提取机理的研究表明，铱（IV）与阴离子中的两个[NTf2]（-）阴离子交换。 IL期。最后，从[BMIM] [NTf2]，[OMIM] [NTf2]或[OdMIM] [NTf2]从离子液体向水溶液中洗脱铱（IV）到含有大量盐酸或硝酸的溶液中。

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