Abstract In this paper, as an alternative to the traditional extraction systems, multicomponent biphasic solvent systems used in liquid-liquid chromatography are suggested for application in hydrometallurgy. Three-component biphasic solvent system (1:1:1) consisting of water, hexane, and isopropyl alcohol was tested for the extraction of lanthanides(III) from chloride and nitrate media by adding different extractants to the system. Di(2-ethylhexyl)phosphoric acid (D2EHPA) and mixtures of ionic liquids (IL) dissolved in hexane were investigated as extractants. Results showed that the extraction efficiency of Ln(III) with D2EHPA increases with the addition of sodium acetate or a mixture of CH3COONa and CH3COOН. Extraction of lanthanides(III) with mixtures of various IL from 0.5 M solutions of NaCl or NaNO3 was examined. Effective separation of Ln(III) was observed by using a mixture of trioctylammonium di(2-ethylhexyl)phosphate and dicyclohexylammonium caprylate (2:1), whereas by using a mixture of trioctylammonium caprylate and dicyclohexylammonium di(2-ethylhexyl)phosphate (2:1) the Ln(III) separation did not occur.

中文翻译：

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在三组分双相溶剂系统中用二（2-乙基己基）磷酸和离子液体从氯化物和硝酸盐介质中溶剂萃取镧系元素（III）

摘要 在本文中，作为传统萃取系统的替代方案，液-液相色谱中使用的多组分双相溶剂系统被建议用于湿法冶金。通过向系统中添加不同的萃取剂，测试了由水、己烷和异丙醇组成的三组分双相溶剂系统 (1:1:1) 从氯化物和硝酸盐介质中萃取镧系元素 (III)。二（2-乙基己基）磷酸 (D2EHPA) 和溶解在己烷中的离子液体 (IL) 混合物作为萃取剂进行了研究。结果表明，加入乙酸钠或 CH3COONa 和 CH3COOН 的混合物后，D2EHPA 提取 Ln(III) 的效率增加。检查了用各种离子液体的混合物从 0.5 M NaCl 或 NaNO3 溶液中提取镧系元素 (III)。