Abstract

The extraction of rare-earth elements (REEs) from chloride (0.01 M HCl + 0.1 M NaCl) and nitrate (0.01 M HNO₃ + 0.1 M NaNO₃) solutions in ternary hexane–isopropanol–water systems with the use of di(2-ethylhexyl)phosphoric acid (D2EHPA) as an extragent is studied. It is shown that the extractability of rare-earth elements improves with increasing atomic number, as is typical for the extraction systems with D2EHPA. It is established that the use of a di(2-ethylhexyl)phosphoric acid–caprylic acid mixture improves the solubility of extractable compounds and the recovery of metals.

中文翻译：

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用二（2-乙基己基）磷酸从多组分体系中的氯化物和硝酸盐溶液中萃取稀土元素

摘要

使用 di(2) 从三元己烷-异丙醇-水系统中的氯化物 (0.01 M HCl + 0.1 M NaCl) 和硝酸盐 (0.01 M HNO ₃ + 0.1 M NaNO ₃ ) 溶液中萃取稀土元素 (REE)研究了作为萃取剂的磷酸（D2EHPA）。结果表明，稀土元素的萃取率随着原子序数的增加而提高，这对于采用 D2EHPA 的萃取系统来说是典型的。已确定使用二(2-乙基己基)磷酸-辛酸混合物可提高可萃取化合物的溶解度和金属的回收率。