Solvent extraction and separation of samarium from transition and rare-earth metals using phosphonium ionic liquid Cyphos IL 104,Monatshefte für Chemie - Chemical Monthly

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Solvent extraction and separation of samarium from transition and rare-earth metals using phosphonium ionic liquid Cyphos IL 104
Monatshefte für Chemie - Chemical Monthly ( IF 1.7 ) Pub Date : 2021-07-12 , DOI: 10.1007/s00706-021-02792-w
Bibhuti Bhusan Mishra ₁ , Niharbala Devi ₁ , Kadambini Sarangi ₂

Affiliation

The objective of this work is to investigate the extraction behavior of samarium from chloride medium using trihexyl(tetradecyl)phosphonium bis-2,4,4-(trimethylpentyl)phosphinate (Cyphos IL 104), and separation efficiency of samarium in presence of other rare-earth and transition metals. It is then extended to Sm-Co separation from secondary magnetic waste. The extraction efficiency of Cyphos IL 104 is studied in detail by varying the key extraction parameters like shaking time, aqueous phase pH, ionic liquid, metal and chloride ion concentration, type of diluents, and temperature of aqueous phase. Quantitative extraction of 0.002 mol/dm³ Sm(III) has been found using 0.02 mol/dm³ Cyphos IL 104. Extraction equilibrium of samarium with Cyphos IL 104 is explained using the slope analysis method and FT-IR study. NaCl is used as a salting out agent that increases the samarium extraction. Toluene is found to be best diluents for dilution of Cyphos IL 104. The stripping efficiency is observed to be quantitative with 20% H₂SO₄ and 5% HNO₃. The extraction process is endothermic in nature revealed from the temperature variation study. The investigation of samarium extraction in the presence of transition metals has been conducted and highest separation factors of 189.5 and 158.5 are obtained for Sm/Co and Sm/Ni, respectively, at initial pH 3.0.

Graphic abstract

中文翻译：

使用鏻离子液体 Cyphos IL 104 从过渡金属和稀土金属中溶剂萃取和分离钐

本工作的目的是研究使用双-2,4,4-（三甲基戊基）次膦酸三己基（十四烷基）鏻（Cyphos IL 104）从氯化物介质中提取钐的行为，以及在其他稀有杂质存在下钐的分离效率。 -地球和过渡金属。然后扩展到从二次磁性废物中分离 Sm-Co。通过改变关键提取参数（如摇动时间、水相 pH 值、离子液体、金属和氯离子浓度、稀释剂类型和水相温度），详细研究了 Cyphos IL 104 的提取效率。已发现使用 0.02 mol/dm ³定量提取 0.002 mol/dm ³ Sm(III)Cyphos IL 104。使用斜率分析方法和 FT-IR 研究解释了使用 Cyphos IL 104 提取钐的平衡。NaCl 用作盐析剂，可提高钐提取率。发现甲苯是用于稀释 Cyphos IL 104 的最佳稀释剂。观察到使用 20% H ₂ SO ₄和 5% HNO _{3 时}的汽提效率是定量的。从温度变化研究中可以看出，提取过程本质上是吸热的。在过渡金属存在下对钐萃取进行了研究，在初始 pH 值为 3.0 时，Sm/Co 和 Sm/Ni 的最高分离因子分别为 189.5 和 158.5。

图形摘要

更新日期：2021-07-12

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