Rhenium(Re) is a highly valuable metal recovered from molybdenite leach liquors by solvent extraction (SX) using toxic organic solvents. This work proposes an extracting phase free of volatile organics composed by the ionic liquid (IL) trioctylmethylammonium benzoate [TOMA][BA] as the extractant, due to its ability to extract Re(VII), and the IL 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [omim][Tf₂N] as the diluent, due to its high hydrophobicity where the extraction stoichiometry and process parameters such as the initial pH, the extractant concentration in the diluent and stripping using ammonium hydroxide (𝐍𝐇4𝐎𝐇$\mathbf{N}{\mathbf{H}}_4\mathbf{OH}$$\mathbf{N}{\mathbf{H}}_4\mathbf{OH}$) and sodium hydroxide (𝐍𝐚𝐎𝐇$\mathbf{\text{NaOH}}$$\mathbf{\text{NaOH}}$) were assessed.

中文翻译：

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使用离子液体作为稀释剂和萃取剂从硫酸水溶液中萃取铼 (VII)：萃取化学计量和工艺参数的见解

铼 (Re) 是通过使用有毒有机溶剂的溶剂萃取 (SX) 从辉钼矿浸出液中回收的高价值金属。这项工作提出了一种不含挥发性有机物的萃取相，由离子液体 (IL) 三辛基甲基苯甲酸铵 [TOMA][BA] 作为萃取剂，因为它能够萃取 Re(VII) 和 IL 1-octyl-3-甲基咪唑双（三氟甲基磺酰基）亚胺 [omim][Tf ₂ N] 作为稀释剂，由于其高疏水性，在萃取化学计量和工艺参数（如初始 pH 值、稀释剂中萃取剂浓度和使用氢氧化铵反萃取）时（𝐍𝐇4𝐎𝐇$\mathbf{ñ}{\mathbf{H}}_4\mathbf{哦}$$\mathbf{N}{\mathbf{H}}_4\mathbf{OH}$) 和氢氧化钠 (𝐍𝐚𝐎𝐇$\mathbf{\text{氢氧化钠}}$$\mathbf{\text{NaOH}}$) 进行了评估。