Functionalized ionic liquids (FILs) as extradants were employed for the separation of tungsten and molybdenum from a sulfate solution for the first time. The effects of initial pH, extractant concentration, metal concentrations in the feed were comprehensively investigated. The results showed that tricaprylmethylammonium bis(2,4,4-tiimethylpentyl)phosphinate ([A336][Cyanex272]) could selectively extract W over Mo at an initial pH value of 5.5; the best separation factor β_W/Mo of 25.61 was obtained for a solution with low metal concentrations (WO₃: 2.49 g/L, Mo: 1.04 g/L). The [A336][Cyanex272] system performed effectively for solutions of different W/Mo molar ratios and different metal ion concentrations in the feed. The chemical reaction between [A336][Cyanex272] and W followed the ion association mechanism, which was further proved by the Fourier-transform infrared (FTIR) spectra of loaded [A336][Cyanex272] and the free extractant. The stripping experiments indicated that 95.48% W and 100.00% Mo were stripped using a 0.20 mol/L sodium hydroxide solution. Finally, the selective extractions of W and Mo from two synthetic solutions of different high metal concentrations were obtained; the separation factor β_W/Mo reached 23.24 and 17.59 for the first and second solutions, respectively. The results suggest the feasibility of [A336][Cyanex272] as an extractant for the separation of tungsten and molybdenum.

首次采用功能化离子液体 (FIL) 作为萃取剂从硫酸盐溶液中分离钨和钼。全面研究了初始 pH、萃取剂浓度、进料中金属浓度的影响。结果表明，三辛基甲基铵双(2,4,4-三甲基戊基)次膦酸([A336][Cyanex272])在初始pH值为5.5时可以选择性地提取W而不是Mo；最好分离系数β _{W /沫}25.61是为具有低金属浓度的溶液得到（WO ₃：2.49 克/升，钼：1.04 克/升）。[A336][Cyanex272] 系统对不同 W/Mo 摩尔比和进料中不同金属离子浓度的溶液有效。[A336][Cyanex272] 和 W 之间的化学反应遵循离子缔合机制，负载的 [A336][Cyanex272] 和游离萃取剂的傅里叶变换红外 (FTIR) 光谱进一步证明了这一点。汽提实验表明，使用 0.20 mol/L 氢氧化钠溶液汽提了 95.48% W 和 100.00% Mo。最后，获得了从两种不同高金属浓度的合成溶液中选择性提取 W 和 Mo 的结果；分离因子β _W/Mo第一种和第二种解决方案分别达到 23.24 和 17.59。结果表明 [A336][Cyanex272] 作为分离钨和钼的萃取剂的可行性。