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Four ionic liquids(ILs): 3-(diethoxyphosphoryl)propyl triphenylphosphinium hexafluorophosphate [Ph3PC3P(OEt)2][PF6](IL-1), 3-(ethoxyphenylphosphoryl)propyl triphenylphosphinium hexafluorophosphate [Ph3PC3PPh(OEt)][PF6](IL-2), 3-(diphenylphosphoryl)propyl triphenylphosphinium hexafluorophosphate [Ph3PC3P(Ph)2][PF6](IL-3), and 3-(diethoxyphosphoryl)propyl triphenylphosphinium bis(trifluoromethanesulfonyl)imide [Ph3PC3P(OEt)2][NTf2](IL-4) were synthesized and characterized by IR and 31 P, 1H, 13 C NMR spectroscopy. The liquid-liquid extraction of neodymium(III) by these phosphorus functionalized ionic liquids(PFILs) diluted with common room temperature ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C6mim][NTf2] was studied. The extraction percentage of Nd(III) was measured as a function of various parameters, such as the initial p H of aqueous phase, equilibrium time, temperature, and concentration of PFIL extractant. The influence of the nature of diluents and salting-out reagents on extraction was also investigated. The results indicated that the extraction process was exothermical and the extraction percentage of Nd(III) by IL-1 was the highest among the PFILs investigated. A possible metal complexation mechanism was proposed for the present PFIL/IL extraction system. And the loaded Nd(III) ions by PFIL could be stripped completely from the ionic liquid phase by 1 mol/L nitric acid.
Four ionic liquids (ILs): 3- (diethoxyphosphoryl) propyltriphenylphosphonium hexafluorophosphate [Ph3PC3P (OEt) 2] [PF6] (IL-1) 2) [3- (diphenylphosphoryl) propyltriphenylphosphonium hexafluorophosphate [Ph3PC3P (Ph) 2] [PF6] (IL-3) and 3- (diethoxyphosphoryl) propyl triphenylphosphinium bis (trifluoromethanesulfonyl) imide [Ph3PC3P (OEt) 2] (IL-4) were synthesized and characterized by IR and 31 P, 1H, 13 C NMR spectroscopy. The liquid-liquid extraction of neodymium (III) by these phosphorus functionalized ionic liquids (PFILs) diluted with common room temperature ionic liquid 1 The extraction percentage of Nd (III) was measured as a function of various parameters, such as the initial pH of aqueous phase, equilibrium time, temperature, and concentration of PFIL extractant. The influence of the nature of diluents an The results indicated that the extraction process was exothermical and the extraction percentage of Nd (III) by the highest among the PFILs investigated. A possible metal complexation mechanism was proposed for the Present PFIL / IL extraction system. And the loaded Nd (III) ions by PFIL could be stripped completely from the ionic liquid phase by 1 mol / L nitric acid.