Selective separation of Nd from La/Ce/Pr using phosphate-based ionic liquids: Solvent extraction studies and density functional theory

Experimental and Theoretical Studies on Selective Separation of Nd from La/Ce/Pr Using [Omim][DOP]

“…Based on the results of the pre-experiments, we selected the best experimental conditions. , The extraction procedure was followed in the specified steps unless otherwise noted. The pH of the LREE raw material solution was initially set at 4, and the concentration of each LREE was 0.015 mol·L –1 .…”

“…The concentration difference subtraction method was used to calculate the LREE content in the IL phase. For details of the calculation of E , β, distribution ratio ( D ), and stripping efficiency ( S ), refer to our previous study. , …”

“…The preparation of [N 1,1,8,H ][DEHP] and [Hmpy][DEHP] was referred to in our previous work. 21 The FT-IR and 1 H NMR characterization of ILs are provided in the supporting information in Figures S1 and S2 Extraction Procedure and Parameter Calculation Method. Based on the results of the pre-experiments, we selected the best experimental conditions.…”

“…For details of the calculation of E, β, distribution ratio (D), and stripping efficiency (S), refer to our previous study. 21,22 DFT Calculations. DFT calculations were conducted using the Gaussian 09 program to investigate in-depth the mechanism of [Omim][DOP] for the efficient extraction of Nd(III).…”

“…DFT calculations were conducted using the Gaussian 09 program to investigate in-depth the mechanism of [Omim][DOP] for the efficient extraction of Nd(III). 21,25 The six systems of…”