Liquid – Liquid Equilibria in the Water – Nitric Acid – Europium Nitrate – Gadolinium Nitrate – Tributyl Phosphate System at 298.15 KстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 4 июня 2021 г.
Аннотация:Liquid – liquid equilibria in the H2O – HNO3 – Eu(NO3)3 – Gd(NO3)3 – tributyl phosphate (TBP) system and in two H2O – HNO3 – Ln(NO3)3 – TBP (Ln = Eu, Gd) subsystems have been investigated at 298.15 K in a wide range of nitric acid and rare earth elements (REEs) concentrations. The total compositions of the extraction systems and the content of REEs and nitric acid in equilibrium phases are presented. Densities of solutions in two subsystems have been measured. The distribution coefficients of REEs and nitric acid and the separation factor of REEs in equilibrium phases have been determined. The obtained experimental data can be further used for thermodynamic modeling of systems that are promising for the extraction separation of REEs.