The synergistic extraction of lanthanide ions(La 3+ , Pr 3+ , Nd 3+ , Gd 3+ , Dy 3+ ) by mixture of title butanedione compound (H 2BPMPBD or H 2A) with 4 hydroxyantipyrine(HAP) from nitric acid solution has been studi...The synergistic extraction of lanthanide ions(La 3+ , Pr 3+ , Nd 3+ , Gd 3+ , Dy 3+ ) by mixture of title butanedione compound (H 2BPMPBD or H 2A) with 4 hydroxyantipyrine(HAP) from nitric acid solution has been studied. The synergistic coefficient for La 3+ was 9 01. The composition of the extracted compound was shown to be LaA·HA·HAP. The pH 1/2 values for La 3+ , Pr 3+ , Nd 3+ , Gd 3+ and Dy 3+ were 3 95, 3 44, 3 20, 3 06 and 2 74, respectively. The extraction equilibrium constants, enthalpy change and entropy change of the reaction also have been calculated.展开更多
文摘The synergistic extraction of lanthanide ions(La 3+ , Pr 3+ , Nd 3+ , Gd 3+ , Dy 3+ ) by mixture of title butanedione compound (H 2BPMPBD or H 2A) with 4 hydroxyantipyrine(HAP) from nitric acid solution has been studied. The synergistic coefficient for La 3+ was 9 01. The composition of the extracted compound was shown to be LaA·HA·HAP. The pH 1/2 values for La 3+ , Pr 3+ , Nd 3+ , Gd 3+ and Dy 3+ were 3 95, 3 44, 3 20, 3 06 and 2 74, respectively. The extraction equilibrium constants, enthalpy change and entropy change of the reaction also have been calculated.
