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本文研究了1—苯基—3—甲基—4—苯甲酰基吡唑酮—5(简称PMBP)与邻二氮菲对Eu(Ⅲ)的协同萃取。实验证明,邻二氮菲对PMBP萃取稀土Eu(Ⅲ)有很强的协萃作用。用浓比递变法及斜率法确定,在本实验条件下,协萃合物组成为EuA_3·B。计算得出Eu(Ⅲ)/HClO_4,NaAc(μ=0.2)/PMBP-C_6H_6体系的logKex=-4.83±0.08。Eu(Ⅲ)/HClO_4,NaAc(μ=0.2)/PMBP-Phen-C_6H_6体系的协萃平衡常数logKs.e.=3.36±0.25。并得出有机相协萃合物生成平衡常数β_3·1=8.19±033。
In this paper, the synergistic extraction of Eu (Ⅲ) with 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (PMBP) and phenanthroline was investigated. Experiments show that, phenanthroline on PMBP extraction of rare earth Eu (Ⅲ) has a strong synergistic effect. With the ratio of graded method and the slope method to determine, in this experimental conditions, the complex composition of EuA_3 · B. The calculated logKex of Eu (Ⅲ) / HClO_4 and NaAc (μ = 0.2) / PMBP-C_6H_6 systems was -4.83 ± 0.08. Eu (Ⅲ) / HClO_4, NaAc (μ = 0.2) / PMBP-Phen-C_6H_6 system, the equilibrium constant of extraction logKs.e. = 3.36 ± 0.25. The results showed that the equilibrium constant β_3 · 1 = 8.19 ± 033.