【摘要】 本文研究苯甲酸的正丁醇溶液对高氯酸氧铀的萃取,测得苯甲酸在正丁醇和水相间的平衡常数（A=58）,苯甲酸在鲍和正丁醇的水溶液中的电离常数(K_a=6.2×10^-5)和萃取反应的平衡常数(K=6.4×10^-5)。研究结果证明在水相中除UO₂²⁺外,倚有UO₂A⁺,UO₂A₂,UO₂（OH）⁺和UO₂（OH）A共四种格合物（A^-表示苯甲酸根）,其稳定常数经测定分别为:β₁₀=8.0×10²,β₂₀=1.8×10⁵,β₀₁=2.0×10⁹,β₁₁=5.2×10¹²。以上常数除K_α及β₀₁与文献值一致外,其余似尚无报告。交中提出一种较简便而较严谨的用萃取法测定混合型络合物的稳定常数的数据处理法。更多还原

【Abstract】 A convenient but rigorous method for evaluating the stability constants of complexes of the mixed-ligand type has been proposed and applied to the determination of the stability constants βij of UO₂A_i（OH）_i from distribution data. It is found that in the pH range studied there exist five uranyl species in aqueous phase, namely, UO₂²+, UO₂A+, UO₂A₂, UO₂（OH）+, and UO₂（OH）A, where A represents the benzoate ion, with the following stability constants:■The distribution constant of benzoic acid between n-butanol and water has also been determined to be A=58.更多还原