【摘要】 在硝酸介质中研究了1,4-双(1’-苯基-3’-甲基-5’-氧代吡唑-4’-基)丁二酮-[1,4]与二安替吡啉甲烷的氯仿溶液协同萃取Ln3+(Ln=La, Pr, Nd, Sm, Gd和Dy)的性能. 通过考察萃取剂浓度、溶液酸度和温度等因素对Ln(III)萃取平衡的影响，确定了萃取机理和萃合物组成，求得了萃取反应平衡常数Ks.e.和有关热力学参数.更多还原

【Abstract】 The synergistic extraction of lanthanide ions Ln3+ (Ln=La, Pr, Nd, Sm, Gd, Y and Dy) in nitric acid solution at (30(1)(C with 1,4-bis(1’-phenyl-3’-methyl-5’-pyrazolone-4’-yl)-butanedione-[1,4](H2A) and dian- tipyryl methane(DAM) has been studied. The results show that there is a notable synergistic effect on La3+ for the H2A+DAM system, and the synergistic extraction coefficient of La3+ is calculated to be 6.1. By investigating the influence of concentrations of H2A and DAM on the extraction of La3+, the composition of extracted compound is determined as LaA.HA.DAM. The pH1/2 values of La3+, Pr3+, Nd3+, Sm3+, Gd3+ and Dy3+ are 4.15, 3.64, 3.53, 3.37, 3.23 and 3.14, respectively. Meanwhile, the extraction equilibrium constants and thermodynamic parameters are also calculated.更多还原