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›› 2001, Vol. 1 ›› Issue (3): 0-0.

• 3 •    

1,4-双(1?-苯基-3?-甲基-5?-氧代吡唑-4?-基)丁二酮-[1,4]与二安替吡啉甲烷协同萃取Ln(III)的性能和机理

张安运，杨子超   

  1. 陕西师范大学化学系，陕西 西安 710062
  • 出版日期:2001-06-20 发布日期:2001-06-20

Synergistic Extraction of Lanthanide Ions with 1,4–Bis (1￠–Phenyl–3￠–Methyl– 5￠–Pyrazolone–4￠–yl)–Butanedione–[1,4] and Diantipyryl Methane

ZHANG An-yun, YANG Zi-chao   

  1. Department of Chemistry, Shaanxi Normal University, Xi￠an, Shaanxi 710062, China
  • Online:2001-06-20 Published:2001-06-20

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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.

关键词: 镧系元素, 4–双(1?–苯基–3?–甲基–5?–氧代吡唑–4?–基)丁二酮–[1, 4], 二安替吡啉甲烷, 协同萃取

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.

Key words: lanthanide ion, synergistic extraction, 4–bis(1￠–phenyl–3￠–methyl–5￠–pyrazolone–4￠–yl)–butanedione –[1, 4], diantipyryl methane

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