中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (5): 48-51.

• 研究论文 • 上一篇    下一篇

在不同稀释剂中二(2－乙基己基)磷酸萃取Ni(Ⅱ)的热力学

杨永会1, 孙国新2, 孟祥建1, 王友绍2, 孙思修1   

  1. 1. 山东大学化学系 济南 250100;
    2. 中国科学院上海原子核研究所 上海
  • 收稿日期:1995-10-24 修回日期:1996-05-20 出版日期:1996-10-10 发布日期:1996-10-10

Extraction Equilibrium of Ni(Ⅱ) with Bis(2-ethylhexyl) Phosphoric Acid in Different Diluents

Yang Yonghui1, Sun Guoxin2, Meng Xiangjian1, Wang Youshao2, Sun Sixiu1   

  1. 1. Department of Chemistry, Shandong University, Jinan 250100;
    2. Shanghai Institute of Nuclear Resenrch, Chinese Academy of Sciences, Shanghai
  • Received:1995-10-24 Revised:1996-05-20 Published:1996-10-10 Online:1996-10-10

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摘要： 研究了在不同稀释剂如苯、甲苯、正己烷、环己烷、四氯化碳、氯仿中萃取剂浓度、水相酸度以及温度对二(2-乙基己基)磷酸萃取Ni(Ⅱ)的平衡的影响,借助萃合物红外光谱,确定了萃合物组成和萃取反应机理。讨论了稀释剂的影响,利用多参数方程将萃取平衡常数以及分配比与稀释剂的物理常数和经验参数进行了定量关联。

关键词: 二乙基己基磷酸, 稀释剂, 萃取平衡

Abstract: The extraction of Ni(Ⅱ) from 0.100 mol/L CH3COO(H,Na) with HDEHP in different diluents, such as benzene,toluene,n-hexane, cyclohexane, CCl4 and chloroform, has been studied. The species formed in the extraction and the extraction machanism have been examined by means of IR spectra. It shows that the complex formed in chloroform is different from that formed in other diluents. The effect of diluents is discussed. The extraction equilibrium constants and the extraction distribution are correlated with the physical constants and(or) experimental parameters of diluents, respectively. The effect of temperature has also been investigated, and the thermodynamic constants △G0, △H0 and △S0 at 298 K are obtained.

Key words: HDEHP, diluent, extraction equilibrium

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