中华医学超声杂志

应用化学 ›› 1985, Vol. 0 ›› Issue (3): 55-61.

• 研究论文 • 上一篇    下一篇

分馏萃取分离稀土的数学模拟—HEH(EHP)-煤油-HNO3-(Sm-Gd)(NO3)3体系

周家驹1, 许志宏1, 陈志传2, 李涵2   

  1. 1. 中国科学院化工冶金研究所;
    2. 中国科学院长春应用化学研究所
  • 收稿日期:1984-07-18 修回日期:1985-02-26 出版日期:1985-09-10 发布日期:1985-09-10

A MATHEMATIC SIMULATION OF THE COUNTER CURRENT EXTRACTION IN SYSTEM HEH(EHP)-KEROSENE-HNO3-(Sm-Gd)(NO3)3

Zho Jiaju1, Xu Zhihong1, Chen Zhichuan2, Li Han2   

  1. 1. Institute of Chemical Metallurgy, Academia Sinica;
    2. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1984-07-18 Revised:1985-02-26 Published:1985-09-10 Online:1985-09-10

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摘要： 进行了HEH(EHP)-煤油-HNO3-(Sm-Gd)(NO3)3体系的萃取平衡实验与分馏萃取实验。串级实验得到了水相出口Sm的纯度为96.7%,有机相出口Gd的纯度>99%的结果。应用萃取平衡实验数据建立了计算简便、精度较高的半经验两相分配模型: Hi3aXji4aYji5a(i,j=1,2)。给出了由各级平衡分配模型和物料衡算式组成的非线性方程组—串级模型。介绍了模拟计算所用的矩阵解法及其FORTRAN程序,计算所得各级金属离子浓度、水相酸度、以及自由萃取剂浓度的分布与实验值符合程度较高。

Abstract: The experimental results of the extraction equlibrium and fractional counter current extraction in system HEH(EHP) -Kerosene-HNO3-(Sm-Gd)(NO3)3 are reported. 96.7% of Sm and more than 99% of Gd were obtained in the raffinate and solvent phase respectively. From the data obtained in the extraction equlibrium a semiempirical distribution model Hai3Xaj i4Yai5 (i, j=1,2) has been deduced, which is simple in calculation with a certain accuracy. Non-linear equations for the distribution between aqueous and organic phases and the mass equilibrium in each stage for the counter current. extraction were given. The matrix method and FORTRAN program were introduced for the calculation. The calculated values of metal ion concentration, acidityand concentration of the extractants for each stage are in good agreement with the experimental ones.

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