【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:?Hi₃^aXj_i4^aYj_i5^a（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—一串级模型。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。更多还原

【Abstract】 The experimental results of the extraction equlibrium and fractional counter currentextraction 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 phaserespectively. From the data obtained in the extraction equlibrium a semiempirical distri-bution model D_i=_i≠ja_i1Z_i2^aH_i3^aX_j^a i4Y_i5^a （i, j=1,2） has been deduced, which issimple in calculation with a certain accuracy. Non-linear equations for the distributionbetween aqueous and organic phases and the mass equilibrium in each stage for the coun-ter current. extraction were given. The matrix method and FORTRAN program wereintroduced for the calculation. The calculated values of metal ion concentration, acidityand concentration of the extractants for each stage are in good agreement with the expe-rimental ones.更多还原