在溶液理论的基础上,提出了一种新的热力学处理方法,用于计算有机相组分活度系数、测定金属溶剂萃取反应热力学平衡常数以及预测金属萃取平衡分配.用纯热力学方法研究了:TBP-UO_2Cl_2,TBP-UO_2(NO_3)_2和(C_7H_(15))_2SO-UO_2(NO_3)_2等三种中性溶剂金属萃取体系.检验和比较了七种模型,其中以 Scat-chard-Hildebrand 和 Guggenheim 模型对实际计算更为简便,这两种模型不仅能用于三组分有机相,且能用于四组分有机相.
Based on the solution theory,the thermodynamical approaches to calculation of the component activity coefficients in organic phases,to determination of the thermodynamical equilibrium constant of metal extraction reaction and to predic- tion of the metal extraction equilibrium distribution are presented.Three neutral solvent-metal extraction systems,TBP-UO_2Cl_2,TBP-UO_2(NO_3)_2 and (C_7H_(15))_2SO-UO_2 (NO_3)_2,have been tested solely by thermodynamical method.Seven models have also been examined and compared,Among them,the Scatchard-Hildebrand and Guggenheim ones are more simple and convenient for calculating practice.These two models have tried all available to both quarternary and ternary organic phases.
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