溶剂萃取中分配比与有机相中溶质浓度间关系的研究（Ⅰ）

The Relation between the Distribution Ratio D and the Concentration C_0 of the Solute in Solvent Extraction

通过处理大量有关液－液两相平衡数据，提出在一定温度下，当某一溶质在互不相溶的两个溶剂之间进行分配时，两相达到平衡后，溶质在两相中的分配比对数（ｌｇＤ）与溶质在有机相中浓度对数（ｌｇＣｏ）之间具有线性关系。对模式中参数：萃取常数Ａ、选择因子Ｂ的意义及其影响因素等分别进行了讨论。

The distribution ratio D in solvent extraction may be considered as a function of theconcentration C0 of the solute in organic phase and the linear relationship has been found, in which Ais the extraction constant, B is the factor relating to its selectivity, C0 in the millimole concentrationof the solute in organic phase. The 310 groups data from literatures are used to test the reliability ofthe relationship. The physical meanning of the parameters A and B are discussed.