金属の溶媒抽出データの数値化

トリオクチルアミンによる塩酸溶液からの2価金属 (Co, Cu, Zn, Cd) 抽出系

抄録

In order to develop an appropriate method to accumulate numerically all of the distribution data, the digitization of the distribution data for divalent cobalt, copper, zinc and cadmium between hydrochloric acid solutions and the solutions of trioctylamine (TOA) in benzene has been examined by the methods utilizing chemical equilibrium model, its extended one and totally empirical one using a spline function.
Although the experimental data for solvent extraction of cobalt, copper, zinc and cadmium indicate that their distribution isotherms are of quite difference in shape each other, it is found that the method using a cubic spline function is most useful in them, in which the digitization is achieved by choosing the knots from experimental data appropriately with the aid of a microcomputer. By using the knots stored in memory, the numeric and graphic informations for the distribution of metals are obtained without any particular parameters. In contrast, it seems that chemical models are not always to follow the distribution data studied.