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在较高的钇离子浓度下,应用“循环法”,改进了A.W.Fletcher 的数据处理方法,研究了Versatic 10萃取钇的平衡。在温度为25±1℃下,有机相由Versatic 10和正己烷组成,水相由YCl_2和HCl 组成,水相中加入NaCl 维持离子强度为1.实验确定萃合物的组成为YA_3·3HA,表观萃取平衡常数为2.8×10~(-14)～9.5×10~(-14).萃取反应式表示如下:Y_(α)~(3+)+6H_2A_(2(o))(?)YA_3·3HA_(o)+3H~+_(α)
At higher concentrations of yttrium ions, “circulation method” was applied to improve the data processing method of A.W. Fletcher and to study the balance of yttrium extracted by Versatic 10. The organic phase consisted of Versatic 10 and n-hexane at a temperature of 25 ± 1 ° C. The aqueous phase consisted of YCl 2 and HCl, and NaCl was added to the aqueous phase to maintain the ionic strength of 1. The composition of the complex was determined to be YA 3 · 3HA, The apparent equilibrium constant of extraction is 2.8 × 10 ~ (-14) ~ 9.5 × 10 ~ (-14) .The extraction reaction equation is expressed as follows: Y_ (α) ~ (3 +) + 6H_2A_ (2 (o)) YA_3 · 3HA_ (o) + 3H ~ + _ (α)