本文利用斜率法、恒摩尔法和红外光谱，研究了环烷酸在正庚烷溶液中，对钪(Ⅲ)的萃取机理。实验结果表明，在正庚烷体系中，环烷酸与钪(Ⅲ)形成了萃合物Sc(OH)A2*2HA,(HA代表环烷酸)，常温时的萃取平衡常数logKex=-3.7727±0.05465，化学反应方程式可为：Sc(OH)2++4HA=Sc(OH)A2.2HA+2H+。
The extraction behavior of Sc(Ⅲ)using a n-heptane solution containing naphthenic acid has been investigated systematically.The stoichiometry of the extracted scandium and the extraction constants for the present aqueous-heptane system were found by slope and isomolar (isonormal)series methods.Sc(Ⅲ)was found to be extracted by naphthenic acid as a complex Sc(OH)A2.2HA.The IR spectra of the HA and its extracted complexes have also been discussed.
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