本文研究了协同萃取体系(D_2EHPA-H_2RPA-Al~(3+))的胶团化作用和界面特性[H_2RPA为长碳链单烷基磷酸脂,D_2EHPA为二(2—乙基己基)磷酸],以及液—液界面动力学。结果发现,混合体系中H_2RPA具有较强烈的胶团化作用和较高的界面活性,随着[D_2EHPA]的增加,其胶团化倾向和界面活性随之下降,H_2RPA和D_2EHPA具有完全相反的界面吸附行为,证实了非胶束混合萃取体系的动力学控制机制为界面化学反应控制型,得到了反应速率方程式,非胶束体系为有应用前景的混合萃取剂体系。
Study was made of the micellization, interfacial characteristics andextraction kinetics of a newly developed D_2 EHPA-H_2 RPA-Al~(3+) mixed system. In thesystem, more vigorous micellization and better interfacial acitivity of H_2RPA wererevealed. While it has a decreasing tendency to micellization and inter facial activitywith increase of D_2EHPA content. The adsorption behaviour of H_2RPA at the in-terface is quite contrary to that of D_2EHPA. The controlling mechanism of extra-ction kinetics for the non-micella mixed extractant system was confirmed as thetype of interfacial chemical reaction, and the equation for extraction rate was thusobtained. This non-micella extraction system of mixed extractants seems to befavourable to hydrometallurgy.
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