极性有机化合物在电解质水溶液中盐效应的研究(Ⅰ)定标粒子理论的改进及其在二(2-乙基己基)磷酸-碱金属氯化物-水三元体系中的应用

1. 清华大学化工系
• 收稿日期:1985-06-29 修回日期:1985-10-26 发布日期:1986-04-15

SALTING EFFECT OF POLAR ORGANIC COMPOUND IN ELECTROLYTE SOLUTIONS(Ⅰ)An Improvement in Scaled Particle Theory and Its Application in D2EHPA-Alkali Chloride-H2O Ternary Systems

Lu Jiufang; Ding Hongbing; Li Yigui; Teng Teng

1. Department of Chemical Engineering Tsinghua University, Beijing
• Received:1985-06-29 Revised:1985-10-26 Published:1986-04-15

Abstract: In this paper, the scaled particle theory (SPT) is improved by considering various interactions among particles in solution and then is applied to ternary sys- tems with a polar organic compound.
The salting effect constants of di(2-ethyl-hexyl) phoshoric acid (D2EHPA) in alkali chloride solutions were determined by tracer technique. By comparing the results calculated by the improved SPT formulas with the experimental values, it seems that the improved SPT formulas are much better than the previous if the parameters are chosen properly.
It is found that the calculated results are sensitive to the ionic radii and the hardcore diameter of the non-electrolyte. A method, based on the packing factor, is also suggested to estimate the hardcore diameter of the non-electrolyte.