【摘要】 本文系统研究了异丙基膦酸二（2-乙基己基）酯在3M和14M HNO₃水相中萃取镧系元素（除钷以外）和钇的递变规律。测定了不同温度（10～60℃）的萃取平衡放据,考察了它们的递变规律。有机相中水含量的变化经测定显示有近似的四分组效应。对萃取过程中镧系离子的硝酸根络合度和水合度对递变规律的影响进行了讨论。更多还原

【Abstract】 The regularity of the variation in solvent extraction of lanthanides （except promethium） and yttrium by di（ethylhexyl）isopropylphosphonate （DIOPP） from 3N and 14N HNO₃ of aqueous phase has been described in detail in this paper, The extraction equilibrium data at various temperatures （10～60℃） were determined. The regularity of the variation of these equilibrium data and thermodynamic funotion was examined, The variation of water contents in organic phase was measured and showed tetrad effect roughly, The inflnence of the degree of nitrate complexing and hydration of the lanthanide ions on the regularity of variation in the extraction process was disoussed,更多还原