萃取有机相的微结构和性质的研究

Abstract

本文用FTIR,荧光,ICP/AES等方法研究了含稀土的HDEHP[二(2-乙基己基)磷酸,HA]-正庚烷的萃取有机相的结构和聚集态.结果表明:(1)不同稀土离子与萃取剂的配位能力不一样,La<Nd<Eu;(2)随着稀土负载量的增加,萃取有机相中水含量降低,W/O型微乳状液遭到破坏;(3)稀土萃合物和酸性磷酸酯在有机相中不形成混合胶团;(4)含稀土的HDEHP的萃取有机相是一种“复杂流体”,具有多种聚集态和结构.

Extracted organic phases of HDEHP [di(2-ethylhexyl) phosphoric acid] containing lanthanide ions have been characterized by FTIR, fluorescence and ICP/AES spectroscopic measurements. The result demonstrates that (1) the water content in extracted organic phase decreases as the loading percentage of lanthanide increases; (2) The fluorescence investigation displays no mixed micelle of Na (or K)-HDEHP and Re-HDEHP formed in the organic phase; (3) The extracted organic phase is a sort of complex fluid, which has multiple aggregation states and different microstructures.