TBP对部分皂化的DMHPA-正庚烷体系及萃取稀土有机相的影响

THE INFLUENCES OF TBP ON THE PARTIALLY SAPONIFIED DMHPAHEPTANE SYSTEMS AND THE EXTRACTED ORGANIC PHASES CONTAINING RARE EARTH

研究了部分皂化的二（１甲基庚基）磷酸（ＤＭＨＰＡ）磷酸三丁酯（ＴＢＰ）—正庚烷（Ｃ７Ｈ１６）体系及萃取稀土有机相的聚集状态。结果表明，ＴＢＰ可以扩大ＤＭＨＰＡＣ７Ｈ１６Ｈ２Ｏ微乳状液形成的区间，并且对萃取有机相的存在状态及水的行为有明显的影响，在一定的条件下有凝胶形成。ＦＴＩＲ光谱分析表明，该类凝胶中ＤＭＨＰＡ和ＴＢＰ与稀土离子以多种形式配位，ＴＢＰ与ＤＭＨＰＡ及水的氢键结合对凝胶网状结构的形成也起了一定的作用。

The aggregation states of partially saponified [di(1methylheptyl) phosphoric acid](DMHPA)tributyl phosphate(TBP)heptane(C7H16) and the extracted organic phases containing rare earth were studied.The result demonstrates that TBP can widen the range of the microemulsion formation in DMHPAC7H16NaOHH2O systems.It also influence the states of the extracted organic phases of DMHPARE(Ⅲ) and the behavior of water clearly.The gel could be formed in DMHPATBPRE(Ⅲ) systems under proper conditions.FTIR spectra analysis shows that both DMHPA and TBP may coordinate with RE3+ and the hydrogen bonds of TBP with DMHPA and H2O contribute to the three dimensional network structrue of the gels.