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合成了6个具有高位阻特征的烃基膦酸单十六烷基酯萃取剂,并考察了它们对Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Fe(Ⅲ)和Ca的萃取性能。萃取剂分子中烃基结构的变化对各种金属离子的萃取能力有着不同程度的影响。空间位阻较大的异丙基和环己基化合物具有比2-乙基己基膦酸单2-乙基己基酯(P507)更高的Co-Ni分离能力。
Six new hexadecyl hydrocarbylphosphonates with high steric hindrance were synthesized and their effects on the extraction of Co (Ⅱ), Ni (Ⅱ), Cu (Ⅱ), Fe (Ⅲ) and Ca . The change of hydrocarbyl structure in extractant molecule has different degrees of influence on the extraction ability of various metal ions. The sterically hindered isopropyl and cyclohexyl compounds have higher Co-Ni separation capabilities than mono-2-ethylhexyl 2-ethylhexylphosphonate (P507).