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本文研究用一个酸性螯合草取剂HPMBP(HA)与一个液体离子交换剂三辛胺高氟酸盐HTOA~+,ClO_4~-体系协同萃取稀土元素Pr(111)及Nd(111),旨在探索其协萃机理以及此体系能否用于稀土分离。在以甲苯为溶剂水相用Na(H)ClO_4维持离子强度为0.1、pH=4条件下,用斜率法证明协萃平衡如下: 用HPMBP单独车取镨、钕时,分离系数β_(Nd/Pr)等于1.175,而协同萃取时则增大至1.45。
In this paper, we studied the synergistic extraction of rare earth elements Pr (111) and Nd (111) with an acid chelating herbicide HPMBP (HA) and a liquid ion exchanger TCA / HTO + In exploring its extraction mechanism and the system can be used for rare earth separation. When the ionic strength of Na (H) ClO_4 was maintained at 0.1 and pH = 4 with toluene as the solvent, the slope equilibrium method was used to prove the equilibrium balance as follows: When praseodymium and neodymium were separated by HPMBP, the separation coefficient β_ (Nd / Pr) is equal to 1.175, while the synergistic extraction is increased to 1.45.