本文提出了以双(2-氨基乙基)醚为骨架的氨羧螯合剂类作为选择性螯合剂,更迭镧系元素的螯合物稳定常数序列,改进用阳离子交换法分离锕-镧系混合物的新设想。报道了该类络合剂DETAP N,N,N′-三乙酸-N′-3-丙酸-双-2-氨基乙基醚的合成方法、阴离子质子常数、它和镧系元素的络合物稳定常数。讨论了该离子交换法在分离锕-镧系元素上应用的可能性。 In this paper, we proposed a series of chelate stable constants of lanthanides by using amino-chelating agents with bis (2-aminoethyl) ether as the selective chelating agent, and improve the separation of actinide-lanthanide mixtures by cation exchange The new idea. The synthesis method of DETAP N, N, N’-triacetic acid-N’-3-propionic acid-bis-2-aminoethyl ether of this kind of complexing agent is reported. The anion proton constant, its complexation with lanthanide Stability constant. The possibility of this ion exchange method for the separation of actinides and lanthanides is discussed.