本文研究了PMBP-CHCl_2与Ln(NO_3)_3-H_2O(Ln=La、Ce、Eu、Yb和Lu)的作用。发现,当PMBP浓度≥0.2M时,分配比与氢离子浓度的三次方成反比,与PMBP浓度的四次方成正比,全部稀土离子以LnA_3·HA;形式被萃入有机相,其萃取平衡常数(lgK)分别为La(-6.20)、Ce(-4.30)Eu(-3.62)、Yb(-2.90)及 Lu(-3.20)。 在萃取条件下,除Pm未经研究外,其余三价稀土元素经萃取后,从有机相都获得了与PMBP形成的固态络合物,其组成除Lu外均为LnA_3·HA,并对它们的晶形、红外光谱和热谱进行了研究。 In this paper, the effects of PMBP-CHCl_2 and Ln (NO_3) _3-H_2O (Ln = La, Ce, Eu, Yb and Lu) were studied. It is found that when the concentration of PMBP is ≥0.2M, the distribution ratio is inversely proportional to the third power of hydrogen ion concentration and is proportional to the fourth power of PMBP concentration. All the rare earth ions are extracted into the organic phase in the form of LnA_3 · HA; the extraction equilibrium The constants (lgK) are La (-6.20), Ce (-4.30) Eu (-3.62), Yb (-2.90) and Lu (-3.20), respectively. Under the extraction conditions, all the trivalent rare earth elements except the Pm have not been studied, and the solid complexes with PMBP are obtained from the organic phase. The composition of the complexes is LnA_3 · HA except Lu, The crystal form, infrared spectrum and heat spectrum were studied.