我国稀土资源非常丰富,围绕稀土资源的开发利用进行应用研究和理论研究,正在化工、化学、冶金等领域蓬勃开展。冠醚是一类大环多元醚,是近年发展起来的一类有机配体,它对稀土金属阳离子有很强的配位能力。研究稀土冠醚配合物的组成、性质和制备,有重要的实际意义和理论意义。关于稀土冠醚配合物的制备,一般都是在一定溶剂中按某种摩尔比混合盐和醚而得到固体配合物,这种方法在条件的选择上有一定的盲目性。为了探讨配合物稳定组成的理论依据,我们开展了稀土盐—冠醚—有机溶剂三元体系溶度的系统研究。本文报 China’s rare earth resources are very rich, the application of the research and theoretical research on the development and utilization of rare earth resources, is vigorously carried out in the chemical, chemical, metallurgical and other fields. Crown ether is a kind of macrocyclic polyether, which is a type of organic ligand developed in recent years. It has a strong coordination ability to rare earth metal cations. Studying the composition, properties and preparation of rare earth crown ether complexes has important practical and theoretical significance. On the preparation of rare earth crown ether complexes, usually in a certain solvent by a certain molar ratio of salt and ether mixed to obtain a solid complex, this method in terms of the choice of a certain degree of blindness. In order to investigate the theoretical basis of the stable composition of the complex, we carried out a systematic study on the solubility of ternary system of rare earth salt-crown ether-organic solvent. This article reported