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前言离子交换法分离稀土元素已经有三、四十年的历史了,特别是近二十年来,在工业上大规模的使用离子交换法提取纯稀土元素,使它成为一种不可缺少的方法。虽然近年来由于采用了新的溶剂和新的方法,使溶剂萃取法分离稀土有了很大的发展,但目前制取单个高纯稀土元素,仍是采用离子交换法。就纯度而言,至今还没有任何一种方法能与它相比。稀土元素已经广泛的应用于各个部门,尤其是电视中用的萤光粉、激光材料等,需要高纯稀土氧化物。因此,要多快好省的生产出高纯稀土氧化物,以满足社会主义建设的需要,成为研究的重要课题。
Preface ion exchange separation of rare earth elements have been three or four decades of history, especially in the past two decades, the large-scale industrial use of ion exchange extraction of pure rare earth elements, making it an indispensable method. Although in recent years due to the use of new solvents and new methods to solvent extraction of rare earth separation has made great progress, but the current preparation of a single high-purity rare earth elements, is still using ion exchange method. As far as purity is concerned, there is no way to compare with it. Rare earth elements have been widely used in various sectors, especially the phosphor used in television, laser materials, etc., need high-purity rare earth oxides. Therefore, it is an important issue for us to study how to produce high-purity rare earth oxides in a more economical and efficient way to meet the needs of socialist construction.