本发明是关于选择性分离回收稀土元素特别是钐、铕和钆的方法。以前轻稀土镧和铈广泛用作光学玻璃原料和抛光材料。而重稀土钐、铕和钆的利用却很少。因此,对其分离和提纯的研究也不多。最近,随着电子工业的蓬勃发展,这些重稀土元素在半导体、萤光粉和磁体等方面的用途得到广泛地开发,同时对稀土的有效的分离方法和更高 The present invention relates to a method for the selective separation and recovery of rare earths, especially samarium, europium and gadolinium. Light rare earth lanthanum and cerium are widely used as optical glass raw materials and polishing materials. The use of heavy rare earth samarium, europium and gadolinium is very small. Therefore, there is not much research on its separation and purification. Recently, with the vigorous development of the electronics industry, the use of these heavy rare earth elements in the fields of semiconductors, phosphors and magnets has been extensively exploited, while effective methods of separation of rare earths and higher