本文研究了以三-正辛基甲基硝酸铵的二甲苯溶液作萃取剂,以硝酸铵作盐析剂,从稀土硝酸盐溶液中萃取稀土元素的工艺。萃取剂的萃取容量随原子序数的增大而降低。对全部稀土元素的萃取方案是假设单一萃取剂同稀土元素反应并分成二段逐级萃取而提出来的。 萃取中,低负载时基本上生成1∶5的络合物,而 In this paper, three-n-octyl methyl ammonium nitrate solution as an extractant xylene, ammonium nitrate as a salting-out agent, rare earth nitrate extraction rare earth elements from the process. Extractant extraction capacity decreases with increasing atomic number. The extraction of all rare earth elements is based on the assumption that the single extractant reacts with the rare earth element and is split into two stages of stepwise extraction. Extraction, low load basically generate 1: 5 complexes, and