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本文研究了 4-叔丁基苯并-15-冠-5(t-BBC)和4-溴苯并-15-冠-5(BrBC)的硝基苯溶液对七个镧系元素的萃取(苦味酸根为伴随离子),其萃取分配比次序为CeEu>Tm>Yb>Lu;计算了平均分离因数。萃合物的组成可能是Ln(t-BBC)_2Pi_3。以氯仿作稀释剂时分配比很低。以BrBC代替t-BBC作萃取剂时分配比约低一倍。
In this paper, the extraction of seven lanthanides from nitrobenzene solutions of 4-tert-butylbenzo-15-crown-5 (t-BBC) and 4- bromobenz-15-crown- Picrate is a concomitant ion), the order of extraction and distribution is Ce Eu> Tm> Yb> Lu. The average separation factor is calculated. The composition of the complex may be Ln (t-BBC) _2Pi_3. When using chloroform as diluent, the distribution ratio is very low. When using BrBC instead of t-BBC as extractant, the distribution ratio is about doubled.