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苯并-15-冠-5(B-15-C-5)和二苯并-18-冠-6(DB-18-C-6)应用于金属离子的萃取分离已有许多报道,但In~(3+)电荷数高、离子半径小、水合能较大,因此很难用B-15-C-5和DB-18-C-6萃取,有关这方面的工作迄今未见报道. 本文用斜率法、饱和法以及通过与萃合物相对应的冠醚配合物品体的制备及其性质研究,探讨了In~(3+)的萃取机理,测定并计算了表观萃取平衡常数K′_(ex).将此萃取体系应用于In~(3+)和某些金属离子的萃取分离,亦获得较好的结果.
There have been a lot of reports on the extraction and separation of metal ions using benzo-15-crown-5 (B-15-C-5) and dibenzo-18-crown-6 Therefore, it has been difficult to extract B-15-C-5 and DB-18-C-6, so far, no work has been reported in this field. The extraction mechanism of In ~ (3+) was discussed by using the slope method, the saturation method and the preparation of the crown ether complex corresponding to the extract and its properties. The apparent extraction equilibrium constant K ’ _ (ex). The extraction system is applied to the extraction and separation of In ~ (3+) and some metal ions, and also obtains better results.