杯[8]芳烃衍生物的合成及其对镧、铈离子萃取分离研究

Study on Synthesis of Calix[8]arene Derivatives and their Performance for La and Ce Extraction Separation

通过取代反应一步合成了一类对轻稀土离子萃取效率高,且具有一定选择性的杯[8]芳烃磷酸酯衍生物。研究结果表明,杯[8]芳烃磷酸酯衍生物对轻稀土La和Ce离子的萃取率可高达98%;与杯[8]芳烃相比,在相同条件下萃取率可提高10%。在一定的萃取条件下,杯[8]芳烃磷酸酯衍生物对La的萃取率比对Ce的萃取率高6%。若利用多级离心萃取分馏,可望实现对La和Ce离子的高效萃取分离。

A series of calix]-8]arene phosphate derivatives with high extraction efficiency to light rare earth ions and a certain selectivity were synthesized by one step of substitution reaction. The results show that the extraction ratio of La and Ce light rare earth is up to 98% with the calix[8]arene phosphate derivatives,10% higher than that with calix[8-]arene. Under the same conditions and with the calix[8]arene phosphate derivatives,La extraction ratio is 6 % higher than Ce extraction ratio. Efficient extraction separa- tion of La and Ce ions can be achieved by multi-stage centrifugal extraction fractionation.