荚醚从酸性溶液中萃取分离回收镧系/锕系元素，锶和铯

研究荚醚的组成、结构和萃取体系性质对裂片元素中的铯、锶、镧系和锕系的萃取能力和选择性的影响，寻找合成容易、毒性小的荚醚化合物，并在无需大伴阴离子的条件下萃取铯、锶、镧系和锕系的萃取剂，为开发有工业应用前景的从高放废液中分离回收铯，锶，镧系和锕系或用于湿法冶金的萃取体系提供理论和实验依据。

This task researched the properties of the amino podands for extract the actinides, especially minor actinides, lanthanides and some long live fissile elements from high level waste, sequentially dependent a new completely incinerable extractive system which may be applied in the partition-transmutation process for process the high level waste from reprocessing plant. The results show that using suitable amino podands extractant and diluents, these extractive systems effectively extract the minor actinides, lanthanides and Sr(II) etc. from wide acidity solutions, and can separate them each other, so amino podands can be used in the partition-transmutation process as extractant. In addition，these extractans be provided with chain length-radius effect, be propitious to apply as extractant for separate these elements which possess alike chemical properties such as rare earth and alkali earth elements. Then we developed a process for separation of alkali earth elements by solvent extraction process, which can be used to product high purity alkali ear