用溶剂萃取法萃取硝酸铀酰时,磷酸三丁酯(TBP)-煤油系统为最常用有机相之一,不论在硝酸铀酰粗制品之纯化及铀裂变产物之分离方面,均有其广阔之用途。但在使用循环次数较多后,此一溶剂系统即发生一些缺点:如分离能力减低,夹带增多,萃取过程中的乳化现象严重等等。国外研究单位对于此溶剂系统在使用过程中发生的一些问题的研究,近年来陆续有 TBP-kerosene system is one of the most commonly used organic phases when extracting uranyl nitrate by solvent extraction, both in the purification of crude uranyl nitrate and in the separation of uranium fission products use. However, after more cycles are used, there are some disadvantages with this solvent system, such as reduced separation capacity, increased entrainment, serious emulsification during extraction, and the like. Foreign research units for the solvent system in the course of some of the problems that occurred in recent years, one after another