超临界流体具有传质速度快、溶解能力强等特点。在萃取金属离子时,只需添加少量的络合剂就可取得很好的萃取效果,因此同传统的溶剂萃取相比,减少了二次废物的产生,降低了对环境的污染。本工作开展超临界CO2流体萃取Ce的条件研究,从而为超临界流体萃取Pu奠定基础。本工作首先建立了超临界CO2流体萃取Ce(Ⅳ)的实验方法。在玻璃盘(?20 mm)中加入0.5 mL Ce(Ⅳ)溶液,放置在萃取釜底部;在托盘(φ20 mm)中加入0.05 g TOPO络合剂,放置在萃取釜支 Supercritical fluid with mass transfer speed, dissolving ability and so on. In the extraction of metal ions, only a small amount of complexing agent can be added to obtain a good extraction effect, so compared with the traditional solvent extraction, reducing the secondary waste generation and reduce environmental pollution. This work to carry out supercritical CO2 fluid extraction Ce conditions, and thus Pu for the supercritical fluid extraction foundation. This work first established a supercritical CO2 fluid extraction Ce (Ⅳ) experimental method. Add 0.5 mL of Ce (IV) solution to a glass dish (? 20 mm) and place it on the bottom of the extraction vessel. Add 0.05 g of TOPO complexing agent to the tray (? 20 mm)