P204树脂和阳离子交换树脂分离Sc与裂变产物

P204对Sc有很好的分离选择性和分离能力，但由于反萃困难限制了其在Sc纯化中的应用。本工作研究了从裂变产物中分离纯化Sc的方法，建立流程如下：首先利用P204树脂对Sc的强萃取能力，将Sc与大量裂变产物分离，再通过灰化方法破坏树脂官能团，解决了吸附在P204树脂上的Sc难以解吸的问题，最后通过阳离子交换树脂实现Sc与残留Zr和Mo的分离，从而实现了Sc与裂变产物的分离。该方法对样品体积和酸度要求低，流程步骤操作简单。通过对模拟样品进行分析，Sc的回收率大于65%，对主要裂变产物的去污因子大于10³，适用于Sc与裂变产物的分离。

Separation of Sc From Fission Products by P204 Resin and Cation Exchange Resin

Although P204 provided good selectivity and possibility for Sc separation, complicated stripping was the main difficulty for the application in Sc purification. In the present work, a method for separation of Sc from fission products(FPs) was studied. Firstly, Sc is separated from major fission products by P204 resin because of high extraction rate of Sc. Secondly, P204 resin is destroyed by heating and then Sc could easily be stripped from P204 resin ash by nitric acid. Finally, Sc is separated from Mo and Zr by the cation exchange resin. The procedure is established with a recovery yield of Sc more than 65% and the decontamination factor of Sc over major FPs higher than 10³. The method is simple, stable and suitable for the sample in different acid concentrations and can be used for the separation of Sc from FPs.