Mutual separation of Am and Cm using ADAAM (alkyl DiAmide AMine) and reduction of volumes for liquid waste generated via batch-wise multistage extractions

アルキルジアミドアミン(ADAAM)を使ったバッチ式多段抽出法によるAmとCmの相互分離と水相、有機相体積削減

佐々木 祐二  ; 金子 政志   ; 伴 康俊  ; 鈴木 英哉*

Sasaki, Yuji; Kaneko, Masashi; Ban, Yasutoshi; Suzuki, Hideya*

アルキルジアミドアミン(ADAAM)を使ったAm/Cm相互分離を行った。ADAAMは硝酸-ドデカン系で非常に高いAm/Cm分離比5.9を示した。1.5M硝酸-0.2M ADAAM条件を用いる多段抽出で抽出後の有機相中にAm 96.5%、Cm 1.06%回収できることを確認した。Am/Cm相互分離後に発生した水相、有機相体積削減のための付加的な多段抽出を行い、Am, Cmを2, 3段の水相に濃縮できることを確認した。

The mutual separation of Am and Cm is conducted using an alkyl-diamide amine (ADAAM) extractant. ADAAM exhibits extremely high separation factor with respect to Am and Cm separation (5.9) in a nitric acid--dodecane system. The batch-wise multistage extractions are performed using a system containing 0.2 M ADAAM and 1.5 M nitric acid. In this multistage extraction, an organic solvent give 96.5% and 1.06% yields of Am and Cm. After the mutual separation of Am and Cm, an additional extraction step is included to reduce the volumes of these aqueous and organic phases. Taking these steps, Am and Cm can be recovered in just two or three stages in the aqueous phases.