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MA分離のための新規抽出剤の開発

Examination of novel extractants for MA separation

鈴木 英哉; 津幡 靖宏   ; 松村 達郎  

Suzuki, Hideya; Tsubata, Yasuhiro; Matsumura, Tatsuro

MA(III)分離のための新規抽出剤アルキルジアミドアミン(ADAAM)を開発した。ADAAMは、ソフトなNドナーとハードなOドナーを有するハイブリッド配位子である。多座配位子ADAAMの持つ分子構造により、高酸濃度条件下において、Am(III)とCm(III)との分離係数5.5が得られた。さらに、2-エチルヘキシル基を持つADAAM(EH)を用いて、多段向流式ミキサセトラによる連続抽出試験を実施し、Am(III)とCm(III)との良好な分離に成功した。

Alkyl diamide amine (ADAAM) was investigated for the separation of MA(III). ADAAM is a multidentate ligand comprising one soft N-donor atom and two hard O-donor atoms as part of its central frame. This tridentate set of donor atoms provide selective binding for Am(III) and Cm(III) in highly acidic media and yield separation factors of up to 5.5. A continuous liquid-liquid extraction and stripping test was performed using ADAAM(EH) in n-dodecane as the extractant in a multistage countercurrent mixer-settler extractor. Separation of Am(III) and Cm(III) in very high yield was demonstrated.

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