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Recovery of U and Pu from nitric acid using ${it N,N}$-di(2-ethylhexyl)butanamide (DEHBA) in mixer-settler extractors

${it N,N}$-ジ(2-エチルヘキシル)ブタンアミド(DEHBA)を用いたミキサセトラ抽出器による硝酸溶液中のU及びPuの回収

伴 康俊; 宝徳 忍; 津幡 靖宏 ; 森田 泰治

Ban, Yasutoshi; Hotoku, Shinobu; Tsubata, Yasuhiro; Morita, Yasuji

モノアミド抽出剤の一つである${it N,N}$-ジ(2-エチルヘキシル)ブタンアミド(DEHBA)を用いた、ミキサセトラ抽出器による硝酸溶液からのUとPuの回収率のシミュレーション計算、及びUとPuの回収試験をそれぞれ実施した。ミキサセトラへの単位時間あたりの溶液供給量、ミキサセトラの段数、及び硝酸濃度をシミュレーション計算のパラメータに設定し、UとPuの分離に対する適切な試験条件を決定した。試験の結果、1.5mol/dm$$^{3}$$(M)のDEHBAによる4M硝酸中のU及びPuの回収率として$$>$$99.9%及び97.84%をそれぞれ得た。

The recovery of U and Pu from nitric acid using the monoamide extractant ${it N,N}$-di(2-ethylhexyl)butanamide (DEHBA) in mixer-settler extractors was calculated using a simulation code, and a continuous counter-current experiment using mixer-settler extractors was performed. The flow rate, stage number, and nitric acid concentration were chosen as the parameters for the calculation, and the appropriate experimental conditions for separating U from Pu were determined. The results of the continuous counter-current experiment showed that the percentages of U and Pu extracted using 1.5 mol/dm$$^{3}$$ (M) DEHBA from 4 M nitric acid were $$>$$99.9% and 97.84%, respectively.

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パーセンタイル:67.41

分野:Chemistry, Multidisciplinary

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