Evaluation of two-phase separation in ,-di(2-ethylhexyl)butanamide-nitric acid systems using turbidity measurements

濁度測定を用いた,-ジ(2-エチルヘキシル)ブタンアミド-硝酸系の二相分離評価

筒井 菜緒  ; 伴 康俊  ; 袴塚 保之; 松村 達郎  

Tsutsui, Nao; Ban, Yasutoshi; Hakamatsuka, Yasuyuki; Matsumura, Tatsuro

濁度測定を用いて-ドデカンで希釈した,-ジ(2-エチルヘキシル)ブタンアミド(DEHBA)及びリン酸トリブチル(TBP)と硝酸中の硝酸ウラニル溶液の二相分離の定量評価を行った。DEHBAの濁度は高い硝酸濃度において比較的高かった一方、TBPの濁度は硝酸濃度に関わらず速やかに減少した。高濃度のDEHBA、硝酸、ウランは有機相中の濁度を増加させるが、これは粘度の増加に起因すると考えられる。ウランの分配比測定からは、ある一定値以下では濁度はウラン分配比に影響を与えないことが示唆された。

Quantitative evaluation of the two-phase separation between ,-di(2-ethylhexyl)butanamide (DEHBA) and tri--butyl phosphate (TBP) diluted with -dodecane and uranyl nitrate solution in nitric acid medium was achieved using turbidity measurements. The turbidities of DEHBA were relatively high, particularly at high DEHBA concentrations, while that of TBP rapidly decreased irrespective of nitric acid concentration. A high concentration of DEHBA, nitric acid, and uranium increased the turbidities in the organic phase, which could be ascribed to the increase in viscosity. Distribution ratios of uranium were also measured, and it was indicated that turbidity did not have a critical effect on the distribution ratio when the turbidity was below a certain value.