Platinum-Catalyzed Reduction of U(Ⅵ) With Hydrazine in Nitric Acid Solutions

LI Bin; HE Hui; DING Bo-fa; ZHANG Qiu-yue; HUANG Xiao-hong; CHEN Yan-xin; TANG Hong-bin

doi:10.7538/hhxyfshx.2013.35.01.0024

LI Bin, HE Hui, DING Bo-fa, ZHANG Qiu-yue, HUANG Xiao-hong, CHEN Yan-xin, TANG Hong-bin. Platinum-Catalyzed Reduction of U(Ⅵ) With Hydrazine in Nitric Acid Solutions[J]. Journal of Nuclear and Radiochemistry, 2013, 35(1): 24-28. DOI: 10.7538/hhxyfshx.2013.35.01.0024

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Platinum-Catalyzed Reduction of U(Ⅵ) With Hydrazine in Nitric Acid Solutions

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The platinum-catalyzed reduction of U(Ⅵ) by hydrazine in HNO₃ solutions was studied. The influence of hydrazine concentration, acidity, catalyst amounts and temperature on the reduction reaction was investigated. The optimal process parameters for the reduction of c(U)=0.90mol/L(25mL) uranyl ion are 0.80mol/L HNO₃, 1.0mol/L N₂H₄ and 0.2g catalyst. More than 99% U(Ⅵ) is reduced in 3h at 60℃.

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Platinum-Catalyzed Reduction of U(Ⅵ) With Hydrazine in Nitric Acid Solutions

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