| 肼为还原剂催化还原U(Ⅵ)制备U(Ⅳ)的工艺条件 |
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| 引用本文： | 李斌,何辉,丁伯发,张秋月,黄小红,陈延鑫,唐洪彬.肼为还原剂催化还原U(Ⅵ)制备U(Ⅳ)的工艺条件[J].核化学与放射化学,2013,35(1):24-28. |
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| 作者姓名： | 李斌 何辉 丁伯发 张秋月 黄小红 陈延鑫 唐洪彬 |
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| 作者单位： | 中国原子能科学研究院 放射化学研究所，北京102413 |
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| 摘 要： | 研究了硝酸体系中以铂黑为催化剂、肼为还原剂还原制备U(Ⅳ)的工艺条件，考察了硝酸浓度、肼浓度、反应温度、催化剂用量等对U(Ⅵ)转化率及副反应的影响。当铀浓度为0.90mol/L时，优化的工艺条件为：初始硝酸浓度0.80mol/L，初始肼浓度1.0mol/L左右，反应温度60℃，反应液25mL时催化剂铂黑用量为0.2g，反应3h后U(Ⅵ)的转化率大于99%。
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| 关 键 词： | 肼 铂黑 U(Ⅳ) 催化还原 |
Platinum-Catalyzed Reduction of U(Ⅵ) With Hydrazine in Nitric Acid Solutions |
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| 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. |
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| Authors: | LI Bin HE Hui DING Bo-fa ZHANG Qiu-yue HUANG Xiao-hong CHEN Yan-xin TANG Hong-bin |
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| Affiliation: | China Institute of Atomic Energy, P. O. Box 275(26), Beijing 102413, China |
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| Abstract: | 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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| Keywords: | hydrazine platinum black U(Ⅳ catalytic reaction |
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