模拟镎钚溶液的微波浓缩转型
Concentration and Coversion of Simulated Np-Pu Solution by Microwave Method
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摘要: 用Zr模拟镎钚元素与硝酸、草酸等组成溶液，通过比较微波和油浴减压蒸馏两种加热方式，获得了模拟镎钚的反萃液浓缩转型的工艺参数。主要转型方式为高温浓缩溶液后得到的固体再进行煅烧，使模拟镎钚的反萃液转型为氧化物。借助XRD、BET等分析测试方法对氧化物的性能进行了研究。实验结果表明：微波减压蒸馏比油浴减压蒸馏法减少了浓缩时间，馏出的硝酸可循环使用。微波浓缩得到的固体煅烧后的氧化物比表面积大，易于后续固化研究。Abstract: The process parameters of simulated solution of NpPu changing into oxides were obtained by two reduced pressure distillation methods, microwave heating method and oilbath method, and the simulated solution contains of HNO3, H2C2O4 and Zr. The oxides was gained by the method that the concentrated solution is dried and ignited. The properties of oxides were investigated by means of Xray diffraction analysis and surface analysis. The results show that the microwave heating reduced pressure distillation method can shorten concentrating time significantly than oilbath heating method, and the distilled nitric acid can be reused. The oxide obtained by microwave process has large surface area, facilitating the subsequent immobilization study more easy.
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Keywords:
- microwave /
- reduced pressure distillation /
- HNO3 /
- recycle
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