Thermodynamic Model and Experiment of Vacuum Distillation of Cadmium |
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| Authors: | WANG Lin-jun GUO Yan-ming SANG Wen-bin SHI Wei-min GU Yong-ming QIAN Yong-biao MIN Jia-hua WU Wen-hai JU Jian-hua XIA Yi-ben School of Material Science and Engineering Shanghai University Shanghai China |
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| Institution: | WANG Lin-jun,GUO Yan-ming,SANG Wen-bin,SHI Wei-min,GU Yong-ming,QIAN Yong-biao,MIN Jia-hua,WU Wen-hai JU Jian-hua,XIA Yi-ben School of Material Science and Engineering,Shanghai University,Shanghai 200072,China |
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| Abstract: | In this paper, a novel approach for highly efficient purification of cadmium by vacuum distillation was reported. During the cadmium vacuum distillation, a small quantity of cadmium oxide film, produced under lower vacuum, was intentionally induced into the evaporator. and the presence of cadmium oxide changed the behavior of impurities. Meantime, a thermodynamic model of the process, which described the phase composition in the evaporator and condenser during evaporation of cadmium, was established. The model was used to classify the impurities according to their behavior in the purification process. On the base of the model, the purification of cadmium by one-stage and two-stage distillation and the validity of the model were also discussed. |
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| Keywords: | cadmium purification vacuum distillation |
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