The evaporation coefficients alpha(i) of impurity elements Al, Cu, Cr, Co, Fe, Ni, Si in liquid scandium metal of purity 99.9% were measured at 1550 degrees C and 6.7 x 10(-3) Pa. The separating coefficients beta(i) a...The evaporation coefficients alpha(i) of impurity elements Al, Cu, Cr, Co, Fe, Ni, Si in liquid scandium metal of purity 99.9% were measured at 1550 degrees C and 6.7 x 10(-3) Pa. The separating coefficients beta(i) and activity coefficients gamma(i)(o) of these impurity elements were calculated and the separation possibility between these impurity elements and Sc was discussed from thermodynamics. Then the new technology in preparation of high purity scandium metal was proposed and its purification mechanism was discussed.展开更多
For boosting the research and development of distillation technology, the First China-USA Joint Conference on Distillation Technology (2004) will be held in Tianjin University on June 15-17, 2004. The conference is sp...For boosting the research and development of distillation technology, the First China-USA Joint Conference on Distillation Technology (2004) will be held in Tianjin University on June 15-17, 2004. The conference is sponsored by Separation Division of AIChE, National Natural Science Foundation of China, Chemical Industry and Engineering Society of China, and展开更多
For boosting the research and development of distillation technology, the First China-USA Joint Conference on Distillation Technology (2004) will be held in Tianjin University on June 15-17, 2004. The conference is sp...For boosting the research and development of distillation technology, the First China-USA Joint Conference on Distillation Technology (2004) will be held in Tianjin University on June 15-17, 2004. The conference is sponsored by Separation Division of AIChE, National Natural Science Foundation of China, Chemical Industry and Engineering Society of China, and展开更多
文摘The evaporation coefficients alpha(i) of impurity elements Al, Cu, Cr, Co, Fe, Ni, Si in liquid scandium metal of purity 99.9% were measured at 1550 degrees C and 6.7 x 10(-3) Pa. The separating coefficients beta(i) and activity coefficients gamma(i)(o) of these impurity elements were calculated and the separation possibility between these impurity elements and Sc was discussed from thermodynamics. Then the new technology in preparation of high purity scandium metal was proposed and its purification mechanism was discussed.
文摘For boosting the research and development of distillation technology, the First China-USA Joint Conference on Distillation Technology (2004) will be held in Tianjin University on June 15-17, 2004. The conference is sponsored by Separation Division of AIChE, National Natural Science Foundation of China, Chemical Industry and Engineering Society of China, and
文摘For boosting the research and development of distillation technology, the First China-USA Joint Conference on Distillation Technology (2004) will be held in Tianjin University on June 15-17, 2004. The conference is sponsored by Separation Division of AIChE, National Natural Science Foundation of China, Chemical Industry and Engineering Society of China, and
