SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2014, Vol. 22 ›› Issue (3): 294-298.DOI: 10.1016/S1004-9541(14)60044-6

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

LIU Xuefeng1, LI Jun1, LUO Jianhong1, ZHOU Kun2, YANG Zhaopeng1   

  1. 1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2 College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
  • Received:2012-08-28 Revised:2013-04-05 Online:2014-03-05 Published:2014-03-28
  • Contact: LI Jun

Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

刘雪峰1, 李军1, 罗建洪1, 周堃2, 杨兆鹏1   

  1. 1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2 College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
  • 通讯作者: LI Jun

Abstract: The present work is focused on the relationship between effective segregation coefficient keff and temperature of melting zone for purification of phosphorus by zone melting method. Values of keff at four temperatures of melting zone are obtained for zone pass n =1 at travel velocity of molten zone v =5×10-3 m·h-1 and initial impurity concentration C0≤10 μg·g-1. lnkeff is a linear function of 1/T. The keff values of Al, Ca, Cr, Fe, Cd and Sb increase with temperatures while that of Mg is almost constant. The purification is acceptable at lower temperature of melting zone such as 323 K. The variations of enthalpy and entropy between impurities and phosphorus in the liquid and solid phases are also presented.

Key words: phosphorus, purity, temperature, effective segregation coefficient, zone melting

摘要: The present work is focused on the relationship between effective segregation coefficient keff and temperature of melting zone for purification of phosphorus by zone melting method. Values of keff at four temperatures of melting zone are obtained for zone pass n =1 at travel velocity of molten zone v =5×10-3 m·h-1 and initial impurity concentration C0≤10 μg·g-1. lnkeff is a linear function of 1/T. The keff values of Al, Ca, Cr, Fe, Cd and Sb increase with temperatures while that of Mg is almost constant. The purification is acceptable at lower temperature of melting zone such as 323 K. The variations of enthalpy and entropy between impurities and phosphorus in the liquid and solid phases are also presented.

关键词: phosphorus, purity, temperature, effective segregation coefficient, zone melting