Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (09): 835-837.doi: 10.3866/PKU.WHXB20020914

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Equilibrium Phase Diagram of Li,Na∥,CO32-,B4O72--H2O Quaternary System at 288 K

Sang Shi-Hua;Yin Hui-An;Tang Ming-Lin;Zhang Yun-Xiang   

  1. Institute of Chemical Engineering, Sichuan University, Chengdu 610064;Department of Applied Chemistry, Chengdu
  • Received:2001-12-05 Revised:2002-03-20 Published:2002-09-15
  • Contact: Sang Shi-Hua E-mail:cditch@sina.com.cn

Abstract: In this paper, the solubility of Li+,Na+∥,CO32-,B4O72--H2O quaternary system at 288 K has been determined by isothermal equilibrium method. Based on the solubility data, the phase diagram of the system has also been plotted, in which there are two invariant point E and F(see Fig.1), five univariant curves E1F, E2F, E3E, E4E and EF, and four crystallization fields: Na2CO3•10H2O,Li2B4O7•3H2O,Na2B4O7•10H2O, Li2CO3.

Key words: Salt-water system, Phase equilibrium, Borate