Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (08): 1285-1287.doi: 10.3866/PKU.WHXB20070828

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Metastable Equilibrium Solubilities of Solutions in the Quaternary System of K2B4O7-Na2B4O7-Li2B4O7-H2O at 273 K

SANG Shi-Hua; YIN Hui-An; NI Shi-Jun; ZHANG Cheng-Jiang   

  1. Institute of Materials and Chemistry & Chemical Engineering, Chengdu 610059, P. R. China; Department of Geochemistry, Chengdu University of Technology, Chengdu 610059, P. R. China
  • Received:2007-02-26 Revised:2007-04-27 Published:2007-08-03
  • Contact: SANG Shi-Hua E-mail:sangsh@cdut.edu.cn, sangshihua@sina.com.cn

Abstract: Metastable equilibrium solubilities and densities of the quaternary system of K2B4O7-Na2B4O7-Li2B4O7-H2O at 273 K were studied by isothermal evaporation method. Based on the solubility data, the metastable equilibrium phase diagramof the systemwas plotted, which consists of one invariant point E; three univariant curves E1E, E2E, and E3E, three crystallization fields Na2B4O7·10H2O , K2B4O7·4H2O, and LiBO2·8H2O. Potassium borate (K2B4O7) had the largest solubility in the system.

Key words: Salt-water system, Metastable phase equilibrium, Borate

MSC2000: 

  • O642