Inorganic Chemicals Industry ›› 2019, Vol. 51 ›› Issue (5): 70-73.

• Chemical Analysis & Testing • Previous Articles     Next Articles

Determination and correlation of solubility of boric acid in calcium chloride solution

Chen Lifang1,2,Zhang Qinqin1,2,Lin Tian1,Yue Peiying1   

  1. 1. College of Chemical Engineering and Materials,Tianjin University of Science & Technology,Tianjin 300457,China
    2. Tianjin Key Laboratory of Marine Resources and Chemistry
  • Received:2018-11-11 Online:2019-05-10 Published:2020-04-28

Abstract:

The solubility of boric acid in calcium chloride solution with different concentration was determined by the static equilibrium method in the temperature range at 298.15~343.15 K.The experimental data was correlated by Apelblat equation,empirical equation and λh equation.The results showed that the solubility of boric acid decreased with the increase of calcium chloride concentration and increased with the increase of temperature.The above three kinds of models could be used for the relationship between the solubility of boric acid and temperature in calcium chloride solution.The fitting correlation coefficients of the Apelblat equation and the empirical equation were both above 0.99,and the fitting coefficient of the λh equation was above 0.98.The determination and correlation of boric acid solubility in calcium chloride solution provided important solid liquid equilibrium data for the cool crystallization and separated purification of boric acid in calcium chloride solution.It was of great significance to the research of boron extraction process by halogen precipitation.

Key words: boric acid, calcium chloride, solubility

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