期刊
HYDROMETALLURGY
卷 89, 期 1-2, 页码 21-31出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2007.05.001
关键词
modeling; solubility; BET; phase diagram; hydrochloric acid; lithium-magnesium chloride; salting-out
The phase equilibrium of the HCl-LiCl-MgCl2-H2O system was simulated over a wide range of temperature and concentration by using an extended BET model. The experimental solubility and water activity in the binary HCl-H2O, LiCI-H2O, MgCl2-H2O and ternary HCl-LiCl-H2O, HCl-MgCl2-H2O and LiCl-MgCl2-H2O systems were used to obtain the model parameters. Then the solubility isotherms in the quaternary HCl-LiCl-MgCl2-H2O system were predicted and compared with the available experimental data. It was shown that the extended BET model with few model parameters can perfectly predict the solubility of the highly soluble quaternary HCl-LiCl-MgCl2-H2O system over a wide temperature range from 273 K to 413 K. The predicted phase diagram proved to be trustworthy and reliable for the industrial process design of separating MgCl2 from LiClcontaining natural brine using HCl as a salting-out agent. (c) 2007 Elsevier B.V. All rights reserved.
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