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Solid-liquid phase equilibria in quaternary system lithium borate-potassium borate-magnesium borate-water at 308.15 K
Received date: 2019-11-25
Online published: 2020-05-21
The phase equilibrium of the quaternary system lithium borate-potassium borate-magnesium borate-water was studied at 308.15 K with isothermal solution saturation method.Solubilities,densities,refractive indices and pH of the system were determined.Stability phase diagram of this system contains one invariant point L+Li2B4O7·3H2O+K2B4O7·4H2O+Mg2B6O11·15H2O） which liquid compositions were as follows：w（Li2B4O7）=3.11%,w（K2B4O7）=16.64% and w（Mg2B6O11）=0.10%; and three crystallization regions corresponding to Li2B4O7·3H2O,K2B4O7·4H2O and Mg2B6O11·15H2O,respectively. Neither double salts nor solid solutions formed in this system,and the K2B4O7 and Li2B4O7 in solution both had a strong salting-out effect on inderite.The solution density,refractive index and pH of the quaternary system changes regularly with the increasing of borate concentration.
Jukui Wang , Xingfeng Dong , Dong Zhao , Shiqiang Wang , Yafei Guo , Tianlong Deng . Solid-liquid phase equilibria in quaternary system lithium borate-potassium borate-magnesium borate-water at 308.15 K[J]. Inorganic Chemicals Industry, 2020 , 52(5) : 27 -30 . DOI: 10.11962/1006-4990.2019-0402
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