Solubilities, Densities and Refractive Indices in the Aqueous Quaternary System of Lithium Sulfate, Lithium Metaborate, and Lithium Carbonate at 288.15, 298.15, 308.15 K and 0.1 MPa

• DOI: 10.1021/acs.jced.6b00777
• Publication Date: 2016-12-25T02:47:12Z
• Authors: Yafei Guo; Long Li; Lina Cao; Xiaoping Yu; Shiqiang Wang; Tianlong Deng
• Keywords: Lithium sulfate; Lithium carbonate; Lithium borate; Lithium hydroxide

Solubilities, densities and refractive indices of the aqueous quaternary system lithium sulfate, metaborate, carbonate at 288.15, 298.15, 308.15 K 0.1 MPa were determined with isothermal dissolution method. According to experimental results, dry-salt phase diagrams, water-phase diagrams physicochemical properties including density, pH, index versus composition sulfate three temperatures plotted. In temperatures, there are four crystallization regions corresponding metaborate octahydrate (LiBO2·8H2O, LB), (Li2CO3, LC), monohydrate (Li2SO4·H2O, LS), univariant-solubility curves minerals LS, LB, LC, one invariant point coexisted (LS + LB LC). A comparison shows that areas decreased obviously area region is increased significantly increase temperature from 288.15 K. Physicochemical density in change regularly Li2SO4 (g/100 g·S) solution. With solution, first reach maximum values points then sharply. The calculated empirical equations good agreement values.