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Solid–Liquid Phase Equilibria in the Ternary Systems (LiBO2 + NaBO2 + H2O) and (LiBO2 + KBO2 + H2O) at 288.15 K and 0.1 MPa
Journal of Solution Chemistry ( IF 1.2 ) Pub Date : 2020-03-01 , DOI: 10.1007/s10953-020-00962-8
Shiqiang Wang , Chuncheng Shi , Juan Yang , Yafei Guo , Tianlong Deng

Solid–liquid phase equilibria for the two aqueous systems (LiBO2 + NaBO2 + H2O) and (LiBO2 + KBO2 + H2O) at T = 288.15 K and p = 0.1 MPa were determined using the isothermal dissolution equilibrium method. The experimental results show that the phase diagrams consist of one two-salt co-saturated invariant point, two univariant solubility isotherms, and three crystallization fields. The two systems belong to simple co-saturated type, and neither double salt nor solid solution were found. The densities change regularly as the sodium metaborate (potassium metaborate) concentration increases in solution, and reach their maximum values at the invariant point. Based on the Pitzer and its extended Harvie–Møller–Weare (HMW) model, the solubilities for the ternary systems at 288.15 K were represented, and the calculated results agree well with the experimental values.

中文翻译:

三元系统 (LiBO2 + NaBO2 + H2O) 和 (LiBO2 + KBO2 + H2O) 在 288.15 K 和 0.1 MPa 中的固液相平衡

使用等温溶解平衡法确定了在 T = 288.15 K 和 p = 0.1 MPa 时两种水体系 (LiBO2 + NaBO2 + H2O) 和 (LiBO2 + KBO2 + H2O) 的固液相平衡。实验结果表明,相图由一个双盐共饱和不变点、两条单变溶解度等温线和三个结晶场组成。两种体系均属于简单共饱和型,未发现复盐和固溶体。密度随着溶液中偏硼酸钠(偏硼酸钾)浓度的增加而有规律地变化,并在不变点处达到最大值。基于 Pitzer 及其扩展的 Harvie-Møller-Weare (HMW) 模型,表示了三元系统在 288.15 K 下的溶解度,
更新日期:2020-03-01
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