Solid–Liquid Phase Equilibria in Ternary Aqueous Systems (LiB5O8 + KB5O8 + H2O) and (LiB5O8 + NaB5O8 + H2O) at 288.15 K and 0.1 MPa

IF 1.8 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR
Jia-Yue Wang, Yan Chen, Sen-Jian Han, Ya-Fei Guo, Shi-Qiang Wang
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Abstract

To achieve efficient separation of alkali metal borate resources from the brines of the salt lake to provide a theoretical basis, this paper adopts the isothermal dissolution equilibrium method to study the solid-liquid phase equilibrium and phase diagram of the ternary system (LiB5O8 + KB5O8 + H2O) and (LiB5O8 + NaB5O8 + H2O) at 288.15 K. The study grasps the changing law of solubility and physicochemical properties of the system, as well as analyses and identifies the solid phase in stable equilibrium. The results show that the stable phase diagrams of the two ternary systems at 288.15 K are of the simple eutectic type, containing one invariant point, two univariate saturated solubility curves, and two crystalline regions. Among them, the crystalline region of LiB5O8·5H2O is the smallest, indicating that it is not easy to precipitate from the saturated liquid phase, and the density and refractive index curves of each system show regular changes with the increase of LiB5O8 content.

Abstract Image

在288.15 K和0.1 MPa下三元水体系(LiB5O8 + KB5O8 + H2O)和(LiB5O8 + NaB5O8 + H2O)的固液平衡
为实现盐湖卤水中碱金属硼酸盐资源的高效分离提供理论依据,本文采用等温溶解平衡法研究了三元体系(LiB5O8 + KB5O8 + H2O)和(LiB5O8 + NaB5O8 + H2O)在288.15 K下的固液平衡和相图。本研究掌握了体系溶解度和理化性质的变化规律,并对处于稳定平衡状态的固相进行了分析和鉴定。结果表明:在288.15 K时,两种三元体系的稳定相图均为简单共晶型,包含一个不变点、两条单变量饱和溶解度曲线和两个结晶区。其中,LiB5O8·5H2O的结晶区最小,表明其不易从饱和液相析出,且各体系的密度和折射率曲线随LiB5O8含量的增加呈现规律性变化。
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来源期刊
Russian Journal of Inorganic Chemistry
Russian Journal of Inorganic Chemistry 化学-无机化学与核化学
CiteScore
3.10
自引率
38.10%
发文量
237
审稿时长
3 months
期刊介绍: Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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