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首页> 外文期刊>Russian Journal of Physical Chemistry >The Phase Diagram and Physicochemical Properties of the Quaternary System Li+, Rb+, Mg2(+)//Borate-H2O at 348 K
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The Phase Diagram and Physicochemical Properties of the Quaternary System Li+, Rb+, Mg2(+)//Borate-H2O at 348 K

机译：348 K四元体系Li +，Rb +，Mg2（+）//硼酸盐-H2O的相图和理化性质

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摘要

Pingluo underground brine, located in the west of China, is a high-grade deposit of lithium, potassium, rubidium, and borates. To study the ways of multipurpose utilization of this resource, the phase equilibrium of the system Li+, Rb+, Mg2+//borate-H2O was investigated at 348 K by an isothermal dissolution method. The solubilities of the components and physicochemical properties of equilibrated solutions, such as density and refractive index were determined. The stable phase diagram, the water content diagram and the physicochemical properties vs. composition diagrams were constructed according to the experimental data. The stable phase diagram consists of one invariant point, three isothermal dissolution curves and three crystallization fields corresponding to single salts MgB4O5(OH)(4) center dot 7H(2)O, RbB5O6(OH)(4) center dot 2H(2)O, and Li2B4O7 center dot 3H(2)O. The Li2B4O7 center dot 3H(2)O salt has the smallest crystallization region, whereas RbB5O6(OH)(4) center dot 2H(2)O occupies the largest part, so rubidium pentaborate can be more easily separated from solution than other coexisting salts of this system at 348 K.
机译：位于中国西部的平罗地下盐水是锂，钾，rub和硼酸盐的高级矿床。为了研究这种资源的多用途利用方式，采用等温溶解法研究了Li +，Rb +，Mg2 + //硼酸盐-H2O在348 K时的相平衡。确定了组分的溶解度和平衡溶液的理化性质，例如密度和折射率。根据实验数据建立了稳定相图，水含量图和理化性质与组成图。稳定相图包括一个不变点，三个等温溶解曲线和三个结晶场，分别对应于单个盐MgB4O5（OH）（4）中心点7H（2）O，RbB5O6（OH）（4）中心点2H（2） O和Li2B4O7中心点3H（2）O。 Li2B4O7中心点3H（2）O盐具有最小的结晶区域，而RbB5O6（OH）（4）中心点2H（2）O占最大部分，因此与其他共存盐相比，五硼酸rub更易于从溶液中分离该系统的功率为348K。

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