Phase Equilibria in the Ternary Systems Li2B4O7–MgB4O7–H2O and K2B4O7–MgB4O7–H2O at 273 K
Phase Equilibria in the Ternary Systems Li2B4O7–MgB4O7–H2O and K2B4O7–MgB4O7–H2O at 273 K
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DOI：
10.1021/acs.jced.5b00570
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发表时间：
2016-02
影响因子：
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通讯作者：
Chao Fu;S. Sang;Mei-fang Zhou;Qing-zhu Liu;Ting-ting Zhang
中科院分区：
文献类型：
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作者：
Chao Fu;S. Sang;Mei-fang Zhou;Qing-zhu Liu;Ting-ting Zhang
相平衡和相图在盐湖卤水资源的开发利用中一直起着重要的作用。本文用等温溶解度平衡法研究了Li_2B_4 O_7-MgB_4 O_7-H_2 O和K_2B_4 O_7-MgB_4 O_7-H_2 O两个三元体系在273 K时的相平衡。测量了上述这些体系中组分的密度和溶解度。根据测定的平衡数据和相应的平衡固相，绘制了三元体系的相图。结果表明，两个三元体系在273 K时均为简单的全饱和型，不存在复盐和固溶体，相图均由一个共晶点、两条单变量溶解度曲线和两个固态晶相区组成。Li_2B_4O_7-MgB_4O_7-H_2O三元系中对应于共晶点的两个平衡固相为Li_2B_4O_7·3H_2O和MgB_4O_7·9H_2O。在K2 B4 O 7-MgB 4 O 7-H2O三元体系中，
Phase equilibria and phase diagram always play an important role to utilize the salt lake brine resources. In this paper, the phase equilibria in two ternary systems Li2B4O7–MgB4O7–H2O and K2B4O7–MgB4O7–H2O at 273 K were studied using the isothermal solubility equilibrium method. The densities and solubilities of the components in these systems listed above were measured. Based on the determined equilibrium data and the corresponding equilibrium solid phase, the phase diagram of the ternary systems were shown, respectively. The results show that the two ternary systems at 273 K are simple total saturated type and there are no complex salt and solid solution found. Besides, the phase diagrams of the two ternary systems are both constituted of a eutectic point, two univariant solubility curves, and two solid crystalline phase regions. The two equilibrium solid phases corresponding to the eutectic point of the Li2B4O7–MgB4O7–H2O ternary system are Li2B4O7·3H2O and MgB4O7·9H2O. In the K2B4O7–MgB4O7–H2O ternar...