Phase equilibria and critical phenomena in the rubidium nitrate-water-acetonitrile system

被引：2
|
作者：
Cherkasov, D. G. [1 ]
Il'in, K. K. [1 ]
机构：
[1] Saratov NG Chernyshevskii State Univ, Saratov, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2008年 / 53卷 / 04期
关键词：
Acetonitrile - Nitrates - Phase diagrams - Phase separation - Rubidium compounds - Topology;
D O I：
10.1134/S0036023608040268
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Phase equilibria and critical phenomena were studied from -5 to 120 degrees C in the rubidium nitrate-water-acetonitrile system, in which the liquid binary subsystem is characterized by liquid-liquid phase separation with an upper critical solution point (UCSP), using a visual polythermal method. We found that rubidium nitrate has a salting out effect on water-acetonitrile solutions and causes them to demix at any temperature in the specified range. Acetonitrile distribution coefficients between aqueous and organic monotectic phases were calculated for various temperatures. The minimum value was observed for 20.0 degrees C. Six isothermal phase diagrams of the system were plotted to verify a fragment of the global scheme of the topological transformation of phase diagrams for salt-binary solvent ternary systems with salting out. The salting out effects of potassium, rubidium, and cesium nitrates on water-acetonitrile mixtures were comparatively analyzed.
引用
收藏
页码：639 / 644
页数：6
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