CsCl-C_2H_5OH-H_2O三元体系20℃和60℃平衡溶解度的研究

Phase Diagram of CsCl-C_2H_5OH-H_2O Ternary System at 20℃ and 60℃

采用自制微型平衡溶解度测定装置 ,研究了CsCl C2 H5OH H2 O三元体系 2 0℃和 6 0℃时的平衡溶解度 ,并绘制成相应的相图。首次发现 2 0℃时 ,CsCl C2 H5OH H2 O三元体系中 ,乙醇和水没有发生分层 ;而在 6 0℃时 ,3∶7,4∶6 ,5∶5 ,6∶4和 7∶3比例的样品中 ,原本互溶的乙醇 水混合溶液却发生了分层 ,即有部份的乙醇从乙醇 水混合溶剂中分离出来 ,体系由原来的两相 (液相和固相 )变为轻相、重相和湿固相 ,而其它比例的样品在这一温度没有发生分层。用“湿渣结浅法”确定体系在 2 0℃和 6 0℃时的平衡固相为无水CsCl。

The isothermal solubilities of CsCl C 2H 5OH H 2O ternary system at 20 ℃ and 60 ℃ were determined and the phase diagram were constructed. There are only two phases, liquid phase and wet solid phase in CsCl C 2H 5OH H 2O ternary system at 20 ℃. However, in the CsCl C 2H 5OH H 2O ternary system at 60 ℃,a new phenomena occurres, the sample of C 2H 5OH∶H 2O=4∶6 and 5∶5 appeares as three phases, ethanol(light)phase, water(heavy) phase and wet solid phase while the sample of the C 2H 5OH∶H 2O=1∶9 and 9∶1 still has two phases at 60 ℃. The C 2H 5OH may be salted out by CsCl. The equilibrium solid phase is CsCl.