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Liquid-Liquid Equilibrium of the Water-Cyclohexane-Ethanol System
Author(s): 
Pages: 643-647
Year: Issue:  4
Journal: JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES

Keyword:  水-环己烷-乙醇液液平衡气相色谱内标法;
Abstract: 用GC-14B气相色谱仪测定了水-环己烷-乙醇体系在298.15K、308.15K、318.15K和328.15K的等温截面相图.所用方法是内标法,内标物为乙酸乙酯,溶剂正丁醇.实验测定了除水以外各组分的保留时间和相对校正因子,相对校正因子的实验值与文献值很接近.在单相区域,对实验准确度进行了验证,均方根实验误差1.51%.给出了四个等温截面的两相平衡实验数据和相应的示意图.其相图特征与水-正己烷-甲醇体系相仿;当醇浓度不大时,存在较大的水相、油相共存区域;醇浓度较大时为单相区域.但在水-环己烷-乙醇体系中,单相区域随温度增加明显增大.
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