非均相共沸精馏分离乙二醇及1,2-丙二醇的研究  

Study on Separation of Glycol and 1,2-Propanediol With Heterogeneous Azeotropic Distillation

作　　者：牛玉锋[1] 刘振华[2] 乔凯[2] 陈明[2] 

机构地区：[1]辽宁石油化工大学石化学院,辽宁抚顺113001 [2]抚顺石油化工研究院生物化工部,辽宁抚顺113001

出　　处：《当代化工》2011年第6期560-561,564,共3页Contemporary Chemical Industry

摘　　要：由于乙二醇及1,2-丙二醇的沸点相近,采用常规精馏方法难以分离。本文通过非均相共沸精馏的方法采用乙苯、混合二甲苯、异丙苯三种共沸剂进行实验,结合共沸剂的选择性和共沸物的共沸点来确定共沸剂。通过实验结果分析发现混合二甲苯能明显提高乙二醇及1,2-丙二醇的挥发度,是分离乙二醇及1,2-丙二醇良好的共沸剂。It is difficult to separate glycol and 1,2-propanediol with conventional distillation methods because they have similar boiling point .In this paper, the heterogeneous azeotropic distillation was used to separate glycol and 1,2-propanediol with ethylbenzene, mixed xylene and cumene as azeotropic agent,respectively. Combining with the selectivity of azeotropic agent and the azeotropic point of azeotropic agent, suitable azeotropic agent was determined. The experiment results show that the mixed xylene is a good entrainer because it can improve volatility of glycol and 1,2-propanediol.

关 键 词：非均相共沸精馏 共沸剂 乙二醇 1 2-丙二醇 

分 类 号：TQ028.13[化学工程]