萃取精馏分离甲醇-甲苯共沸物的研究

摘要利用UNIFAC基团贡献法对常用萃取剂进行了筛选，选取邻二甲苯作为该二元共沸物的萃取剂，并通过汽液平衡实验对其分离效果进行了验证；进行甲醇甲苯分离的间歇萃取精馏实验考察所选萃取剂的效果。结果表明：邻二甲苯能够有效提高甲醇甲苯的相对挥发度。间歇萃取精馏塔塔板数为30，溶剂比为1，恒回流比(R=3)操作下塔顶得到摩尔分数为99.688%的甲醇产品。

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	张鸾
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	孙畅

关键词：萃取精馏邻二甲苯甲醇甲苯

Abstract： 1, 2-dimethylbenzene was chosen as solvent through UNIFAC group contribution method and its effect was verified by vaporliquid equilibrium experiment. The effectiveness of the selected solvent was investigated by batch extractive distillation experiment. The results show that 1, 2-dimethylbenzene can increase the relative volatility significantly. The batch extractive distillation was carried out in a packed column of 30 theoretical plates. With the constant reflux ratio of 3 and the solvent mole ratio of 1∶1, the product mole fraction of methanol reaches 99.688%.

Keywords： extractive distillation 1, 2-dimethylbenzene methanol toluene

Received 2012-06-06;

Corresponding Authors: 白鹏，电话(022)27406369，E-mail:bp2008@eyou.com。 Email: bp2008@eyou.com

About author: 张鸾（1987-），硕士研究生，现从事化工分离方向的研究。

引用本文:

张鸾, 张锦威, 朱宏吉, 白鹏, 李博, 孙畅.萃取精馏分离甲醇-甲苯共沸物的研究[J]. 化学工业与工程, 2013,30(5): 71-75

ZHANG Luan, ZHANG Jin-Wei, ZHU Hong-Ji, BAI Peng, LI Bo, SUN Chang.Separation of Methano1-Toluene by Extractive Distillation[J]. Chemcial Industry and Engineering, 2013,30(5): 71-75