醋酸-水萃取精馏过程的模拟  

Simulation of Extractive Distillation of Acetic Acid and Water

作　　者：余美琼[1] 杨金杯[1] 陈秀宇[1] 陈文韬[1] 

机构地区：[1]福建师范大学福清分校生物与化学工程系,福建福州350300

出　　处：《福建师大福清分校学报》2013年第5期53-58,共6页Journal of Fuqing Branch of Fujian Normal University

摘　　要：利用N-甲基甲酰胺(NMF)作萃取剂,萃取精馏分离醋酸和水混合物。利用Aspen Plus流程模拟软件对分离过程进行了模拟计算,确定了理论板数、加料板位置、回流比、加料比等最佳工艺条件及工艺参数。结果表明,利用NMF作萃取剂可以较好的实现醋酸和水的分离,醋酸的纯度可达99.94%,萃取剂可以循环利用;与普通精馏法相比,相同分离任务下,萃取精馏工艺的再沸器热负荷降低了60.4%,生产每吨醋酸再沸器消耗蒸汽量由7.1吨降低到2.8吨。说明萃取精馏法分离醋酸和水优于普通精馏法,节能效果明显,为工业化装置提供了重要的理论依据和设计参考。N-methyl formamide （NMF） was used as extractant for the separation of acetic acid and wa-ter. The process simulation software Aspen Plus was used to simulate the separation process and the optimum operation conditions and process parameters such as the number of theoretical plate stage, po-sition of feed tray, reflux ratio, and feeding ratio were determined. The simulation results showed that NMF is a good extractant, which can efficiently separate acetic acid and water;the purity of acetic acid product was 99.94% and NMF extractant could be recycled in this separation process. Extractive dis-tillation was superior to traditional distillation in separation of acetic acid and water, since the heat du-ties of reboiler was reduced by 60.4%, and the heating steam was reduced from 7.1 tons to 2.8 tons for each ton acetic acid produced. The results could be used as the theoretical basis and design reference for industrial apparatus.

关 键 词：醋酸 水 NMF ASPENPLUS 萃取精馏 

分 类 号：TQ028.3[化学工程]