萃取精馏法分离醋酸-水的研究  

Study of separation of acetic acid and water by extractive distillation

作　　者：胡兴兰[1] 刘纵宇[1] 孙杨[1] 周荣琪[2] 

机构地区：[1]承德石油高等专科学校,承德067000 [2]清华大学化工系,北京100084

出　　处：《环境污染治理技术与设备》2006年第11期81-83,共3页Techniques and Equipment for Environmental Pollution Control

摘　　要：采用萃取精馏法从醋酸水溶液中分离回收醋酸是一新的研究方向,而适宜溶剂的筛选是研究关键。本实验以高沸点含氮类有机化合物作为醋酸-水萃取精馏的候选溶剂,采用平衡组分分析法对溶剂进行了实验筛选。结果表明,溶剂的引入使体系的相对挥发度有较大程度的提高,其中N-甲基乙酰胺(NMA)使水对醋酸的相对挥发度提高最多,为4.75。因此实验确定NMA为最优溶剂,并进行了醋酸-水萃取精馏的工艺实验。与普通精馏结果对比表明,以NMA为溶剂的萃取精馏法分离醋酸-水的效果非常显著,研究结果对开发环保型的醋酸-水分离新工艺具有重要意义。Separation of acetic acid and water by extractive distillation was studied. The solvent-screening experimental results showed that N-methyl acetamide was the optimum agent, giving a highest volatility of 4.75 for the acetic acid-water system. Furthermore, an experiment of extractive distillation with NMA as the solvent to separate acetic acid and water was done and the remarkable separation efficiency was consequently tested.

关 键 词：萃取精馏 分离 醋酸-水 N-甲基乙酰胺 

分 类 号：X78[环境科学与工程—环境工程]