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.
出处
《环境污染治理技术与设备》
CSCD
北大核心
2006年第11期81-83,共3页
Techniques and Equipment for Environmental Pollution Control
