醋酸-水萃取精馏溶剂的筛选  

Selection of solvents for extractive distillation of acetic acid-water system

作　　者：胡兴兰[1] 周荣琪[2] 

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

出　　处：《化学试剂》2009年第8期643-645,共3页Chemical Reagents

基　　金：河北省科技攻关项目(06213030)

摘　　要：采用平衡组分分析法对醋酸-水萃取精馏的溶剂进行了筛选。首先,对醋酸-水体系的常压气液平衡(VLE)数据进行了测定,并与文献值比较,同时采用Herington面积法对数据进行热力学一致性的检验,从而考察了气液平衡数据测定装置的稳定性及可靠性。然后,测定加入不同溶剂后体系的VLE数据,比较不同溶剂对体系的选择度,初步筛选出选择度最大的N-甲基乙酰胺(NMA)为醋酸-水萃取精馏的较优溶剂。The selection of solvents for extractive distillation of acetic acid-water system through analyzing the vapor-liquid equilibrium（VLE）data was studied.Firstly,the atmospheric VLE data of the acetic acid-water system were measured,and the reliability of the vapor-liquid equilibrium apparatus was tested by comparing the measured VLE data with those reported in the literature and by checking their thermodynamic consistency.Secondly,the atmospheric VLE data of the acetic acid-water system with solvents were measured,and also the changes in relative volatility and the selectivity were checked,so that the optimum solvent NMA was then selected.

关 键 词：醋酸-水 萃取精馏 溶剂筛选 N-甲基乙酰胺 

分 类 号：TQ223.1[化学工程—有机化工]