废液中N,N二甲基乙酰胺的回收方法

王承学， 杨鹏飞

（长春工业大学 化学工程学院，吉林 长春 130012）

摘要： 从N,N二甲基乙酰胺H2O模拟废液体系中回收N,N二甲基乙酰胺采用蒸馏和萃取2种方法。对2种方法进行能量计算，计算结果显示利用多级逆流萃取的方法回收N,N二甲基乙酰胺节省能量；并研究了三氯甲烷、二氯甲烷和石油醚这3种不同萃取剂的萃取效果，选出最佳萃取剂为二氯甲烷；确定了最佳萃取条件为pH=7，常温，相比为1。

关键词： DMAC；  二氯甲烷；  萃取；   能量计算； 最佳条件

中图分类号：  X 703         文献标志码： A

Methods of Recovering N,NDimethylacetamide from Waste Liquor

WANG  Chengxue，  YANG  Pengfei

(School of Chemical Engineering, Changchun University of Technology, Changchun 130012，China)

Abstract： Two methods of recovering DMAC from simulative waste water were  introduced, distilling and extraction, and  the energy consumption of the two methods was  calculated. It can be found from the results of calculation  that the multiple extraction is the method with less energy consumption. Then, the effect on extraction of three extraction agents which are trichloromethane, dichloromethane, and petroleum ether was  researched. And it was found that  the best extraction agent was  dichloromethane. The optimum extraction conditions have been selected, that is  pH=7,  normal atmospheric temperature and 1 of  the phase ratio.

 Key words:  DMAC; dichloromethane; extration;    energy calculation; optimum conditions

收稿日期： 20130720

作者简介： 王承学（1961—），男，教授.