摘要
针对目前国内处理制药过程中低浓度DMF含盐废水收率低、分离效果差、能耗高等问题,提出一种萃取结合精馏的新工艺。通过单因素对比实验,确定了适宜的萃取操作条件:萃取剂为氯仿,温度为20℃,溶剂比为2。通过新工艺与原有的减压精馏工艺进行对比实验表明,新工艺将DMF产品的质量分数由98.87%提高到99.85%,产品收率提高了29%,而再沸器能耗降低44%。
In order to overcome the high operation cost,low product purity and low yield of traditional separation procedure for saliniferous wastewater of low concentration of DMF in pharmacy industry,a novel separation process combining with extraction and distillation was proposed.The optimum conditions for the new procecess were obtained as follows.The extraction was carried out at 20℃using chloroform as solvent and the ratio of solvent was 2.By application of new process,purity of DMF product can be raised to 99.85%from 98.87%and the yield of DMF can be increased by 29%.Compared with traditional process,energy consumption can be decreased by 44%.
作者
方静
李春利
宋博
Fang Jing;Li Chunli;Song Bo(School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China)
出处
《环境工程》
CAS
CSCD
北大核心
2009年第4期32-34,39,共4页
Environmental Engineering
基金
河北省自然基金项目(B2006000018)
