_制药行业DMF废水处理新工艺

_制药行业DMF废水处理新工艺制药行业DMF废水处理新工艺＊方静李春利宋博(河北工业大学化工学院,天津300130)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%。关键词:N,N-二甲基甲酰胺;氯仿;萃取;废水处理ANEWPROCESSFORTREATINGDMF-CONTAININGWASTEWATERINPHARMACYINDUSTRYFangJingLiChunliSongBo(SchoolofChemicalEngineering,HebeiUniversityofTechnology,Tianjin300130,China)Abstract:Inordertoovercomethehighoperationcost,lowproductpurityandlowyieldoftraditionalseparationprocedureforsaliniferouswastewateroflowconcentrationofDMFinpharmacyindustry,anovelseparationprocesscombiningwithextractionanddistillationwasproposed.Theoptimumconditionsforthenewprocecesswereobtainedasfollows.Theextractionwascarriedoutat20℃usingchloroformassolventandtheratioofsolventwas2.Byapplicationofnewprocess,purityofDMFproductcanberaisedto99.85%from98.87%andtheyieldofDMFcanbeincreasedby29%.Comparedwithtraditionalprocess,energyconsumptioncanbedecreasedby44%.Keywords:DMF