毛细撞击流反应器用于液液相萃取cr(ⅵ)的-研究

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1、北京化工大学硕士学位论文萃取的结果进行优化。结果表明：从降低破乳时间和提高萃取效率的角度，，环己烷为稀释剂时的撞击萃取结果最佳；撞击后萃余液进行盐析离心不仅能够大大缩短破乳时间，同时能够促进萃取的继续进行，实现对萃取结果的优化。关键词：毛细撞击流反应器，微观混合，液液萃取，Cr(VI)Ⅱ=些璺堡竺!STUDYOFLIQUID-LIQUIDEXTRACTIONOFCr(VI)INMICRo-IMPINGINGSTREAMREACTORSABSTRACTEquipmentminiaturizationisanimportantwayofchemicalprocessintensifi

2、cation．Asanewprocessstrengtheningequipment，micro．impingingstreamreactor(MISR)，whichcombinestheadvantagesofmicroreactorandimpingingstreamtechnology,hasasuperiormicro—mixingperformanceandgoodapplicationprospect．Withthedevelopmentofchemicalproductionandemphasisonenvironmentalissues，highefficienc

3、y,energysavingandthoroughtreatmentmethodsoftheenvironmentalproblemshavebeenproposedandusedwidely．TheapplicationofMISRonenvironmentalandwastewatertreatmentnotonlycanpromotetheenvironmentalprotectiondevelopment，butalsoprovidesnewdirectionsofreactorimprovement．Inthisthesis，researchontheextractio

4、nofharmfulionCr(vi)fromwastewaterhasbeenconductedinMISRandthestrengtheningeffectofMISRonextractionprocesswasconfirmed．(1)TheeffectsofoperatingconditionsandstructuralparametersonextractionofCr(vi)fromaqueousphasehasbeenstudiedwithTBPasextractantandkeroseneasdiluent．Resultsdemonstratedthat：thee

5、xtractionefficiencywasimprovedwithincreaseofflowrates，butemulsificationwouldIIl北京化工大学硕士学位论文happenwhenflowratewastoohigh．Theextractionwasthebestwhenthetwoimpingingphaseswerewithequalmomentumandextractionratewasincreasedalongwiththeextensionofstandingtime．Inletcapillarylengthdidnotaffecttheextr

6、actionresult，whilethesmallertheinletcapillarydiameterwas，thelargerimpingingmomentumcouldbeprovided，whichledtohigherextractionrate．Thebestoutletstructurewaswithoutoutletpipe．Comparedwithtraditionalstirringmethod，MISRdemonstratedgreatstrengtheningeffectonextractionprocessintermsofhigherextracti

7、onrate，shorterreactiontimeandlessenergyconsumption．(2)Bychangingdiluentandtheseparationmethodsoftheraffinate，theMISRextractioneffectgotoptimized．Theresultsshowedthat：thebestresultfordevelopmentofdemulsificationtimeandextractionratecouldbeobta