NaA型分子筛膜用于医药工业异丙醇溶媒渗透汽化脱水_英文_.docx

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2017-12-14 发布于江西
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NaA型分子筛膜用于医药工业异丙醇溶媒渗透汽化脱水_英文_.docx

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NaA型分子筛膜用于医药工业异丙醇溶媒渗透汽化脱水_英文_

PretreatmentofIsopropanolSolutionfromPharmaceuticalIndustryandPervaporationDehydrationbyNaAZeoliteMembranes*YUCongli(余从立),LIUYanmei(刘艳梅),CHENGangling(陈纲领),GUXuehong(顾学红)**andXINGWeihong(邢卫红)StateKeyLaboratoryofMaterials-OrientedChemicalEngineering,NanjingUniversityofTechnology,Nanjing210009,ChinaAbstractNaAzeolitemembraneswith80cminlengthand12.8mminouterdiameterwerepreparedbyourre-searchgroupcooperatingwithNanjingJiusiHi-TechCo.,China.TheinfluenceofdissolvedinorganicsaltsandpHvalueinthefeedofisopropanol(IPA)solutiononNaAzeolitemembraneswasinvestigated.ItwasfoundthatbothfactorsexhibitedstronginfluenceonthestabilityofNaAzeolitemembranes.AsetofpretreatmentstepssuchaspHadjustmentanddistillationoftheIPAsolutionwereproposedtoimprovestabilityforpervaporationdehydration.Anindustrial-scalepervaporationfacilitywith52m2membraneareawasbuilttodehydrateIPAsolutionfromindustrialcephalosporinproduction.Thefacilitywascontinuouslyoperatedat368-378KtodehydrateIPAsolutionfromwa-termasscontentof15%-20%tolessthan2%withafeedflowrateof400-500L·h?1andanaveragewaterfluxof1-1.5kg·m?2·h?1.ThesuccessfulapplicationofthisfacilitysuggestedapromisingapplicationofNaAzeolitemem-braneforIPArecoveryfrompharmaceuticalproduction.KeywordsNaAzeolitemembrane,isopropanol,dehydration,pervaporation1INTRODUCTIONfororganicsolventsdehydrationrunningintheworld.ForIPAdehydration,someliteratureshavebeenreportedbasedonbothpolymericandzeolitemem-branes[7,8],inwhichNaAzeolitemembranespre-sentedexcellentdehydrationperformance.vanHoofetal.[9]comparedtheIPAdehydrationperformanceofcommercialMitsuiNaAzeolitemembranesandothertwokindsofcommercialpolymericpervapora-tionmembranes,namelyCelfaCMC–VS–11VandSulzerPervap2510.TheNaAzeolitemembranesshowedthebestdehydrationpropertiesatwatercon-centrationintheazeotropicregion.ForrecoveryofIPAfrompharmaceuticalindustry,Urtiagaetal.[10]studiedthemethodofpervaporationusingcommercialpolymericmembraneCMC-CF-23fromCelfainlaboratory.Forafixedwatermassconcentrationof10%inthefeed,thewaterfluxinc