離子熱合成磷酸鋁分子篩及其表征

1、江南大學碩士學位論文離子熱合成磷酸鋁分子篩及其表征姓名：李翠霞申請學位級別：碩士專業(yè)：化學工藝指導教師：張海朗20080701AbstractAbstractMolecularsieveporousmaterialsplayanimportantpartinmanyapplicationssuchascatalysisandseparationinmodernindustryTraditionallymolecularsievesare

2、synthesizedmainlybyhydrothermalorsolvothermalsystemsInthosesystems，thereactantswereplacedinasealedautoclaveandheatedto100200。Cresultinginallautogenouspressure。Recently，anovelgreenmethod，ionothermalsynthesishasbeendevelop

3、edforpreparingaluminophosphatesmolecularsievesusingionicliquidsasbothsolventandstructure—directingagentTheextremelylowvaporpressureofionicliquidallowsthereactionstakingplaceatnearambientpressureathightemperatureeliminati

4、ngthesafetyconcerns，Inaddition，thefeasibilityofrecyclinguseofionicliquidsCanmaketheindustrialprocessmoreattractiveTherefore，itisexpectedthatthisnewmethodCanbedevelopedtomorewidelyindustrialfieldsinthefutureInthistext，ase

5、riesofimidazolium—basedandhydroxylammoniumionicliquidshavebeensynthesizedHydroxylammoniumionicliquidsarefirstlyusedintheionothermalsystemsPureandtransitionmetalcontainingmicroporousaluminophosphatemolecularsieves誠thdiffe

6、rentstructuresweresynthesizedusingtheseionicliquidsasbothsolventandstructure—directingagentTheinfluencesofsynthesisconditionssuchastheratioofrawmaterials(P20s／A1203ratio，HF／A1203radioetc)，crystallizationtemperatureandtim

7、e，thevarietyofionicliquidsonthecrystallinityandcharacteristicsofmaterialsweresystematicallyinvestigated，alsotherecyclinguseofionicliquidsOurstudiesconfirmthatthenovelionothermalapproachisasimpleandsafeprocesstosynthesize

8、variousmicroporousmolecularsievesFirstly，aseriesofionicliquidshavebeensynthesized，includingimidazolium—basedandhydroxylammoniumionicliquidsAcommontwo—stepspathtoimidazoliumbasedionicliquidandaone—steppathofneutralization

9、tohydroxylammoniumionicliquidhavebeenraisedaccordingtosynthesisprocess。Secondly，Pureandtransitionmetal(Co，F(xiàn)e)containingmicroporousaluminophosphatemolecularsievesweresynthesizedusingaseriesofionicliquidsincluding1ethyl一3一

10、methylimidazoliumbromide([Ernim]Br)，1butyl一3一methylimidazoliumbromide([Bmim]Br)and1butyl一3methylimidazoliumtetrafluoroborate(【Bmim][BF4])XRDandFTIRindicatedthatalltheresultingmicroporousmaterialswerewitllSODstructureAlum

11、inum(gallium)phosphateswi也quartzandLTAstructuresweresynthesizedionothermallyin【Emim]BrsystemAluminophosphatemolecularsieveswi也fourstpactures(AEL，A1P0414A，AFIandGIS)weresynthesizedionothermallyinhydroxylammoniumionicliqui

12、dsystemsincludingHEA，HELandTHEALTheresultsshowedthat：Inimidazoliumbasedionicliquidsystems，theoptimumsynthesisconditionswereatlowerconcentrationoforthophosphoricacidandhighertemperatureintherangeof170—190℃for35days。Thecon