1、河北工業(yè)大學碩士學位論文尿素與1，2丙二醇催化合成碳酸丙烯酯反應研究姓名：張艷申請學位級別：碩士專業(yè)：化學工藝指導教師：趙新強20040301STUDYONCATALYTICSYNTHESISOFPROPYLENECARBoNATEFROMUREAAND12PROPYLENEGLYCOLABSTRACTThereactionsystemofsynthesizingpropylenecarbonatefromnreaand12propyl

2、eneglycolhasbeenanalyzedthermodynamicallyTheconclusionisdrawnthatGibbsfleeenergyandenthalpyofthereactionare一37671kJ／moland52210kJ／toolat29815KrespectivelyIncreasingreactiontemperatureCallnotonlyincreasereactionratebutals

3、oenhanceequillibriumconversionThecatalyticperformancesofzincacetate，metaloxideandmetalhavebeeninvestigatedforthisreactionsystem。Thehomogeneoussynthesisofpropylenecarbonate(PC)hasbeenstudiedoverZn(OAc)2catalyst；PCyieldis9

4、37％underthesuitableconditionsAccordingtotheresultofGC／MSsomeside—reactionshasbeensupposedInaddition，itisfoundthatZn(OAc)2catalysthastakenpartinthereactionSupportedzincacetatecatalysthasbeenprepared，andtheeffectofsupporta

5、ndloadsonPCyieldhasbeenstudied111estabilityof15％Zn(OAc)flACcatalysthasbeenreseached；theyieldofPCdecreasestO661％ofusedcatalystfrom782％offleshcatalystAccordingtotheanalysisresultofXRD，XPSandatomicabsorptionspectroscopyofbo

6、thusedandfleshcatalysts，aswellastheresultofGC／MSofthesolutionafterreaction，thereasonfordeactivationofZn(OAc)2／AChasbeendeterminedThecatalyticperformanceofmetaloxidecatalystsonsythesisofPChasbeenestimated；MgOshowsthebesta

7、ctivityThebestcalcinationtemperatureofmagnesiumbicarbonate，750“ChasbeenreachedThesuitablereactionconditionshavebeenbeendeterminedbyorthogonalexperimentoverMgOcalcinedfrommagnesiumbicarbonate；thehJ【ghestyieldofPCis915％Sup

8、portedMgOonsilicahasbeenpreparednleeffectofprecursorloadsandcalcinationtemperatureoncatalystactivityhasebeenstudied；thehighestyieldofPCis863％AseriesofcompoundmetaloxidecatalystshavebeenpreparedbydifferentmethodsAmongthos

9、e，Mg—AIcompoundoxidehasbettercatalystactivityThatMg—AIprecursorCallbedecomposedcompletelyat4006CisdeterminedbybothTG—DTAandXRDanalysisofcatalystsatdifferentcalcinationtemperatureTheeffectoftitrationmanrlerMg／AItootarrati