甲苯液相空氣氧化制苯甲酸和苯酚的新催化劑及工藝研究.pdf

1、湖南大學(xué)碩士學(xué)位論文甲苯液相空氣氧化制苯甲酸和苯酚的新催化劑及工藝研究姓名：何斌鴻申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：化學(xué)工藝指導(dǎo)教師：吳鑫干20050430碩士學(xué)位論文IIAbstractBenzoicacidbenzaldehydephenolareallessentialganicchemicalmaterialtheyarewidelyutilizedwhat’smetheirindustrialsynthesismethodsarevar

2、ious.Amongtheirmanysyntheticmethodsthemeansbyliquidphaseairoxidationoftoluenepossessesgreatsuperiitypotentialfdevelopment.Inthispaperaseriesofcrelativesubjectsontolueneliquidphaseoxidationpreparationphenolaredetailedlyin

3、vestigated.Firstlyafterthethermodynamicsoftolueneoxidationisinvestigatedtheconclusionof?rG＜0?rH＜0hasbeengot.Secondlybymodifyingtheinternalconstructionofreactingtetrabromoethane(TBE)ascocatalystoptimizingthereactioncondit

4、ionsconversionoftoluenehasreached52.3%theyieldofbenzoicacid60.9%(wt%)theyieldofbenzaldehyde7.8%(wt%).Thenapplyingbubblereactwithagitatthetwostepsprocessroutethepreparationofphenolbyliquidphaseoxidativedecarboxylationofbe

5、nzoicacidisstudied.Usinganagitatagasdistributwithminipesmasstransferofoxidationreactionisintensifiedreactionvelocityspacetimeyieldofphenolareenhanced.Applyingtwostepreactionroutethefmationoftarissuppressed.Inpracticeunde

6、rexperimentationconditionsnotarisobserved.Throughoptimizingthereactionconditionstheyieldofphenolachieves59.5%(mol%).Bycarryingoutexplingstudyofzirconiadioxideascocatalystweknowwhatzirconiadioxidecanimproveoxidativecapabi

7、lityofcuprumcontainingcatalysteffectivelyaccelerateoxidationvelocityofcuproussalt.Itmayturnintoaneffectivecocatalystinliquidphaseoxidationofbenzoicacid.Finallyseparationrefinementofproductsaswellasrecoveryofrawmaterialca

8、talystareinvestigated.Applyingrectificationtorefineproductsthepurityofproductsisenhanced.Usingrecoveryroutedevisedbyourselfthepercentrecoveryofcatalystshasarrivedat95%thepercentrecoveryofrawmaterialat96.5%.Theaimofreduci