環(huán)醚的催化酰解反應制備雙酯的研究.pdf

1、江南大學碩士學位論文環(huán)醚的催化酰解反應制備雙酯的研究姓名：吉峙潤申請學位級別：碩士專業(yè)：應用化學指導教師：方云20070501塹墮叁蘭堡生蘭堡絲蘭AbstractAseriesofAI—Mgcompositeoxidecatalystsweredesignedandstudiedforcatalysizingonestepalkoxylation(ethoxylationorpropoxylation)oflinear／cyclicca

2、rboxylicacidanhydrideTheoptimumcatalystsforethoxylationofaceticanhydrideandpropoxylationofaceticanhydridewerescreenedoutrespectivelyThereactionbetweensuccinicanhydridewithethyleneoxideaswellaspropyleneoxidewereinvestigat

3、edAtechniqueWasdescribedaboutproducingethyleneglycoldicarboxylicacetate(EGDBA)byinsertingethyleneoxide(EO)intothecarboxylicanhydrides(1inear)directlywithcatalystRAsTheproductswerecharacterizedbyFTIRESI—MS，1HNMRandCrCMSIt

4、Wasfoundthatthecatalyst，RA4，hasthehighestproductionselectivityforethyleneglycoldiacetate(EGDA)TheoptimumselectivityofEGDAWas978％(w／w)underthefollowingoptimizedreactionconditions：amountofAIMgcompositeis16∥100gaceticanhydr

5、ide，theinitialpressure0，n(PO)：n(AA)=I：landdroppingEOwhilemaintaingthepressureofthesystemof035MPaatthetemperatureof130～135℃TheproductionselectivityofEGDAwasnotdecreasediftherecycledcatalysthadbeenreactivatedTheproductofpr

6、opyleneoxide(PO)reacted、vithcarboxylicacidanhydride(1inear)catalyzedbyFXswasidentifiedbyFTIRESI—MSandIH—NMRanalysisThecatalystFX4hasthehighestproductionselectivityofpropyleneglycoldiacIetate(PGDA)TheoptimumselectivityofP

7、GDA(982％，w／w)Wasobtainedunderfollowingsuitableconditions：amountofAI—Mgcompositeis16∥100gaceticanhydride，n(PO)：n(AA)21：landdroppingPOwhilemaintaingthepressureofthesystemof04MPaunderthetemperatureofl30～135℃Thereactionofsuc

8、cinicanhydridewitllEO／POusingA1Mgcompositeoxideascatalystwereexplored，TheproductWasanalyzedbyFTIRandESIMS，TheproductofEOandSAislinearpolymerItWasassumedthatpropyleneoxideWasinsertedintotheanhydrideandformedacompoundwithc

9、yclicstructureTheimtialcompoundthenfurtherlyreactwiththemselvesaswellasPOtoformlargercycliccompoundsKeyWords：catalyst；acylation；onestepethoxylation／propoxylation；carboxylicacidanhydride；ethyleneglycoldiacetate；1，2propyle