醋酸丙酸纖維素和醋酸鄰苯二甲酸纖維素等纖維素有機(jī)酸酯的合成工藝研究

1、青島科技大學(xué)碩士學(xué)位論文醋酸丙酸纖維素和醋酸鄰苯二甲酸纖維素等纖維素有機(jī)酸酯的合成工藝研究姓名：孟慶莉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：化工工藝指導(dǎo)教師：李英春20040601STUDY0NSYNTHESISOFCAPANDCAPHETCCELLULoSEORGANICACIDESTERSABSTRACTThethesismainlystudiedthepreparationprocessofseveralcelluloseorganicacid

2、estersusingcottonwoolastherawmaterial，whichisindustrialwasteThestructnreoftheproductsisidentifiedbyinfraredandultravioletabsorptionThecontentsanalysisisbydirecttitrationaccordingtotheASTM81796andplasticinternationalcrite

3、rionTheviscosityofsolventismeasuredbyUbbelohdeviscometerTheoptimumsynthesisconditionsofcelluloseacetatepropionateisasfollows：cottonwoolispurifiedandblenchedbysodiumhydrateandsodiumhypochloriteintum，thenisactivatedbymixed

4、solutionofaceticacid，aceticanhydrideandsulfuricacidatfortycentigradedegreefortwohours，thenisesterifiedbymixedsolutionofaceticacid，aceticanhydride，propionicanhydrideandsulfuricacidatsixtycentigradedegreeorsoforonepointfiv

5、ehoursThehydrolysistemperatureisfortycentigradeComparedwithcustomarymethods，thissynthesisimprovedthetemperatureofesterification，reducedthetimeofesterification，soitcarlsaveenergyandcontroltheprocesseasilyTheoptimumsynthes

6、isconditionsofcelluloseacetatephthalateisasfollows：usingappropriatecontentofaceticacidtodissolvecelluloseacetate，thencelluloseacetateisesterifiedbyphthalicanhydrideatseventy—fivecentigradeComparedwithcustomarymethods，thi

7、ssynthesisreducestheamountofdilutedreagentaceticacidconsumedlyandSavesthecostofrecyclingThepaperbringsforwardthesynthesisofcelluloseacetatepropionatephthalatefirstTheoptimumsynthesisroutineisusingcelluloseacetateasmateri

8、alAftercelluloseacetateisdissolvedbyappropriatecontentofaceticacid，thenisesterifiedbypropionicanhydrideandphthalicanhydrideatninetycentigradeWithintroducingofphthalyl，thepropertyofcelluloseacetatepropionatecanbeimprovedT