连续搅拌反应釜制备碳化二亚胺改性mdi工艺.研究

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1、山东大学硕士学位论文ABSTRACTCarbodiimidemodifieddiphenylmethanediisocyanateiSa1iquidmodifiedMDI，whichhasbeenwidelyusedincombinationwithhighmolecularweightpolyetherpolyolsforpreparinghighgradeflexible，semiflexible，andintegralskinfoam．Ithasalsobeenuti1izedinthepreparationof

2、prepolymers．forelastomer，sealant，adhesive，andcoatingapplications．However，conventionalprocessforpreparingthisproducthasbeenassociatedwithvariousoperatingproblemssuchaslowyieldandlotsofwastewaterwithhighCOD．Inaddition，forthebatchmethodofoperation，thisprocessalsoin

3、volvedinhighexpensesoflaborsanddifficultyofcontrollingthequalityandquantityofcarbodiimidemodified泐I．Inrecentyears，alongwiththecontinuouslyincreasingdemandforthisproduct，establishmentoflarge—scalecontinuouslycraftforpreparationofcarbodiimidemodifiedMDIbecomesurge

4、nt．TheadvantagesoftheCSTRincludehighdegreeofautomatizationandstablilityinthequalityandquantityofcorrespondingproducts．IfthesynthesisofcarbodiimidemodifiedMDIcanbeachievedwithacontinuouscraft，itcanbeexpectedthattheyieldandqualityofproductwillbecomestableandeasily

5、controllable．Inaddition，consumptioninthemanpowerandchemicalmaterialcanbelargelyreduced．Withthispurposeinmind，inthepresentwork，themainrestraintconditionsfortheproductionandoperationofcarbodiimidemodifiedMDIUSingpresentcrasthayebeendeterminedbyconsulting1iterature

6、sincombinationwiththeactualindustrialsituation，whichincludethesystemload，materialallocatedproportion，catalyzerallocatedproportion，systempressure，variousreactortemperature，andstiringorrotatingspeed．Onthebasisoftheseefforts，thecontinuouslyexperimentalequipmentfort

7、heproductionofcarbodiimidemodifiedMDI8山东大学硕士学位论文hasbeendesigned．Afterthepreparation，setup，anddebuggingofthecontinuouslyexperimentalequipment，aseriesofproductionexperimentsinlabscalehavebeencarriedout．Onthebasisofsummarizationandanalysisofcorrespondingexperimenta

8、lresults，itcanbeconcludedthattheequipmentfortheproductionofcarbodiimidemodifiedMDIusingcontinuouslycraftisfeasible．Furthereffortsprovidetheoptimizedoperatingcondition