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1、AceticanhydrideproductionprocessAceticanhydrideisacolorlessvolatile,withastrongirritatingsmellandcorrosivenessliquid.Nameofaceticanhydride,molecularformulaC4H6O3,theflashpointof64.4DEGc..Densityof1.0820g/cm3.Meltingpoint-74.13DEGc..Theboilingpointof138.63DEGc..TherefractiveindexnD1.390.
2、20degreesofviscosityof0.91mPa?S.Spontaneousignitiontemperatureof388.9DEGc..Solubleincoldwater,inwaterisdecomposedintoaceticacid,ethylacetateandethanolproduction.Solubleinchloroform,etherandbenzene.Toxic,eyeandmucosahasastrongirritating,massconcentrationof0.36mg/m3whentheeyeirritation;0.
3、18mg/m3,canchangeaperson'sbrainelectricalimage,cancausetissueproteinmodification.Thesteamstimulationisstronger,extremelyeasytoburntheskinandeyes,suchasfrequentexposurecancausedermatitisandchronicconjunctivitis.OnratoralLD50was1780mg/kg.Whenspilledandoradhesiontotheskin,toimmediatelywith
4、wateror2%washingsoda,systemicpoisoningshouldbetimelymedicaltreatment.Airmaxallowablevolumefraction5uL/L.Aceticanhydrideisthecountrytoencouragethedevelopmentofbasicorganicchemicalrawmaterials,mainlyusedfortheproductionofcelluloseacetate,ofwhichtwocelluloseacetateisusedinthemanufactureofc
5、igarettefiltertipandplastic,threecelluloseacetateisthemanufacturingofadvancedfilmmaterial,iswidelyusedinmedicine,pesticides,dyes,military,spices,metalfinishingindustries.Aceticanhydrideis"precursor"products,aceticanhydrideproduction,managementmustbeinthepublicsecurityorganforarchivalfil
6、ingcertification,enterprisessoldeverybatchofgoodstoperformdetailedregistration,andtothepublicsecurityorganfortherecord.Accordingtothelegalprovisions,toundocumentedunits200kgaceticanhydride,willbesentencedto3yearsimprisonment.Industrializationofaceticanhydrideproductionprocesshasthreekin
7、ds:theoxidationofacetaldehyde,ethyleneketoneandmethylacetatecarbonylation.AcetaldehydeoxidationtechnologysourcefortheCanadianShaWiniganchemicalcompany.Theproductionprocessisasfollows:acetaldehydeandoxygenat60degreesC,101kPaor70degreesC,600-700kPaundertheconditionsoftheoxidation
