4PEROX-OMS-RESART---CML-577

NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTARTNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTARTPEROXIDATIONREACTOR01R0161/0171/0181SYSTEMSTARTUPFROMSTANDBYPurposeThepurposeofthisprocedureistostartupthePeroxidationReactor01R0161/0171/0181Systemfromastandbycondition.ConditionsThePeroxidationReactor01R0161/0171/0181Systemisinthestandbymode.Thesystemisintotalrefluxinpreparationtoreceivefeed.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTARTGUIDELINENOTE:ENSUREPRESSUREOFN59NITROGENDOESNOTGOBELOW4.14MPAGTOPREVENTHYDROCARBONSFROMENTERINGTHENITROGENSYSTEMFROMTHEPEROXIDATIONREACTORVIATHEO.M.S.•VerifyallOMSpermissiveshavebeensatisfied.•Verifysteampressurecontrollersaresetinmanualandclosed.•SetTemperatureControllerinmanualwithanoutputequaltocascadedPressureControllerpressurereading.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTARTNOTE:ENSURETEMPERATURECONTROLLERSAREINCONTROLAFTERESTABLISHINGOXYGENFEED.ASOXYGENISADDEDHEATISGENERATED.WHENTHESTEAMVALVESONTHEREACTOROVERHEADCOOLERSAREPLACEDINMANUALANDCLOSED,THEREACTORCANOVERHEATANDPRESSUREUP.FAILURETOOPENTHESTEAMVALVESINATIMELYMANNER(5TO15MINUTESAFTERESTABLISHINGOXYGENFEED)CANRESULTINLIFTINGTHERELIEFVALVES.TOPREVENTTHISBFROMOCCURRING,OMSWILLBETRIPPEDANDOVERHEADCOOLERSWILLBEVENTEDTOATMOSPHEREUPONAHIGHHIGHPRESSUREACTIVATION.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTARTNOTE:DUETOTHEOMSCONTROLSTHENITROGENPURGEONTHESMALLSPARGERWILLCLOSEWHENSTARTSMALLSPARGERISTOGGLEDONTHESTART-UPSEQUENCETHUSCREATINGASTAGNANTAREAINTHEOMSPIPING.THEREFOREOXYGENFLOWMUSTBESTARTEDIMMEDIATELYTOPREVENTRECYCLEGASFROMENTERINGOMSPIPINGANDCREATINGAHAZARD.NOTE:NEVERCLOSEFV-01236ORFV-01336ORFV-01436TOSTOPOXYGENTOTHESPARGERS.ALWAYSUSETHEOMSTRIPBUTTONTOENSURESAFECONDITIONSBETWEENTHESPARGERBLOCKVALVES.•StepthroughOMSStart-Upsequence.•Monitorreactortemperaturecloselyasoxygencontrolvalveopens.•Monitorpressureduringoxygenaddition.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTART•SlowlydecreaseoutputofTemperatureControllerasTemperature/PressureincreaseopenPressureValvesallowingS0.6andS1steamintoS0.6andS1headerthuscoolingReactorandcontrollingpressureandtemperature.•Verifyreactortemperaturecontrolsaresetfornormalreactoroperations.•Startisobutanefeedtoreactorat25%ofnormalfeedrate.NOTE:SINCETHEREACTIONMAYBEGINVERYSLOWLYAFTEROXYGENISINTRODUCEDINTOTHEREACTOR,ITISVERYIMPORTANTTOMONITORTHEOXYGENCONTENTOFTHEGASINTHEHEADSPACEOFTHEREACTOR(S).HIGHOXYGENCONTENTISPOTENTIALLYFLAMMABLEANDWILLSHUTDOWNTHEOXYGENFEEDSYSTEM.•StartoxygenfeedtoOxygenMixStationat25%ofnormalfeedrate.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTART•Monitoroxygencontentofreactorheadspaceusinganalyzers.NOTE:IFOXYGENCONTENTOFREACTORHEADSPACEANDREFLUXDRUMEXCEEDS2MOL%OMSTRIPWILLACTIVATE.ALLOWOXYGENTOBECONSUMEDINTHEREACTORBEFORERESTARTINGTHEOXYGENFEED.•Startreactoreffluentfeedto1stIC4RecycleColumnasweirestablishesanormaloperatinglevel.•Monitorreactoreffluentfrom1stIC4RecycleColumnReboilersforTBHPcomposition.•TBHPconcentrationwillgraduallyincreaseasthereactionprogresses.•Increaseisobutaneandoxygenfeedratestoreactorsat50%ofnormaloperatingrates.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEOMSRESTART•ContinuetomonitorreactoreffluentcompositiontodeterminehowmuchTBHPisbeingproduced.•Increaseisobutaneandoxygenfeedratestoreactorsat75%ofnormaloperatingrates.•ContinuetomonitorreactoreffluentcompositiontodeterminehowmuchTBHPisbeingproduced.•Increaseisobutaneandoxygenfeedratestoreactorstonormaloperatingrates.•StartDryTBAfeedtoreactorsifinstructedbyOperatingGuidelinesorOperationsCoordinator.•IncreaseDryTBAfeedratestoreactorsuntilnormalratesareachieved.•ContinuetomonitorreactoreffluentcompositiontodeterminehowmuchTBHPisbeingproduced.