4PO-PURIFICATION-SD-TO-STANDBY-578

NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPOPURIFICATIONAREASHUTDOWNTOSTANDBYGUIDELINENOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPOPURIFICATIONAREASHUTDOWNTOSTANDBYGUIDELINEPurposeThefollowingguidelineisforPOPurificationSystemShutdowntoStandbyCONDITIONSThefollowingconditionsmustbesatisfiedpriortoinitiatingthisguideline:•unitisoperatingnormally•adequateinventoryofPOinOff-SpecPOSpheretocontinuetooperatePOPurificationArea•EpoxidationReactorSystemhasbeenshutdowntostandby.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPOPURIFICATIONAREASHUTDOWNTOSTANDBYGUIDELINEGUIDELINENOTE:ThePOPurificationAreaShutdowntoStandByGuidelineisonlywhenthePOPurificationAreaisputincirculationforshortperiodsoftime.•SwitchPOOverheadproductstreamfromPODayStorageTankstotheOff-SpecPOStorageSphereatthePOProductmanifoldinthetankagearea.•StopIRCoverheadpurgethatisgoingtothe2ndStagePrimaryFractionatortopreventoverfilling2ndStagePrimaryFractionatorwhilePOPurificationAreaisincirculation.•AsfeedfromthePropyleneRecoveryColumnfallsoffthenbegintoraisefeedfromtheOff-SpecPOStorageSpheretotheC5Strippertomaintainoriginalfeedrates.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPOPURIFICATIONAREASHUTDOWNTOSTANDBYGUIDELINE•CirculatePOPurificationAreainthismanneruntilfeedhasbeenrestoredfromthePropyleneRecoveryColumnbottms.•SamplePOProductoverheadeachshift,obtainsampleresultsandreducepurgesaccordinglytominimizePOlossestoProcessLiquidFuels.•ReduceEGMEReclaimerpurgetominimumthatisgoingtoProcessLiquidFuelswhilePOPurificationAreaisincirculation.•MaintainlevelsandtemperatureswhilePOPurificationAreaisinrecirculationmode.