Open loop mixed refrigerant cycle for ethylene recovery

Open loop mixed refrigerant cycle for ethylene recovery

Refrigeration is provided in an ethylene recovery plant by an open-loop mixed refrigeration cycle which utilizes components present in the ethylene-containing feed gas as the mixed refrigerant. Refrigeration is provided by subcooled mixed refrigerant at -175 DEG to -225 DEG F. for the demethanizer o...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HOWARD, LEE J, ROWLES, HOWARD C
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
BLASTING
CHEMISTRY
COMBINED HEATING AND REFRIGERATION SYSTEMS
GENERAL METHODS OF ORGANIC CHEMISTRY
HEAT PUMP SYSTEMS
HEATING
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
METALLURGY
MIXTURES BY PRESSURE AND COLD TREATMENT
ORGANIC CHEMISTRY
REFRIGERATION OR COOLING
WEAPONS
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Beschreibung
Zusammenfassung:Refrigeration is provided in an ethylene recovery plant by an open-loop mixed refrigeration cycle which utilizes components present in the ethylene-containing feed gas as the mixed refrigerant. Refrigeration is provided by subcooled mixed refrigerant at -175 DEG to -225 DEG F. for the demethanizer overhead condenser and for initial cooling and condensation of the ethylene-containing feed gas. Overall ethylene recoveries of up to 99.9% can be achieved at reduced power consumption compared with conventional ethylene recovery cycles. In addition, significant capital savings can be realized due to the simplification of equipment with the open-loop mixed refrigerant cycle.