FRACTIONAL DISTILLATION OF HIGH PRESSURE H-C GASES

A process for separation of a high pressure gas stream (10) such as light refinery gases in which the gas mixture is expanded, preferably through a turbine (28), and separated into first vapor and liquid portions. The first vapor portion (31) may be recovered as, for example, methane-rich product ga...

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Bibliographische Detailangaben
Hauptverfasser:	DONNIE K. HILL, CHARLES A. DURR, SHANMUK SHARMA
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS 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:	A process for separation of a high pressure gas stream (10) such as light refinery gases in which the gas mixture is expanded, preferably through a turbine (28), and separated into first vapor and liquid portions. The first vapor portion (31) may be recovered as, for example, methane-rich product gas. The first liquid portion (33) is raised to an intermediate pressure, revaporized, and introduced to a fractionator (36) from which an ethane-containing stream is recovered. The ethane-containing stream (37) is then cooled and separated (in 39) into a second vapor portion (40) and a second liquid portion (42) which is then expanded (in 43) and combined with the expanded starting gas mixture (29) to increase the amount of refrigeration that may be recovered from the first liquid stream prior to its fractionation.