Method for separating off nitrogen from natural gas

Abstract Method for separating off nitrogen from natural qas A method for resolving a hydrocarbon-rich, nitrogen-containing feed fraction (1, 1'), preferably natural gas, is described, wherein the feed fraction (1, 1') is separated by 5 rectification (T1, T2) into a nitrogen-enriched fract...

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Bibliographische Detailangaben
Hauptverfasser:	WITTE, JURGEN, SCHOPFER, GEORG, BAUER, HEINZ
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING 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 MIXTURES BY PRESSURE AND COLD TREATMENT PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRIGERATION OR COOLING SEPARATION TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	Abstract Method for separating off nitrogen from natural qas A method for resolving a hydrocarbon-rich, nitrogen-containing feed fraction (1, 1'), preferably natural gas, is described, wherein the feed fraction (1, 1') is separated by 5 rectification (T1, T2) into a nitrogen-enriched fraction (5) and a hydrocarbon-rich, nitrogen-depleted fraction (10), and wherein the separation by rectification proceeds in a rectification column consisting of a preseparation column (T1) and a main separation column (T2). 10 According to the invention a liquid fraction (6) is taken off from the main separation column (T2) above the feed-in site(s) of the fraction (7, 7', 7") that is taken off from the preseparation column (T1) and fed to the main separation column (T2), and said liquid fraction (6) is applied to the preseparation column (T1) as reflux. (The figure is associated herewith.) 5- 8' 13' El D 1 -L 12 11 1,E D3 34 7,, --- 6 E2 ,V1 T1 5 12' 2