KONFIGURATION UND VERFAHREN ZUR GEWINNUNG VON FLÜSSIGEM ERDGAS UNTER VERWENDUNG EINES UNTERKÜHLTEN RÜCKFLUSSVERFAHRENS

摘要

An NGL recovery plant includes a demethanizer ( 7 ) in which internally generated and subcooled lean oil absorbs CO₂ and C₂ from a gas stream ( 11 ), thereby preventing build-up and freezing problems associated with CO₂, especially where the feed gas has a CO₂ treatment at ethane recoveries above 90% and propane recoveries of at least 99%.