METHOD FOR PRODUCING A C3+ HYDROCARBON-RICH FRACTION AND A METHANE- AND ETHANE-RICH STREAM FROM A HYDROCARBON-RICH FEED STREAM, AND RELATED FACILITY.

摘要

The invention relates to a method that comprises separating a feed stream (16) into a first fraction (60) and a second fraction (62), and placing at least part of the second fraction (62) into a second dynamic expansion turbine (46) so as to form a second expanded fraction (80). Said method further comprises cooling the second expanded fraction (80) by exchanging heat with at least a portion of the first headstream (84) from a first column (28), and forming a second feed stream (82) of the first column (28) from the cooled second expanded fraction.