IMPROVEMENT OF C3+ RECOVERY

A method for producing a stream enriched in hydrocarbons containing three or more carbon atoms from a feed gas stream, comprising:a) separating an at least partially condensed feed gas comprising hydrocarbons containing three or more carbon atoms (108) in a phase separator (109), thereby producing a liquid stream rich in hydrocarbons containing three or more carbon atoms (110), and a vapor stream lean in hydrocarbons containing three or more carbon atoms (111),b) heating the liquid stream rich in hydrocarbons containing three or more carbon atoms (110) and introducing the heated stream (123) into separator drum (112), thereby producing an overhead stream enriched in hydrocarbons containing no more than 3 carbon atoms (113), and a liquid product stream enriched in hydrocarbons containing three or more carbon atoms (114),c) warming the vapor stream lean in hydrocarbons containing three or more carbon atoms (111) to ambient temperature, then separating the ambient temperature stream in a membrane unit (115), thereby producing a permeate stream (116) and a retentate stream (117),d) cooling the retentate stream (117) and expanding the cooled retentate stream (202), combining the cooled, expanded retentate stream (204) with the overhead stream overhead stream enriched in hydrocarbons containing no more than 3 carbon atoms (113),e) warming the combined stream (205), then exporting as a fuel gas stream (206).f) combining the permeate stream (116) with the feed gas stream (101).