Process for devolatilizing natural gas liquids

Details Process for devolatilizing natural gas liquids Process for devolatilizing natural gas liquids

F - Mech Eng,Light,Heat,Weapons

25

J

162/113

F25J 3/02 (2006.01) C07C 7/00 (2006.01)

Patent

CA 1232834

A PROCESS FOR DEVOLATILIZING NATURAL GAS LIQUIDS ABSTRACT A natural gas liquid which has been cryogenically extracted from a natural gas feed is devolatilized by removing a portion of the ethane from the liquid. The natural gas feed stream is initially split into two streams, the smaller part of the stream being fed to the bottom of a demethanizing absorber at a low temperature and the larger part of the stream being fed to the top of the absorber at a substantially lower cryogenic temperature. A methane-rich gas product is recovered from the top of the absorber while the methane-lean liquid in the bottom of the absorber is fed to a non-cryogenic deethanizer. A portion of the vola- tiles in the methane-lean liquid are removed in the deethanizer and re- cycled back to the absorber leaving a devolatilized natural gas liquid product.

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