Patent ID: 9221730
Filing Date: 2015-12-29
Classification: B01D,C07C,C10L

Abstract:
1. A pro cress for conditioning a portion of a gas stream, the gas stream comprising at least methane and C 2+ hydrocarbons and the process comprising the following steps: (a) withdrawing the portion from the high-pressure gas stream; (b) providing a membrane unit having a feed side, a permeate side, and a residue side, and containing a membrane selective for methane over C (c) passing the portion as a feed stream across the feed side under conditions in which transmembrane permeation occurs; (d) withdrawing from the residue side a membrane residue stream; (e) withdrawing from the permeate side a membrane permeate stream enriched in methane and depleted in C (f) routing the membrane permeate stream as a portion of a fuel gas stream to a fuel user, wherein the process operates at a stage cut of at least 5%.