Process for shut-down of a membrane operation

Details Process for shut-down of a membrane operation Process for shut-down of a membrane operation

B - Operations, Transporting

01

D

B01D 53/22 (2006.01)

Patent

CA 2215777

A process is disclosed for the shut-down of a membrane separation zone comprising a non-permeate side and a permeate side and processing a feed stream comprising a non-permeable component, a less-readily permeable, condensible component, and a readily permeable component. When the feed stream is not passed to the membrane separation zone, a purge stream is passed at a relatively higher pressure to the non-permeate side of the membrane separation zone to remove a residual gas stream and thereby prevent condensation of the less-readily permeable, condensible component upon depressurization and/or cooling of the membrane separation zone. The invention reduces the need for oversizing membrane system which reduces treating costs and prevents permeate damage to membrane surfaces caused by condensation of less-readily permeable, condensible components such as C6+ hydrocarbons.

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