| 摘要 |
<p>A process is disclosed for shut-down of a membrane separation zone (250) comprising a non-permeate side (250a) and a permeate side (250b) and processing a feed stream comprising a non-permeable component, a less-readily permeable, condensable component, and a readily permeable component. When the feed stream is not passed to the membrane separation zone, a purge stream is passed to the non-permeate side of the membrane separation to remove a residual gas stream and thereby prevent condensation of the less-readily permeable, condensable component upon depressurization and/or cooling of the membrane separation zone. The need is reduced for oversizing the membrane system which reduces treating costs and prevents permeate damage to membrane surfaces caused by condensation of less-readily permeable, condensable components such as C6+ hydrocarbons.</p> |
