Purging of regenerated adsorbent from an oxygenate removal unit

摘要

The processes and systems disclosed herein relate to the removal of contaminants from the effluent of an oxygenate removal unit (ORU). More particularly, the processes and systems disclosed herein relate to the removal of contaminants resulting from the regeneration of adsorbers in an ORU. Processes and systems are provided for regeneration of an adsorber in an oxygenate removal unit comprising: (a) providing an oxygenate removal unit comprising at least one adsorber, wherein the at least one adsorber comprises a feed end and an effluent end; (b) passing a liquid hydrocarbon feedstock to the feed end of the at least one adsorber and removing an effluent stream from the effluent end of the adsorber; (c) isolating the at least one adsorber for regeneration by terminating passage of the liquid hydrocarbon feedstock to the feed end of the adsorber; (d) removing substantially all of the effluent stream from the adsorber; (e) regenerating the adsorber with a regeneration gas; (f) refilling the adsorber with an inventory liquid; and (g) purging the regenerated adsorber with a slipstream of liquid hydrocarbon feedstock to displace the inventory liquid.