Patent ID: 7897827

Claim:
A process for recovering light olefins during regeneration of an adsorber in an oxygenate removal unit comprising: (a) providing an oxygenate removal unit comprising a plurality of adsorbers, wherein each adsorber comprises a feed end and an effluent end; (b) passing a liquid hydrocarbon feedstock comprising said light olefins to the feed end of at least a first adsorber and removing a product effluent stream from the effluent end of the first adsorber; (c) passing the product effluent stream to a propane/propylene splitter, thereby creating a propylene stream; (d) isolating the first adsorber for regeneration by terminating passage of the liquid hydrocarbon feedstock to the feed end of the adsorber; (e) removing substantially all of the product effluent stream from the first adsorber and transferring to a second adsorber; (f) regenerating the first adsorber and creating a residual effluent stream; and (g) recycling the residual effluent stream to a unit upstream of the oxygenate removal unit.