Patent ID: 8178061
Filing Date: 2012-05-15
Classification: B01D,C07C,F25J,Y02P

Abstract:
1. A system for recovering light olefins during regeneration of an adsorber in an oxygenate removal unit comprising: (a) a depropanizer upstream of an oxygenate removal unit; (b) an oxygenate removal unit comprising a plurality of adsorbers, wherein each adsorber comprises a feed end and an effluent end; (c) a supply of a liquid hydrocarbon feedstock that is fed to the feed end of at least a first adsorber; (d) a device that isolates the first adsorber from the system by terminating passage of the liquid hydrocarbon feedstock to the feed end of the first adsorber; (e) a transfer line operatively connected to the effluent end of the first adsorber that provides for removal of an effluent stream from the effluent end of the first adsorber and transfers substantially all of the removed effluent stream to a second adsorber; (f) a second adsorber that receives substantially all of the effluent stream from the first adsorber when the first adsorber is isolated for regeneration; (g) a recycle line that transfers residual effluent stream to an upstream operation unit.