Patent ID: 8309776

Claim:
A method for hydrogenating acetylenes in an olefin producing process, said method comprising: (a) stripping an olefin containing hydrocarbon effluent derived from said process in a water stripping tower and a compressor to remove water from the effluent and to condense said effluent; (b) removing oxygenates from said condensed effluent of step (a) to remove unreacted oxygenates from said effluent; (c) hydrogenating the effluent of step (b) by selectively hydrogenating at least a portion of acetylene, oxygen and nitrous oxides; (d) subjecting the effluent of step (c) to a caustic tower/reactor to remove hydrogen sulfide and carbon dioxide; (e) dehydrating the effluent of step (d) and subjecting said effluent to a chilling train to cool and at least partially condense said effluent; and (f) separating the product of step (e) in a downstream separation zone.