REMOVING CARBON DIOXIDE FROM AN OXYGENATE TO OLEFINS REACTION EFFLUENT

摘要

The present invention provides processes for removing CO<SUB>2</SUB> from an effluent stream derived from an oxygenate to olefins reaction system. In one embodiment, the invention comprises contacting the effluent stream with a first CO<SUB>2</SUB> removal medium in a first CO<SUB>2</SUB> removal zone under conditions effective to remove a first portion of the CO<SUB>2</SUB> from the effluent stream and form a first CO<SUB>2</SUB> depleted stream. The first CO<SUB>2</SUB> depleted stream is contacted with a second CO<SUB>2</SUB> removal medium in a second CO<SUB>2</SUB> removal zone under conditions effective to remove a second portion of the CO2 from the first CO<SUB>2</SUB> depleted stream and form a second CO<SUB>2</SUB> depleted stream comprising less than about 0.5 vppm CO<SUB>2</SUB>.