Removing carbon dioxide from an oxygenate to olefins reaction effluent

摘要

The present invention provides processes for removing CO₂ 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 CO₂ removal medium in a first CO₂ removal zone under conditions effective to remove a first portion of the CO₂ from the effluent stream and form a first CO₂ depleted stream. The first CO₂ depleted stream is contacted with a second CO₂ removal medium in a second CO₂ removal zone under conditions effective to remove a second portion of the CO₂ from the first CO₂ depleted stream and form a second CO₂ depleted stream comprising less than about 0.5 vppm CO₂.