Removing carbon dioxide from an oxygenate to olefins...

Details Removing carbon dioxide from an oxygenate to olefins... Removing carbon dioxide from an oxygenate to olefins...

2008-06-17

2008-06-17

Griffin, Walter D. (Department: 1797)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

C585S820000, C585S821000

Reexamination Certificate

active

07388120

ABSTRACT:
The present invention provides processes for removing CO2from an effluent stream derived from an oxygenate to olefins reaction system. In one embodiment, the invention comprises contacting the effluent stream with a first CO2removal medium in a first CO2removal zone under conditions effective to remove a first portion of the CO2from the effluent stream and form a first CO2depleted stream. The first CO2depleted stream is contacted with a second CO2removal medium in a second CO2removal zone under conditions effective to remove a second portion of the CO2from the first CO2depleted stream and form a second CO2depleted stream comprising less than about 0.5 vppm CO2.

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