Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations
Reexamination Certificate
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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Campanell Frank C
ExxonMobil Chemical Patents Inc.
Griffin Walter D.
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