Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2006-07-11
2006-07-11
Keys, Rosalynd (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C585S809000, C585S259000, C585S264000, C585S250000, C585S639000, C585S500000, C203S038000, C203S039000, C203S075000, C203S076000, C203S077000
Reexamination Certificate
active
07074971
ABSTRACT:
The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetylene, methyl acetylene, propadiene, methane, hydrogen, carbon monoxide, carbon dioxide and C4+ components. In one embodiment, the initial effluent stream is provided from a methanol-to-olefin reaction system. It has been discovered that the best separation of these components is realized when DME is selectively removed in a first separation step, followed by separation of the remaining components in additional separation steps.
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Brinen Jeffrey L.
Van Egmond Cor F.
ExxonMobil Chemical Patents Inc.
Keys Rosalynd
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