Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations
Reexamination Certificate
2007-05-08
2007-05-08
Nguyen, Tam M. (Department: 1764)
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By plural serial diverse separations
C585S638000, C585S820000, C585S639000
Reexamination Certificate
active
10635410
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 an efficient separation of these components is realized when DME is partially removed in a first separation step comprising methanol and water washing steps, followed by separation of the remaining components in additional separation steps.
REFERENCES:
patent: 4474647 (1984-10-01), Asselineau et al.
patent: 4587373 (1986-05-01), Hsia
patent: 4898717 (1990-02-01), Hsia et al.
patent: 5122236 (1992-06-01), Smith, Jr. et al.
patent: 5336841 (1994-08-01), Adams
patent: 5609734 (1997-03-01), Streicher et al.
patent: 5723686 (1998-03-01), Patton et al.
patent: 5811621 (1998-09-01), van Dijk
patent: 5908964 (1999-06-01), Koskinen et al.
patent: 6121504 (2000-09-01), Kuechler et al.
patent: 6303841 (2001-10-01), Senetar et al.
patent: 6444869 (2002-09-01), Senetar et al.
patent: 6855858 (2005-02-01), Cheng et al.
patent: 2003/0004386 (2003-01-01), Lattner et al.
patent: 2004/0039239 (2004-02-01), Shutt
patent: 2004/0122272 (2004-06-01), Van Egmond et al.
patent: 03/020673 (2003-03-01), None
patent: 03/020678 (2003-03-01), None
U.S. Appl. No. 10/124,859, filed Apr. 18, 2002, Ding et al.
U.S. Appl. No. 10/125,138, filed Apr. 18, 2002, Van Egmond et al.
U.S. Appl. No. 10/292,232, filed Nov. 12, 2002, Ding et al.
Asplin John Ernest
Duhon David Jon
Van Egmond Cornelis F.
ExxonMobil Chemical Patents Inc.
Nguyen Tam M.
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