Chemistry of hydrocarbon compounds – Adding hydrogen to unsaturated bond of hydrocarbon – i.e.,... – Plural hydrogenation stages
Reexamination Certificate
2006-05-02
2006-05-02
Dang, Thuan D. (Department: 1764)
Chemistry of hydrocarbon compounds
Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...
Plural hydrogenation stages
C585S258000, C585S259000, C585S261000
Reexamination Certificate
active
07038097
ABSTRACT:
It has been discovered that a dual bed process using two different catalysts for the selective hydrogenation of acetylene and/or methyl acetylene (MA) and/or propadiene (PD) in a light olefin-rich feedstream can be accomplished with less selectivity to making oligomers (green oil) as compared with existing commercial technologies, if a low oligomers selectivity catalyst is used first in the process. A palladium catalyst may be used as a second, sequential catalyst to further hydrogenate acetylene and/or MAPD while consuming at least a portion of the balance of the hydrogen present. The first catalyst should be different from the second catalyst.
REFERENCES:
patent: 3580837 (1971-05-01), Pollitzer
patent: 3689401 (1972-09-01), Gomi et al.
patent: 3770619 (1973-11-01), Derrien et al.
patent: 3969221 (1976-07-01), Mitchell, III et al.
patent: 4013548 (1977-03-01), Pollitzer et al.
patent: 4113603 (1978-09-01), Bauer
patent: 5227553 (1993-07-01), Polanek et al.
patent: 5817901 (1998-10-01), Trambouze et al.
patent: 2002/0004622 (2002-01-01), Dai et al.
patent: 2002/0022754 (2002-02-01), Boyer et al.
patent: 2002/0068843 (2002-06-01), Dai et al.
patent: 0541871 (1993-05-01), None
patent: 1432096 (1976-04-01), None
patent: 2131043 (1984-06-01), None
McGown, et al.,Hydrogenation of Acetylene in Excess Ethylene on an Alumina-Supported Palladium Catalyst at Atmospheric Pressure in a Spinning Basket Reactor, Journal of Catalysis 51, pp. 173-184 (1978).
Battison, et al.,Performance and Aging of Catalysts for the Selective Hydrogenation of Acetylene: A Micropilot-Plant Study, Applied Catalysis 2, pp. 1-17 (1982).
LeViness, Stephen Claude.Polymer formation, deactivation, and ethylene selectivity decline in Pd/A1203 catalyzed selective acetylene hydrogenation, Rice University, pp. 211-259 (1989).
Buchanan John Scott
Molinier Michel
Ou John Di-Yi
Risch Michael A.
Dang Thuan D.
ExxonMobil Chemical Patents Inc.
Griffis Andrew B.
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