Chemistry of hydrocarbon compounds – Adding hydrogen to unsaturated bond of hydrocarbon – i.e.,... – Plural hydrogenation stages
Reexamination Certificate
2006-10-03
2006-10-03
Dang, Thuan D. (Department: 1764)
Chemistry of hydrocarbon compounds
Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...
Plural hydrogenation stages
C585S259000
Reexamination Certificate
active
07115789
ABSTRACT:
The present invention is a process for removing alkynes and/or dienes from an olefin product stream withdrawn from an oxygenate-to-olefins reactor. The process comprises hydrogenating a first olefin stream that has alkynes and/or dienes in the presence of excess hydrogen and a first hydrogenation catalyst. The hydrogenation of the first olefin stream produces a second olefin stream that has unreacted hydrogen. The second olefin stream is contacted with a second hydrogenation catalyst producing a third olefin stream. The third olefin stream has low levels of hydrogen and alkynes and/or dienes.
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Kuechler Keith Holroyd
Lumgair, Jr. David R.
Dang Thuan D.
Exxon Mobil Chemical Patents Inc.
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