Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Reexamination Certificate
2011-03-22
2011-03-22
Singh, Prem C (Department: 1771)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
C585S001000, C585S312000, C585S324000, C585S327000, C585S640000, C585S641000, C585S649000, C585S809000, C585S811000, C585S856000, C585S864000
Reexamination Certificate
active
07910786
ABSTRACT:
Isobutene is prepared by a process in which a) an MTBE-containing stream I is separated by distillation into an MTBE-containing overhead stream II and a bottom stream III which comprises compounds having boiling points higher than that of MTBE; and b) the MTBE present in the overhead stream II is dissociated over a catalyst to give a dissociation product IV; wherein the stream I has a proportion of 2-methoxybutane (MSBE) of greater than 1000 ppm by mass, based on MTBE, and wherein the separation by distillation in step a) and/or the dissociation in step b) is carried out so that the dissociation product IV has a concentration of less than 1000 ppm by mass of linear butenes, based on a C4-olefin fraction.
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Büschken Wilfried
Fernandez Silvia Santiago
Houbrechts Stephan
Luh Walter
Maschmeyer Dietrich
Evonik Oxeno GmbH
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Singh Prem C
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