Web Release Date: February 22,
Direct Gas-Phase Epoxidation of Propene with Hydrogen Peroxide on TS-1 Zeolite in a Microstructured Reactor
and
Department of Chemical Technology, Chemnitz University of Technology, Strasse der Nationen 62, 09111 Chemnitz, Germany; Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany; Service Unit Process Technology & Engineering, Evonik Degussa, Rodenbacher Chaussee 4, 63457 Hanau-Wolfgang, Germany; and Research and Development, Uhde GmbH, Friedrich Uhde Str. 15, 44141 Dortmund, Germany
Received for review October 5, 2007
Revised manuscript received January 9, 2008
Accepted January 31, 2008
Abstract:
Direct epoxidation of propene with hydrogen peroxide vapor was conducted in a microstructured reactor
containing TS-1 catalyst coatings. At 140 
C, 1 bar, 5 vol % hydrogen peroxide, and 15 vol % propene,
productivities of more than 1 kg of propene oxide per kg of catalyst and hour are obtained in lab scale, which
is in an industrially highly relevant range. Excellent selectivities to propene oxide based on propene of >90%
were reached. Potential and need for improvement lie in the propylene oxide selectivity based on hydrogen
peroxide, which was observed to be about 25%. By increasing the molar excess of propene to about 6.6,
propylene oxide selectivities related to hydrogen peroxide of up to 60% have been observed in the pilot
plant.
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