Catalytic gas-phase oxidation of propene to acrolein

Details Catalytic gas-phase oxidation of propene to acrolein Catalytic gas-phase oxidation of propene to acrolein

C - Chemistry, Metallurgy

07

C

C07C 47/22 (2006.01) B01J 8/06 (2006.01) B01J 23/887 (2006.01) B01J 27/192 (2006.01) C07C 45/35 (2006.01)

Patent

CA 2157631

1. A process for the catalytic gas-phase oxidation of propene to acrolein in a multiple contact tube fixed-bed reactor through whose space surrounding the contact tubes only one heat- exchange medium circuit is passed, at elevated temperature on catalytically active multimetal oxides with a propene conver- sion for a single pass of 90 mol% and an acrolein formation selectivity of 85 mol%, which comprises firstly passing the heat-exchange medium through the multiple contact tube fixed- bed reactor longitudinally, considered over the reaction con- tainer as a whole, to the contact tubes in cocurrent to the reaction-gas mixture and secondly superposing a transverse flow within the reaction container by means of an arrangement of successive baffles along the contact tubes which leaves passage cross sections free, so as to give a meandrous flow of the heat-exchange medium, seen in longitudinal section through the contact tube bundle, and setting the flow rate of the circulated heat-exchange medium so that its temperature rises by from 2 to 10°C between the point of entry into the reactor and the point of exit out of the reactor.

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