C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 57/055 (2006.01) B01J 8/06 (2006.01) C07C 51/235 (2006.01) C07C 51/25 (2006.01)
Patent
CA 2157632
A process for the catalytic gas-phase oxidation of acrolein to acrylic acid 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 catalyti- cally active multimetal oxides with an acrolein conversion for a single pass of 95 mol% and an acrylic acid formation selectiv- ity of 90 mol%, which comprises firstly passing the heat- exchange medium through the multiple contact tube fixed-bed reac- tor longitudinally, considered over the reaction container as a whole, to the contact tubes in cocurrent to the reaction-gas mix- ture and secondly superposing a transverse flow within the reac- tion 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 set- ting 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.
Hammon Ulrich
Ruppel Wilhelm
Tenten Andreas
Wegerle Ulrike
Basf Aktiengesellschaft
Robic
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