MECHANICALLY STABLE HOLLOW-CYLINDRICAL MOULDED CATALYST BODY FOR THE GAS PHASE OXIDATION OF AN ALKENE IN ORDER TO OBTAIN AN UNSATURATED ALDEHYDE AND/OR AN UNSATURATED CARBOXYLIC ACID

摘要

The invention relates to a hollow-cylindrical moulded catalyst body for the gas phase oxidation of an alkene in order to obtain an α,β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid, comprising a compacted multi-metal oxide and having an outer diameter AD, an inner diameter ID and a height H, where AD is selected in the range of 3.5 to 4.5 mm, the ratio of q = ID/AD is selected in the range of 0.4 to 0.55, and the ratio of p = H/AD is selected in the range of 0.5 to 1. The moulded catalyst body is mechanically stable and catalyses the partial oxidation of an alkene so as to produce products of value with high selectivity. It guarantees a sufficiently high catalyst mass density for the pelletised catalyst material, as well as a good degree of long-term stability at an acceptable level of pressure loss.