METHOD FOR PRODUCING UNSATURATED ALDEHYDE, AND APPARATUS FOR PRODUCING UNSATURATED ALDEHYDE

WIPO Patent Application WO/2024/080203

A1

The present invention relates to a method for producing a corresponding unsaturated aldehyde by partially oxidizing an alkene using a fixed-bed multi-tube type reactor. The fixed-bed multi-tube type reactor includes a plurality of reaction tubes and a reaction bath that controls the temperature of the plurality of reaction tubes. The reaction tube is provided with at least two catalyst layers in a gas flow direction. Assuming that the reaction bath temperature at which the yield of unsaturated aldehyde is maximized is set as A (°C), and the reaction bath temperatures at which the yield is 1.0% points lower than the maximum are set as A1 (°C) and A2 (°C), the following expressions (1) and (2) are satisfied. (1): A1