CATALYST FOR PRODUCTION OF UNSATURATED ALDEHYDE AND UNSATURATED CARBOXYLIC ACID AND PROCESS FOR PRODUCING THE SAME

摘要

A catalyst for producing from an olefin the corresponding unsaturated aldehyde and unsaturated carboxylic acid in high yield. It is a composite oxide catalyst for use in a process in which an olefin is catalytically oxidized in a vapor phase with a gas containing molecular oxygen to produce the corresponding unsaturated aldehyde and the corresponding unsaturated carboxylic acid. The catalyst contains at least molybdenum, bismuth, and iron and has a loss of water on drying, which is represented by the following equation (1) (wherein W1 is the weight of the catalyst after 2-hour heating at 110±5°C and W2 is the weight of the catalyst before the heating), of 0.5 wt.% or less. loss on drying = (W2-W1)/W2 x 100 (1)