process for the production of ungesaettigten carbonsaeuren from the corresponding ungesaettigten aldehydes

摘要

A process for preparing unsaturated carboxylic acids which comprises reacting the corresponding unsaturated aldehydes with molecular oxygen in the presence of a catalyst consisting essentially of (a) molybdenum, (b) phosphorous, (c) at least one element selected from the group consisting of tungsten and magnesium, (d) at least one element selected from the group consisting of vanadium and bismuth, and (e) oxygen.