Process for heterogeneously catalyzed gas phase partial oxidation of (meth)acrolein to (meth)acrylic acid

摘要

A process for preparing (meth)acrylic acid by heterogeneously catalyzed gas phase partial oxidation of (meth)acrolein over a multimetal oxide composition which comprises the elements Mo, V and W and is obtained by a hydrothermal preparation route, and the multimetal oxide composition obtainable by this preparation route.