Catalysts for oxidative esterification of aldehydes to carboxylic acid esterification complexes

摘要

The present invention relates to a novel method for the oxidative esterification, in general for the conversion of aldehydes with alcohols in the presence of oxygen-containing gases directly to the corresponding ester in the presence of a heterogeneous contact, by which, for example, (meth)acrolein can be converted to methyl(meth)acrylate. The catalysts used according to the invention are characterized in particular by a high mechanical and chemical stability as well as by a good catalytic performance even over very long periods of time. This relates in particular to an improvement in the service life, the activity and selectivity of the catalysts compared with catalysts of the prior art, which lose relatively quickly activity and/or selectivity in continuous operation in media even with low water content. The special feature of this new catalyst according to the invention is that said catalyst comprises titanium dioxide as the main component of the carrier material.