PROCESS FOR PREPARING CARBOXAMIDES BY HYDROLYSIS OF CARBOXYLIC ACID NITRILES IN THE PRESENCE OF A CATALYST COMPRISING MANGANESE DIOXIDE

摘要

The present invention relates to a process for preparing carboxamides by hydrolysis of carboxylic acid nitriles in the presence of a catalyst comprising manganese dioxide, in which the reaction mixture added to the catalyst comprising manganese dioxide has a pH in the range from 6.0 to 11.0 and the hydrolysis is carried out in the presence of an oxidant. The present invention further relates to a process for preparing alkyl (meth)acrylates, which process has a hydrolysis step as per the above-described process.