A method for the continuous catalytic hydrogenation of hydrogenable compounds to solid, arranged in a fixed bed catalysts with a hydrogen-containing gas

摘要

The present invention relates to the preparation of alicyclic carboxylic acids or derivatives thereof by selective hydrogenation of the corresponding aromatic carboxylic acid (- derivatives) in at least two reactors connected in series, wherein at least one reactor is operated in loop procedure. The volume of the catalysts used are described in the process is set in such a way that required catalyst volume based on the conversion is as low as possible.