PREPARATION OF RUTHENIUM HYDROGENATION CA TALYSTS

Ruthenium hydrogenation catalysts are of fundamental importance concer ning of their application in cycloolefin preparation by partial hydrog enation of aromatic substrates. The performance of the catalysts, espe cially their activity and selectivity, strongly depends on the prepara tion procedure and the properties of the active component precursor an d support. In addition to the conventional impregnation, incipient-wet ness method, sol-gel technique. and preparation of the metallic ruthen ium black are also discussed. Special attention is paid to the presenc e of impurities, because of their substantial effect on the desired ca talytic properties.