CATALYST FOR SELECTIVE HYDROGENATION OF HIGHLY UNSATURATED HYDROCARBON COMPOUND IN OLEFIN COMPOUND

摘要

A palladium-base catalyst which can selectively hydrogenate highly unsaturated hydrocarbon compounds contained in small amounts in an olefin compound prepared by steam cracking or the like of naphtha without causing hydrogenation of the olefin as a side reaction and the precipitation of a carbonaceous material. The catalyst comprises palladium and alumina, and the exposed face of each palladium crystallite is mainly accounted for by (100) and (110) faces. Further, in the desorption of adsorbed hydrogen by heating, desorption peaks are observed in the temperature ranges of 40 to 90 °C and of 120 to 170 °C and the ratio of hydrogen desorption amount of the former to the latter is (4 : 6) to (3 : 7).