HYDROTREATING CATALYST FOR HEAVY OIL, CARRIER FOR THE CATALYST, AND PROCESS FOR THE PREPARATION OF THE CATALYST

摘要

A catalyst for hydrogenating heavy oils comprises an alumina carrier and a Group 6 metal component supported together with a Group 9 or 10 metal component on the carrier. The alumina carrier contains silica in an amount of 0.5 to 20 wt% in relation to catalyst weight. Silica is dispersed in the carrier as a silica moiety with a mean particle diameter of 0.05 to 1 mu m. The catalyst has a pore diameter distribution such that the median pore diameter of pores having diameters of 600 ANGSTROM or less is 70 ANGSTROM or greater but less than 150 ANGSTROM . Excellent denitrogenation characteristics and desulfurization characteristics are maintained for a long time when a hydrodemetallated heavy oil is hydrogenated.