To highly hydrogenate a heavy oil and remarkably decrease the sulfur content, etc., of a crude heavy oil while minimizing the loss of fraction caused by excessive decomposition by carrying out hydrogenative isomerizing desulfurization treatment of a heavy oil in the presence of a hydrogenative isomerizing desulfurization catalyst.
A heavy oil such as asphalt oil is hydrogenated by the hydrogenative isomerizing desulfurization treatment of the oil in the presence of a hydrogenative isomerizing desulfurization catalyst comprising at least one kind of metal selected from the group 6 and the groups 8-10 elements of the periodic table (e.g. Ni/Mo) and phosphorus supported on a carrier preferably containing an acid-treated zeolite preferably at a reaction temperature of 360-420°C under partial hydrogen pressure of 100-180 kg/cm2G. The above catalyst preferably contains 5-90 wt.% acid-treated zeolite in terms of carrier, 2-40 wt.% supported metal in the catalyst in terms of oxide based on the catalyst and 1-10 wt.% phosphorus in terms of oxide based on the catalyst.
KAGAMI SHIGEARI
SAKOTA YUKIHIRO
INAMURA KAZUHIRO
UCHIKAWA HIROSHI
PETROLEUM ENERGY CENTER FOUND