METHOD OF HYDROCRACKING PETROLEUM DISTILLATE

摘要

PURPOSE: To obtain high-quality kerosene or gas oil in good yields by hydrotreating a heavy petroleum distillate and hydrocracking the treated distillate in the presence of a specified hydrocracking catalyst. CONSTITUTION: A catalyst support obtained by molding, drying and firing a composite gel obtained by mixing or depositing an aluminum oxide hydrate with or on a silica-zirconia hydrogel obtained by depositing zirconium hydroxide on a silica hydrogel is impregnated with metals of groups VI and VII in the periodic table to obtain a hydrocracking catalyst having a mean pore diameter of 5-10nm. A heavy petroleum distillate having a boiling point of 250-600 deg.C is hydrotreated in the presence of a hydrotreatment catalyst to obtain a petroleum distillate having a nitrogen content of 1000mass ppm or below. This distillate is hydrocracked in the presence of the hydrocracking catalyst under conditions including a temperature of 300-500 deg.C, a reaction pressure of 5-20MPa, an LHSV of 0.05-2h<-1> and a hydrogen/oil ratio of 200-1500Nm<3> /m<3> .