Two-stage hydroprocessing process and catalyst

摘要

The present invention pertains to a method for hydroprocessing a heavy hydrocarbon oil, comprising bringing a heavy hydrocarbon oil in a first stage into contact with hydroprocessing catalyst I in the presence of hydrogen, after which the effluent of the first stage is contacted in whole or in part with hydroprocessing catalyst II in the presence of hydrogen, wherein catalyst I comprises 7 to 20 wt. % of a Group VIB metal component, calculated as trioxide on the weight of the catalyst, and 0.5 to 6 wt.% of a Group VIII metal component, calculated as oxide on the weight of the catalyst, on a porous inorganic carrier, said catalyst having a specific surface area of at least 100 m2/g, a total pore volume of at least 0.55 ml/g, at least 50 % of the total pore volume in pores with a diameter of at least 20 nm (200 A) and at least 65 % of the total pore volume in pores with a diameter of 10 - 120 nm (100-1 200 A), and catalyst II comprises 7 to 20 wt.% of a Group VIB metal component calculated as trioxide on the weight of the catalyst, and 0.5 to 6 wt.% of a Group VIII metal component, calculated as oxide on the weight of the catalyst, on a porous inorganic carrier, said catalyst having a specific surface area of at least 100 m2/g, a total pore volume of at least 0.55 ml/g, 30 - 80 % of the pore volume in pores with a diameter of 10 - 20 nm (100-200 A), and at least 5 % of the pore volume in pores with a diameter of at least 100 nm (1 000 A) with catalyst I having a larger percentage of its pore volume in pores with a diameter of at least 20 nm (200 A) than catalyst II.