| 摘要 |
The present invention pertains to a method for hydroprocessing a heavy hydrocarbon oil, comprising bringing a heavy hydrocarbon oil into contact with hydroprocessing catalyst I in the presence of hydrogen in a first stage, 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 .ANG.), and 10-30% of the total pore volume in pores with a diameter of at least 200 nm (2000 .ANG.), 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, at least 75% of the total pore volume in pores with a diameter of 10-120 nm (100-1200 .ANG.), 0-2% of the total pore volume in pores with a diameter of at least 400 nm (4000 .ANG.), and 0-1% of the total pore volume in pores with a diameter of at least 1000 nm (10000 .ANG.). The method according to the invention combined efficient contaminant removal with high cracking rate and low sediment formation. The invention also pertains to the combination of catalysts.
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