▎ 摘　　要

NOVELTY - Grading of hydrofining catalyst involves dividing hydrogenation reactor into five hydrogenation reaction zones, filling hydrogenation protection agent into hydrogenation reaction zone (A), filling hydrorefining catalyst (A) into hydrogenation reaction zone (B), filling hydrorefining catalyst (B) into hydrogenation reaction zone (C), filling hydrorefining catalyst (C) into hydrogenation reaction zone (D) and filling hydrorefining catalyst (D) into hydrogenation reaction zone (E) and performing hydrogenation reaction. The hydrogenation protection agent is supported catalyst comprising gamma -aluminum oxide as carrier, and molybdenum and group VIII metals as active components. The supported catalyst comprises 80-98 wt.% gamma -aluminum oxide and 5-20 wt.% active component. The hydrorefining catalyst (A) is supported molybdenum-nickel catalyst comprising 45-78 wt.% gamma -aluminum oxide, 1-10 wt.% zirconium dioxide, 1-10 wt.% lanthanum oxide and 20-35 wt.% active component. USE - Grading of hydrofining catalyst used for diesel hydrotreatment (claimed) to form hydrogen-rich gas and liquid product used as steam cracking feedstock or diesel component. DETAILED DESCRIPTION - Grading of hydrofining catalyst involves dividing hydrogenation reactor into five hydrogenation reaction zones according to flow direction of the stream, filling hydrogenation protection agent into hydrogenation reaction zone (A), filling hydrorefining catalyst (A) into hydrogenation reaction zone (B), filling hydrorefining catalyst (B) into hydrogenation reaction zone (C), filling hydrorefining catalyst (C) into hydrogenation reaction zone (D) and filling hydrorefining catalyst (D) into hydrogenation reaction zone (E) and performing hydrogenation reaction. The hydrogenation protection agent is supported catalyst comprising gamma -aluminum oxide as carrier, and molybdenum and group VIII metals as active components. The supported catalyst comprises 80-98 wt.% gamma -aluminum oxide and 5-20 wt.% active component. The hydrorefining catalyst (A) is supported molybdenum-nickel catalyst comprising 45-78 wt.% gamma -aluminum oxide, 1-10 wt.% zirconium dioxide, 1-10 wt.% lanthanum oxide and 20-35 wt.% active component. The hydrorefining catalyst (B) is supported molybdenum-nickel catalyst comprising 1-30 wt.% TS-1 molecular sieve, 20-50 wt.% gamma -aluminum oxide, 0.01-10 wt.% zirconia, 0.01-5 wt.% graphene and 10-40 wt.% active component. The hydrorefining catalyst (C) is supported tungsten-nickel catalyst comprising 64-74 wt.% gamma -aluminum oxide and 26-36 wt.% active component. The hydrorefining catalyst (D) is supported nickel catalyst comprising 1-10 wt.% zirconium dioxide, 1-10 wt.% cerium dioxide, 0.1-1 wt.% iridium dioxide, 0.1-2 wt.% bismuth trioxide, 1-5 wt.% phosphorus pentoxide, 20-40 wt.% nickel as active component and balance gamma -aluminum oxide. An INDEPENDENT CLAIM is included for diesel hydrotreating method to form hydrogen-rich gas and liquid products.