초록 ▼

Disclosed is a two-stage catalytic process for hydrodemetallation and hydrodesulfurization of heavy hydrocarbon streams containing asphaltenes and a substantial amount of metals. The first stage of this process comprises contacting the feedstock in a first reaction zone with hydrogen and a demetalla

Disclosed is a two-stage catalytic process for hydrodemetallation and hydrodesulfurization of heavy hydrocarbon streams containing asphaltenes and a substantial amount of metals. The first stage of this process comprises contacting the feedstock in a first reaction zone with hydrogen and a demetallation catalyst comprising hydrogenation metal selected from Group VIB and/or Group VIII deposed on a large-pore, high surface area inorganic oxide support; the second stage of the process comprises contacting the effluent from the first reaction zone with a catalyst consisting essentially of hydrogenation metal selected from Group VIB deposed on a smaller pore, catalytically active support comprising alumina, said second stage catalyst having a surface area within the range of about 150 m2/gm to about 300 m2/gm, having a majority of its pore volume in pore diameters within the range of about 80 A to about 130 A, and the catalyst has a pore volume within the range of about 0.4 cc/gm to about 0.9 cc/gm.

대표청구항 ▼

A process for the hydrodemetallation and hydrodesulfurization of a hydrocarbon feedstock containing asphaltenes and a substantial amount of metals, said feedstock comprising at least one member selected from the group consisting of crude oil, topped crude oil, petroleum hydrocarbon residua, oils obt

A process for the hydrodemetallation and hydrodesulfurization of a hydrocarbon feedstock containing asphaltenes and a substantial amount of metals, said feedstock comprising at least one member selected from the group consisting of crude oil, topped crude oil, petroleum hydrocarbon residua, oils obtained from tar sands, residua derived from tar sands oil, and hydrocarbon streams derived from coal, which process comprises: (a) contacting said feedstock in a first reaction zone with hydrogen and a first-stage catalyst comprising hydrogenation metal component selected from the group consisting of a Group VIB metal, a Group VIII metal, and a mixture of said Group VIB and Group VIII metals, and a porous inorganic oxide support, said hydrogenation metal being in at least one form selected from the group consisting of the elemental form, the oxide, and the sulfide, and said catalyst having a surface area of about 120 m2/gm to about 400 m2/gm, a pore volume of about 0.7 cc/gm to about 1.5 cc/gm, and an average pore diameter of about 125 A to about 350 A; and (b) contacting the effluent from said first reaction zone in a second reaction zone with a second-stage catalyst consisting essentially of at least one active original hydrogenation metal selected from Group VIB deposed on a catalytically active support comprising alumina, said Group VIB metal being in at least one form selected from the group consisting of the elemental form, the oxide, and the sulfide, said catalyst having a surface area within the range of about 150 m2/gm to about 300 m2/gm, having a majority of its pore volume in pore diameters within the range of about 80 A to about 130 A, and a pore volume within the range of about 0.4 cc/gm to about 0.9 cc/gm.