초록 ▼

A catalyst for the hydrotreatment of heavy crudes and their residues, and a method of preparing same, is disclosed, which has significant simultaneous hydrodemetallizing and hydrodesulfurizing activity. The catalyst is prepared by successively impregnating an extruded refractory support with a Group

A catalyst for the hydrotreatment of heavy crudes and their residues, and a method of preparing same, is disclosed, which has significant simultaneous hydrodemetallizing and hydrodesulfurizing activity. The catalyst is prepared by successively impregnating an extruded refractory support with a Group VIb and a Group VIII metal, calcining the pellet thus produced, and presulfurizing same. Pore volume of the catalyst ranges between 0.50 and 1.2 ml/g, total surface area ranges between 120 and 400 m2/g, at least 60% of said pore volume consists of pores having diameters greater than 100 Å, and X-ray photoelectron spectroscopy signal band strength ratios are as follows: I(Me VIb)/I(refractory metal) is between 5 and 8, and I(Me VIII)/I(refractory metal) is between 1 and 5. The novel catalyst has a useful life greater than conventional catalysts for the simultaneous hydrodemetallization and hydrodesulfurization of continuous feeds of heavy hydrocarbons, as shown by the fact that it exhibits no substantial reduction in catalytic activity over an 80 day period.

대표청구항 ▼

A catalyst for the simultaneous demetallization and desulfurization of heavy crudes and residues, comprising an alumina support material, said support being impregnated by a first impregnating compound; said impregnated support is subsequently impregnated by a second impregnating compound, said firs

A catalyst for the simultaneous demetallization and desulfurization of heavy crudes and residues, comprising an alumina support material, said support being impregnated by a first impregnating compound; said impregnated support is subsequently impregnated by a second impregnating compound, said first impregnating compound consisting essentially of a metallic compound whose metallic component is selected from Group VIb of the Periodic Table, deposited on said support material so as to comprise from 5 to 30% of the catalyst by weight, calculated as oxide; said second impregnating consisting essentially of a metallic compound whose metallic component is selected from Group VIII of the Periodic Table, deposited on said support material so as to comprise from 0.1 to 8% of the catalyst by weight, calculated as oxide; said first and second impregnating compounds being reacted with a sulfur-containing reagent after deposition so as to produce catalytically active sulfides whereby a catalyst characterized by simultaneous demetallizing and desulfurizing activity wherein the ratio of percent of demetallizing to desulfurizing approaches unity over a useful life in excess of 80 days is obtained, said catalyst having the following physical properties: a total pore volume ranging from about between 0.8 to 0.9 ml/g, an average pore diameter of about between 200 to 300 Åand signal band strength ratios, as determined by X-ray photoelectron spectroscopy, as follows: I(Me VIb)/I(refractory metal) is between 5 and 8 and I(Me VIII)/I(refractory metal)is between 1 and 5.