초록 ▼

A catalyst for the hydrotreatment of heavy crudes and residues and a method for the preparation thereof are claimed, specifying an amount of Group VIb metallic hydrogenation compound irreversibly absorbed by the silica or alumina extruded support structure surface to be between 0.5 and 3% of the dri

A catalyst for the hydrotreatment of heavy crudes and residues and a method for the preparation thereof are claimed, specifying an amount of Group VIb metallic hydrogenation compound irreversibly absorbed by the silica or alumina extruded support structure surface to be between 0.5 and 3% of the dried and calcined catalyst by weight. The percentage limit on the hydrogenation compound can be achieved by either obtaining a dense alumina support structure having a novel pore diameter distribution, or treating a prior art support with an absorption site restricter such as MgO prior to hydrogenation compound impregnation. Subsequent fabrication steps comprise washing, drying, calcining and presulfurizing. The resultant catalyst has a monolayer of hydrogenating compound deposited on the reaction surface, and interfering compounds such as massive MoO3, Al(MoO4)3 or polymolybdates are not formed. The unimetallic catalyst is demonstrated to be comparable or superior to a bimetallic catalyst employing five times as much hydrogenating metal, and has superior service life due to uniform metal contaminant deposition throughout the catalyst interior.

대표청구항 ▼

A catalyst for the hydrotreatment of heavy crudes and residues, comprising a refractory support material, said support material having a pore volume of about 1 cm3/g, between 40 and 80 percent of said pore volume consisting of pores having diameters greater than 300 Angstroms, said pores having diam

A catalyst for the hydrotreatment of heavy crudes and residues, comprising a refractory support material, said support material having a pore volume of about 1 cm3/g, between 40 and 80 percent of said pore volume consisting of pores having diameters greater than 300 Angstroms, said pores having diameters according to the following approximate percentage distribution: 30 to 35% of pores greater than 1000 Angstroms; 5 to 10% of pores from 300 to 1000 Angstroms; 6 to 11% of pores from 150 to 300 Angstroms; 10 to 12% of pores from 90 to 150 Angstroms; 30 to 40% of pores from 60 to 90 Angstroms; 1 to 7% of pores from 30 to 60 Angstroms; and less than 1% of pores from 20 to 30 Angstroms said support material having a surface area of about 270 to about 290 m2/g; a real density greater than 6 grams per cubic centimeter and a hydrogenating metallic compound, the metal component of said hydrogenating compound being selected from the elements of Group VIb of the Periodic Table, said support material having a limited number of chemical adsorption sites for said hydrogenating metal, such that during impregnation of said support material by a solution containing said hydrogenating compound between 0.5 and 3% by weight of said hydrogenating compound, calculated as oxide of the corresponding Group VIb metal, with respect to the total weight of the catalyst, is irreversibly adsorbed by said support material.