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US 7,538,066 B2Granted
Method of preparing a hydrotreating catalyst on a support containing a rare earth metal
AssigneeExxonMobil Research and Engineering Company
InventorsStuart L. Soled, Sabato Miseo, Joseph E. Baumgartner, Christine E. Kliewer, Jeffrey T. Elks
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Abstract
This invention relates to supported multi-metallic catalysts for use in the hydroprocessing of hydrocarbon feeds, as well as a method for preparing such catalysts. The catalysts are prepared from a catalyst precursor comprised of at least one Group VIII metal and a Group VI metal and an organic agent selected from the group consisting of amino alcohols and amino acids.
Claims33
A method for preparing a catalyst composition, which method comprises:
- (a) impregnating an inorganic catalyst support with an effective amount of a salt of a metal selected from the rare earth metals and yttrium;
- (b) drying said impregnated catalyst support to remove substantially all water;
- (c) calcining said dried impregnated catalyst support to produce a modified catalyst support;
- (d) impregnating said modified catalyst support with an aqueous solution having a pH of greater than 3.8 containing
- (i) a salt of a Group VIII metal selected from Co and Ni,
- (ii) a salt of a Group VI metal selected from Mo and W, and
- (iii) an effective amount of an organic agent selected from amino alcohols and amino acids;
- (e) drying said impregnated modified catalyst support to remove substantially all water, thereby resulting in a metal-organic on catalyst support precursor;
- (f) calcining said dried modified catalyst precursor at calcination temperatures and in an oxygen-containing atmosphere wherein at least a portion of the organic portion of the catalyst precursor is oxidized;
- (g) sulfiding said partially oxidized catalyst precursor at sulfiding conditions in the presence of a sulfiding agent, thereby resulting in a sulfided catalyst composition.
7 more elements
A method for preparing a catalyst composition, which method comprises:
- (a) impregnating an inorganic catalyst support with an effective amount of a salt of a metal selected from the rare earth metals and yttrium;
- (b) drying said impregnated catalyst support to remove substantially all water;
- (c) calcining said dried impregnated catalyst support to produce a modified catalyst support;
- (d) impregnating the modified catalyst support with an aqueous solution containing:
- (i) a first metal selected from the Group VIII metal selected from Co and Ni and a Group VI metal selected from Mo and W, and
- (ii) an effective amount of an organic agent selected from amino alcohols and amino acids, wherein the choice of said first metal from Group VIII and Group VI leaves the remaining choice as a second metal;
- (e) calcining said dried impregnated catalyst support to produce a modified catalyst support;
- (f) drying said impregnated rare earth modified catalyst support to remove substantially all water, thereby resulting in a substantially dried catalyst precursor comprised of a first metal-organic component on support;
- (g) impregnating said partially oxidized catalyst precursor with an aqueous solution having a pH of greater than 3.8 comprised of a salt of said second metal and an effective amount of an organic agent selected from the group consisting of amino alcohols and amino acids;
- (h) drying said impregnated catalyst precursor of step (g) to remove substantially all water, thereby leaving a partially oxidized catalyst precursor further containing a second metal-organic component;
- (i) calcining said dried catalyst precursor at calcination temperatures in the presence of an oxygen-containing atmosphere wherein at least a portion of the organic portion of the catalyst precursor is oxidized;
- (j) sulfiding said final partially oxidized catalyst precursor composition at effective sulfidation conditions in the presence of a sulfiding agent to produce a sulfided catalyst composition.
9 more elements
Dependencies are inferred from the claim text.