Method of preparing high activity hydrotreating catalysts
AssigneeAdvanced Refining Technologies LLC
InventorsJifei JIA, Henry SATERNUS, Xianghua YU, Cecelia RADLOWSKI, Theodorus Ludovicus Michael MAESEN
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Abstract
This disclosure relates to supported multi-metallic catalysts for use in the hydrotreating 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 VIB metal, at least one Group VIII metal and an organic acid. The catalyst precursor is thermally treated to partially decompose the organic acid, then sulfided. The catalysts have a high carbon-as-carboxyl to total carbon ratio (Ccarboxy/Ctotal) as a result of a unique post-metal calcination method employed during the manufacture of the catalyst.
Claims10
A method for preparing a catalyst composition suitable for hydrotreating hydrocarbon feedstocks, the method comprising:
- (a) impregnating an inorganic catalyst support with an aqueous solution containing (i) a salt of a Group VIB metal selected from Mo and W, (ii) a salt of a Group VIII metal selected from Co and Ni, and (iii) an organic acid;
- (b) drying the impregnated catalyst support, thereby resulting in a metal-organic component on a dried catalyst precursor;
- (c) calcining the dried catalyst precursor in an oxygen-containing atmosphere for a time and temperature sufficient to oxidize some but not all of the organic portion of the metal-organic component, thereby resulting in a partially oxidized catalyst precursor having (i) a loss-on-ignition of greater than 1 to 20 wt. % and (ii) a carbon-as-carboxyl to total residual carbon ratio (Ccarboxy/Ctotal) of at least 0.10 as determined by X-ray photoelectron spectroscopy;
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- (d) sulfiding the partially oxidized catalyst precursor at sulfiding conditions in the presence of a sulfiding agent, thereby resulting in a sulfided catalyst composition.
Dependencies are inferred from the claim text.