Process and catalyst for the hydroconversion of a heavy...

B - Operations – Transporting – 01 – J

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B01J 37/02 (2006.01) B01J 23/883 (2006.01) B01J 27/185 (2006.01)

Patent

CA 2539239

A method of hydroprocessing a heavy hydrocarbon feedstock using a hydroprocessing catalyst having specific properties making it effective in the hydroconversion of at least a portion of the heavy hydrocarbon feedstock to lighter hydrocarbons. The hydroprocessing catalyst comprises a Group VIB metal component (e.g., Cr, Mo, and W), a Group VIII metal component (e.g., Ni and Co) and, optionally, a potassium metal component that are supported on a support material comprising alumina. The alumina has novel physical properties that, in combination with the catalytic components, provide for the hydroprocessing catalyst. The hydroprocessing catalyst is particularly effective in the conversion of the heavy hydrocarbon feedstock. The alumina is characterized as having a high pore volume and a high surface area with a large proportion of the pore volume being present in the pores within a narrow pore diameter distribution about a narrowly defined range of median pore diameters. The support material preferably does not contain more than a small concentration of silica. The alumina component is preferably made by a specific method that provides for an alumina having the specific physical properties required for the hydroprocessing catalyst.

L'invention concerne un procédé permettant d'hydrotraiter une charge d'hydrocarbures lourds à l'aide d'un catalyseur d'hydrotraitement doté de propriétés spécifiques qui le rende efficace pour hydroconvertir au moins une partie de la charge d'hydrocarbures lourds en hydrocarbures légers. Le catalyseur d'hydrotraitement comprend un composant métallique du groupe VIB (par exemple, Cr, Mo et W), un composant métallique du groupe VIII (par exemple, Ni et Co) et, éventuellement un composant métallique de potassium, ces composants étant supportés sur un matériau de support comprenant une alumine. Ladite alumine possède de nouvelles propriétés physiques qui, en combinaison avec les composants catalytiques, fournissent le catalyseur d'hydrotraitement. Ce catalyseur d'hydrotraitement est particulièrement efficace pour convertir la charge d'hydrocarbures lourds. L'alumine est caractérisée en ce qu'elle présente un volume de pores et de surface élevé comprenant une grande proportion du volume des pores présents à l'intérieur d'une distribution de diamètres de pores étroite autour d'une plage étroitement définie de diamètres de pores médians. Le matériau de support contient, de préférence, une petite concentration de silice. Le composant d'alumine est, de préférence, produit à l'aide d'un procédé qui confère à ladite alumine les propriétés physiques spécifiques requises pour le catalyseur d'hydrotraitement.

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