Hydrodesulfurization catalyst

B - Operations – Transporting – 01 – J

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252/63.A

B01J 23/84 (2006.01) B01J 21/04 (2006.01) B01J 21/06 (2006.01) B01J 23/85 (2006.01) B01J 35/02 (2006.01)

Patent

CA 1104997

HYDRODESULFURIZATION CATALYST Abstract of the Disclosure A catalyst having utility as a downstream catalyst in processes for hydrodesulfurization of asphaltene-containing petroleum oils, coal liquids, shale oil or oils from tar sands which employ both upstream and downstream catalysts in series. The downstream catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of a Group IV-B metal. The particles of said promoted catalyst are elongated extrudates whose surface is provided with a plurality of alternating longitudinal grooves and protrusions. In processes using this catalyst, the upstream catalyst comprises Group VI and Group VIII metals without promotion with Group IV-B metal and the particles of the upstream catalyst may or may not have similar surface grooves. The adapta- tion of the grooved particle configuration to the promoted catalyst composition provided the early development of a plateau-like aging curve which was not achieved by the adaptation of the grooved shape to a non-promoted catalyst. -1-

301420

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