Multi-reactor hydrodesulfurization process

Details Multi-reactor hydrodesulfurization process Multi-reactor hydrodesulfurization process

C - Chemistry, Metallurgy

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C10G 45/04 (2006.01) B01J 23/85 (2006.01) B01J 35/10 (2006.01) C10G 45/08 (2006.01) C10G 65/04 (2006.01)

Patent

CA 1122556

MULTI-REACTOR HYDRODESULFURIZATION PROCESS Abstract of the Disclosure An asphaltene-containing oil hydrodesulfurization process employing upstream and downstream reactors in series with an inter- stage flashing step. The catalyst in the downstream reactor com- prises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The particles of the catalyst in the downstream reactor are in the form of extrudates whose sur- face is provided with a plurality of alternating longitudinal grooves and protrusions. The catalyst in the upstream reactor comprises Group VI and Group VIII metals without promotion with Group IV-B metal and is in the form of particles whose surface may or may not have a similar grooved form. An advantageous mass velocity-related activity effect has been found when the downstream reactor has a diameter which is smaller than the diameter of the upstream reactor. The reduced diameter provides a concomitant advantage related to hydrogen pressure since it is shown that the reduced diameter permits the downstream reactor to withstand en- hanced pressures and it is also shown that the promoted catalyst is particularly susceptible to regeneration via increases in hydrogen pressure. -1-

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