Hydrodesulfurization process with parallel first stages in...

Details Hydrodesulfurization process with parallel first stages in... Hydrodesulfurization process with parallel first stages in...

C - Chemistry, Metallurgy

10

G

196/105, 196/136

C10G 45/00 (2006.01) B01J 23/85 (2006.01) C10G 45/08 (2006.01) C10G 65/00 (2006.01)

Patent

CA 1076053

Abstract An asphaltene-containing oil hydrodesulfurization process employing parallel first stages in series with a unified second stage. The second stage catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The catalyst in the first stage comprises supported Group VI and Group VIII metals without promotion with Group IV-B metal. In the process, deactivated non-promoted catalyst is replaced at least once from at least one of the parallel first stages while continuing to operate the other of the parallel first stages to supply a reduced oil flow to the second stage during the catalyst replacement step.

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