Multi-stage desulfurization process utilizing multi-cycle...

Details Multi-stage desulfurization process utilizing multi-cycle... Multi-stage desulfurization process utilizing multi-cycle...

C - Chemistry, Metallurgy

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196/105, 196/136

C10G 45/00 (2006.01) B01J 23/85 (2006.01) C10G 45/08 (2006.01) C10G 65/04 (2006.01)

Patent

CA 1076054

Abstract An asphaltene-containing oil hydrodesulfurization process employing stages in series with an interstage flash- ing step. The second stage catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The first stage catalyst com- prises supported Group VI and Group VIII metals without pro- motion with Group IV-B metal. In the process, deactivated first stage catalyst is replaced at least once without re- placing the promoted second stage catalyst so that the pro- moted second stage catalyst is onstream for at least two first stage catalyst cycles.

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