Multi-stage hydrodesulfurization process utilizing multi-cycle s

Details Multi-stage hydrodesulfurization process utilizing multi-cycle s Multi-stage hydrodesulfurization process utilizing multi-cycle s

1975-04-28

1976-07-06

Crasanakis, G. J.

Mineral oils: processes and products

Refining

Sulfur removal

C10G 2302

Patent

active

039680312

ABSTRACT:
An asphaltene-containing oil hydrodesulfurization process employing stages in series with an interstage flashing 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 comprises supported Group VI and Group VIII metals without promotion with Group IV-B metal. In the process, deactivated first stage catalyst is replaced at least once without replacing the promoted second stage catalyst so that the promoted second stage catalyst is onstream for at least two first stage catalyst cycles.

REFERENCES:
patent: 3546105 (1970-12-01), Jaffe
patent: 3791967 (1974-02-01), Jaffe
patent: 3840473 (1974-10-01), Beuther et al.
patent: 3859202 (1975-01-01), Brunn et al.

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