Hydrodesulfurization process with parallel first stages in serie

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

1975-04-28

1976-07-06

Crasanakis, G. J.

Mineral oils: processes and products

Refining

Sulfur removal

C10G 2302

Patent

active

039680266

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.

REFERENCES:
patent: 3418234 (1968-12-01), Chervenak et al.
patent: 3563886 (1971-02-01), Carlson et al.
patent: 3840473 (1974-10-01), Beuther et al.
patent: 3871998 (1975-03-01), Rase et al.

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