Hydrodesulfurization process employing a guard chamber

Details Hydrodesulfurization process employing a guard chamber Hydrodesulfurization process employing a guard chamber

1975-11-17

1977-10-11

Crasanakis, George

Mineral oils: processes and products

Refining

Sulfur removal

208251H, C10G 2302

Patent

active

040533913

ABSTRACT:
A process for hydrodesulfurizing a residual oil by passing the oil downwardly through a catalytic reaction zone at a hydrogen pressure which is sufficiently high that demetallization occurs rapidly so that at end-of-run the upstream catalyst region is more nearly metals-saturated than the downstream catalyst region. At the end of the catalyst cycle, the more nearly metals-saturated upstream portion of the catalyst is removed from the process while the less nearly metals-saturated downstream portion of the catalyst is passed to a guard chamber where during further operation of the process it approaches metals-saturation. In this manner, no portion of catalyst is removed from the process until it has an elevated metals content.

REFERENCES:
patent: B501317 (1976-01-01), Milstein
patent: 3530066 (1970-09-01), Kuwata et al.
patent: 3563886 (1971-02-01), Carlson et al.
patent: 3563887 (1971-02-01), Fraser et al.
patent: 3702238 (1972-11-01), Armistead et al.
patent: 3795607 (1974-03-01), Adams et al.
patent: 3809644 (1974-05-01), Johnson et al.

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