Multiple stage hydrodesulfurization process with extended downst

Mineral oils: processes and products – Refining – Sulfur removal

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C10G 2302

Patent

active

040160700

ABSTRACT:
A multiple stage process for hydrodesulfurizing a residual oil while passing the oil downwardly through a plurality of stages in series with an interstage flashing step. After the catalyst in the downstream stage is deactivated by coke deposition, fresh feed oil is passed directly to the deactivated catalyst to obtain an extended life in the downstream catalyst.

REFERENCES:
patent: 2878179 (1959-03-01), Henning
patent: 3418234 (1968-12-01), Chervenak et al.
patent: 3519557 (1970-07-01), Pruiss
patent: 3607000 (1971-09-01), Beal et al.
patent: 3795607 (1974-03-01), Adams et al.
patent: 3850744 (1974-11-01), Plundo et al.

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