Hydrodesulfurization process with upstaged reactor zones

Details Hydrodesulfurization process with upstaged reactor zones Hydrodesulfurization process with upstaged reactor zones

1975-11-17

1977-04-12

Crasanakis, George

Mineral oils: processes and products

Refining

Sulfur removal

C10G 2302

Patent

active

040173828

ABSTRACT:
A process for the hydrodesulfurization of residual oil in a plurality of catalyst zones in series with the upstream reactor being removed periodically for a catalyst change. When an upstream zone is taken off-stream for a catalyst change, the fresh feed oil is passed to a succeeding downstream zone so that the downstream catalyst zone is upstaged to the status of an upstream catalyst zone. When a zone is returned to service after a catalyst change, it enters the process as a downstream reactor in the series.

REFERENCES:
patent: 2906784 (1959-09-01), Dean et al.
patent: 3591489 (1971-07-01), Adams et al.
patent: 3598535 (1971-08-01), Wennerberg
patent: 3795607 (1974-03-01), Adams et al.
patent: 3809644 (1974-05-01), Johnson et al.

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