Hydrodesulfurization apparatus with upstaged reactor zones

Details Hydrodesulfurization apparatus with upstaged reactor zones Hydrodesulfurization apparatus with upstaged reactor zones

1976-08-17

1977-08-30

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

23283, 23284, B01J 804, B01J 100

Patent

active

040451828

ABSTRACT:
A process and apparatus 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: 2635707 (1953-04-01), Gilmore
patent: 3142545 (1964-07-01), Raaup et al.
patent: 3392002 (1968-07-01), Hamilton, Jr. et al.

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