Process for regenerating a catalyst for the production of aromat

Details Process for regenerating a catalyst for the production of aromat Process for regenerating a catalyst for the production of aromat

1990-01-12

1991-07-23

Konopka, Paul E.

Mineral oils: processes and products

Products and compositions

422216, 422223, 502 37, B01J 2396, B01J 3844, C10G 35085

Patent

active

050341170

ABSTRACT:
The invention concerns a regeneration process and the corresponding apparatus for regeneration of a reforming catalyst, the reforming operation being carried out in at least two reactors in series, through which the catalyst and the charge successively flow, the pressure in the first reactor through which the catalyst and the charge pass being under a pressure of between 3 and 8 bars.
The regeneration process is characterized in that the exhausted catalyst successively meets a first radial moving bed combustion zone 101, a second radial moving bed combustion zone 105, an axial oxychlorination moving bed zone 107 and an axial calcination moving bed zone 116, and that in the combustion zones the catalyst is treated under a pressure substantially equal to that which obtains in said first reactor, the burning gases are discharged from the second burning zone and are passed to a washing loop after having been previously mixed with the gases withdrawn from the oxychlorination zone and the calcination zone, that in the oxychlorination zone the catalyst is treated in co-flow relationship by a mixture of a gas from the calcination zone and a gas based on a chlorinated compound, and that in the calcination zone the catalyst is treated in counter-flow relationship by at least a part of the gases from the washing loop.

REFERENCES:
patent: 3647680 (1972-03-01), Greenwood et al.
patent: 3935244 (1976-01-01), Hayes
patent: 4133743 (1979-01-01), Boret et al.
patent: 4172027 (1979-10-01), Ham et al.
patent: 4218338 (1980-08-01), Huin et al.
patent: 4578370 (1986-03-01), Greenwood
patent: 4849092 (1989-07-01), Ham et al.

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