Process and unit for regeneration of a catalyst for the producti

Details Process and unit for regeneration of a catalyst for the producti Process and unit for regeneration of a catalyst for the producti

1998-04-14

2000-04-11

Bos, Steven

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

502 38, 502 43, 502 45, 502 46, B01J 3800, B01J 3844

Patent

active

06048814&

ABSTRACT:
The invention concerns a process and unit for regenerating a catalyst for the production of aromatic compounds, in particular for reforming, the catalyst being in a moving bed, comprising combustion, oxychlorination and calcining steps, in which at least one chlorinating agent, at least one oxygen-containing gas, and water are introduced into the oxychlorination step such that the H.sub.2 O/HCl molar ratio is 1 to 50, the oxychlorination step being carried out in the presence of an oxychlorination gas containing less than 21% of oxygen and at least 50 ppm by weight of chlorine (based on HCl), and at a temperature of 350-600.degree. C., and in which the combustion step is carried out in at least two combustion zones, each zone being separated from the adjacent zones, and at least one gas charged with oxygen is introduced into each zone, the gases produced being extracted from each zone, and in which the severity of the operating conditions increases in the direction of flow of the catalyst.

REFERENCES:
patent: 4849092 (1989-07-01), Ham et al.
patent: 4872970 (1989-10-01), Boyle
patent: 5053371 (1991-10-01), Williamson

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