Process for regeneration of a catalyst that contains an...

Details Process for regeneration of a catalyst that contains an... Process for regeneration of a catalyst that contains an...

2008-07-29

2008-07-29

Wood, Elizabeth D. (Department: 1793)

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

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

C502S035000, C502S037000, C502S038000, C502S043000, C502S049000, C502S050000, C502S053000, C502S054000

Reexamination Certificate

active

07405174

ABSTRACT:
A process for regeneration of a catalyst that comprises at least one EUO-structural-type zeolite in acid form and at least one hydro-dehydrogenating metal, used in a process for isomerization of a hydrocarbon feedstock that comprises aromatic compounds with eight carbon atoms, comprising at least a) a stage for eliminating a majority of the coke, deposited on said catalyst, by combustion in the presence of a gas that contains oxygen at a temperature that is less than or equal to 600° C., and b) a stage for oxychlorination of the product that is obtained from stage a), carried out between 200 and 550° C. in the presence of at least one gas mixture that contains at least oxygen, water and chlorine and/or at least one chlorinated compound, is described.

REFERENCES:
patent: 4148749 (1979-04-01), Ab der Halden et al.
patent: 4835139 (1989-05-01), Tice et al.
patent: 5106798 (1992-04-01), Fung
patent: 6057486 (2000-05-01), Merlen et al.
patent: 6133183 (2000-10-01), Capelle et al.
patent: 6313363 (2001-11-01), Joly et al.
patent: 2002/0045544 (2002-04-01), Le Peltier et al.
patent: 58164527 (1983-09-01), None
Patent Abstracts of Japan vol. 007, No. 285 (C-201), Dec. 20, 1983.

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