Method of regenerating deactivated catalysts

Details Method of regenerating deactivated catalysts Method of regenerating deactivated catalysts

1995-06-06

1999-02-02

Caldarola, Glenn A.

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

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

502 35, B01J 3842, B01J 3844

Patent

active

058664955

ABSTRACT:
A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with oxygen and water at elevated temperatures, contacting the catalyst at elevated temperatures with a source of chlorine such as HCl or Cl.sub.2, and preferably oxygen and water, contacting the catalyst at elevated temperatures with oxygen and optionally water, and contacting the catalyst at elevated temperatures with hydrogen and optionally water to reduce the catalyst. Preferably the noble metal is platinum.

REFERENCES:
patent: 3773686 (1973-11-01), Hayes
patent: 3937660 (1976-02-01), Yates et al.
patent: 3943052 (1976-03-01), Kmak et al.
patent: 4192771 (1980-03-01), Burbidge et al.
patent: 4218338 (1980-08-01), Huin et al.
patent: 4444897 (1984-04-01), Fung et al.

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