Process for preparing noble metal-containing zeolites

Details Process for preparing noble metal-containing zeolites Process for preparing noble metal-containing zeolites

1987-09-02

1989-11-21

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 74, B01J 2912, B01J 2932

Patent

active

048823074

ABSTRACT:
A process for preparing noble metal-containing zeolites having high noble metal dispersion comprises (a) contacting a zeolite material with a cationic noble metal complex; (b) calcining the resulting meterial in the presence of molecular oxygen at about 300.degree. to 375.degree. C. for a time sufficient to cause decomposition of said complex; (c) purging oxygen and water from the calcined material in an inert atmosphere at 200.degree. to 350.degree. C.; and (d) reducing the purged material with hydrogen at 200.degree. to 350.degree. C. for a time sufficient to reduce the cationic noble metal to highly dispersed free metal.

REFERENCES:
patent: 3226339 (1965-12-01), Frilette et al.
patent: 3783123 (1974-01-01), Young
patent: 4539305 (1985-09-01), Wilson et al.
patent: 4683052 (1987-07-01), Degnan, Jr. et al.
patent: 4683274 (1987-07-01), Nakamura et al.
patent: 4717700 (1988-01-01), Venkatram et al.

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