Polymetallic cluster compositions useful as hydrocarbon conversi

Details Polymetallic cluster compositions useful as hydrocarbon conversi Polymetallic cluster compositions useful as hydrocarbon conversi

1974-07-30

1976-04-27

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252439, 252441, 252474, 208138, 208139, B01J 2104, B01J 2342, B01J 2346

Patent

active

039533689

ABSTRACT:
Compositions comprising iridium and at least one additional metal, preferably platinum, are disclosed in which the iridium and the additional metal or metals are present on a refractory support as highly dispersed polymetallic clusters. The metallic atoms in a cluster are separated by distances of about 2.5 to 4.0A. The degree of coverage of the surface of said refractory support by said polymetallic clusters is lower than about 10% and frequently lower than about 1%. The compositions are useful as hydrocarbon conversion catalysts, and iridiumplatinum catalysts containing a halogen moiety are especially useful for promoting naphtha reforming reactions.

REFERENCES:
patent: 2848377 (1958-08-01), Webb
patent: 2911357 (1959-11-01), Myers et al.

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