Attenuated superactive multimetallic catalytic composite

Details Attenuated superactive multimetallic catalytic composite Attenuated superactive multimetallic catalytic composite

1979-06-15

1980-10-21

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252443, 252466PT, 252474, B01J 2708, B01J 2710, B01J 2366

Patent

active

042293197

ABSTRACT:
An attenuated superactive multimetallic catalytic composite especially useful for converting hydrocarbons comprises a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of a catalytically effective amount of a platinum group component, which is maintained in the elemental metallic state, and of a silver component. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, pyrolyzed rhenium carbonyl component, silver component and optional halogen component are preferably present in the multimetallic catalytic composite in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, about 0.01 to about 5 wt. % silver and about 0.1 to about 3.5 wt. % halogen. A key feature associated with the preparation of the subject catalytic composite is reaction of a rhenium carbonyl complex with a porous carrier material containing a uniform dispersion of a silver component and of a platinum group component maintained in the elemental state, whereby the interaction of the rhenium moiety with the platinum group moiety is maximized due to the platinophilic (i.e. platinum-seeking) propensities of the carbon monoxide ligands associated with the rhenium reagent.

REFERENCES:
patent: 3933622 (1976-01-01), Mitchell et al.
patent: 4157989 (1979-06-01), Antos

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