Selectively sulfided acidic multimetallic catalytic composite

Details Selectively sulfided acidic multimetallic catalytic composite Selectively sulfided acidic multimetallic catalytic composite

1978-01-25

1979-12-11

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252441, 208139, 252466PT, B01J 2704

Patent

active

041782682

ABSTRACT:
Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a selective sulfided acidic multimetallic catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a sulfided rhenium component and a halogen component with a porous carrier material formed from Ziegler alumina. The platinum group component, sulfided rhenium component and halogen component are present in the multimetallic catalytic composite in an amount, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 2 wt. % rhenium, about 0.1 to about 3.5 wt. % halogen and sulfur in an amount at least sufficient to provide an atomic ratio of sulfur to rhenium of at least about 0.5:1. These metallic components are, moreover, relatively uniformly dispersed throughout the Ziegler alumina carrier material in carefully controlled oxidation state such that substantially all of the platinum group metal is present therein in the elemental metallic state and a substantial portion of the rhenium present therein is maintained in a sulfided state. A key feature of the hydrocarbon conversion process using the subject catalyst involves the continuous maintenance of the sulfided state of the rhenium component for the duration of the hydrocarbon conversion process.

REFERENCES:
patent: 3415737 (1968-12-01), Kluksdahl
patent: 3617520 (1971-11-01), Kluksdahl
patent: 3852190 (1974-12-01), Buss et al.
patent: 4012313 (1977-03-01), Buss et al.
patent: 4032475 (1977-06-01), Knapik et al.

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