Production of rhenium-containing reforming catalysts

Details Production of rhenium-containing reforming catalysts Production of rhenium-containing reforming catalysts

1981-04-10

1983-01-18

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

B01J 2702

Patent

active

043691293

ABSTRACT:
A rhenium-containing catalyst, particularly one comprising platinum and rhenium, composited with a porous inorganic support material, especially alumina, is found to be more selective in hydrocarbon conversion reactions, particularly reforming (hydroforming) when pretreated in a sequence which includes the steps of oxidation, dry hydrogen reduction, and sulfiding. In all embodiments, the hydrogen reduction step is conducted at conditions sufficient to remove product water from the catalyst as it is produced until the catalyst becomes dry, or desiccated, and to continue such treatment until the amount of water contained in the exit gas is less than about 1000 ppm, preferably less than about 500 ppm. In a preferred embodiment, the catalyst is desiccated by an initial high temperature oxidation treat to activate the porous inorganic oxide base, or alumina, and then the hydrogen reduction step is performed at a lower temperature than that employed to effect the oxidation.

REFERENCES:
patent: 2939847 (1960-06-01), Smith et al.
patent: 3415737 (1968-12-01), Kluhsdahl
patent: 3449078 (1969-06-01), Quilk et al.
patent: 3660271 (1972-05-01), Keith
patent: 3843560 (1974-10-01), Hayes
patent: 4178268 (1979-12-01), Antos et al.

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