Activation of platinum containing reforming catalysts
AssigneeEngelhard Corporation
InventorSoni O. Oyekan
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Abstract
A metal catalyst preferably comprised of a platinum/rhenium metal combination, supported on alumina is activated for the reforming of hydrocarbon feedstock, by being contacted with an oxygen-containing gas at a temperature sufficient to oxidize the metal catalyst and then being reduced sequentially by contacting the catalyst with a stream of hydrogen at about 650.degree. to about 750.degree. F. for a first period of time and then at about 900.degree. to about 1000.degree. F. for a second period of time, followed by sulfiding of the sequentially reduced catalyst. The sequential reduction procedure increases the selectivity of the reforming catalyst and results in increased C.sub.5.sup.+ liquid product yields.
Claims10
A process for activating a metal catalyst, comprised of platinum and rhenium supported on a porous solid carrier, for reforming a hydrocarbon feedstock by contact of the feedstock with the activated catalyst at reforming conditions, the steps of activation comprising:
- (a) contacting the catalyst with an oxygen-containing gas at a temperature sufficient to oxidize the metal catalyst;
- (b) reducing the oxidized catalyst, sequentially, by first contacting the catalyst with a hydrogen containing gas at about 650.degree. to about 750.degree. F. for a first period of time, raising the temperature to about 900.degree. to about 1000.degree. F. and continuing the reduction in hydrogen for a second period of time;
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- (c) sulfiding the reduced catalyst.
Dependencies are inferred from the claim text.