US4176088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superactive multimetallic catalytic composite comprising platinum group metal and rhenium
Assignee: Honeywell UOP LLC
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Filing: 1978-10-30
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Granted: 1979-11-27
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Expires: 1998-10-30
Abstract
Abstract A novel superactive multimetallic reduced catalytic composite especially useful in the conversion of hydrocarbons comprises a combination of a catalytically effective amount of an adsorbed rhenium oxide 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. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, adsorbed rhenium oxide 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 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 oxide reagent with a porous carrier material containing a uniform dispersion of a platinum group metal maintained in the elemental state, whereby the interaction of the rhenium oxide moiety with the platinum group metal moiety is maximized due to the platinophilic (i.e. platinum-seeking) propensities of the oxygen ligands used in the rhenium reagent.
Inventors
- 👤 George J. Antos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6567; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
A bimetallic catalytic composite comprising a reduced combination of a cataytic effective amount of rhenium and platinum prepared by adsorbing a rhenium compound comprising a rhenium oxide or a rhenium compound convertible to the oxide form on a porous carrier which has a uniform dispersal of said catalytically effective amount of platinum, wherein said platinum is maintained in the elemental metallic state, at least a portion of said rhenium compound is adsorbed on the surface of said elemental metallic platinum and wherein said rhenium compound is reduced in a substantially water-free atmosphere consisting essentially of a hydrogen-containing inert gas to the elemental metallic rhenium metal at reduction conditions during which said platinum group component is maintained in said elemental metallic state.
Claim 2
Dependent Claim
121 words
A bimetallic catalytic composite comprising a reduced combination of a cataytic effective amount of rhenium and platinum prepared by adsorbing a rhenium compound comprising a rhenium oxide or a rhenium compound convertible to the oxide form on a porous carrier which has a uniform dispersal of said catalytically effective amount of platinum, wherein said platinum is maintained in the elemental metallic state, at least a portion of said rhenium compound is adsorbed on the surface of said elemental metallic platinum and wherein said rhenium compound is reduced in a substantially water-free atmosphere consisting essentially of a hydrogen-containing inert gas to the elemental metallic rhenium metal at reduction conditions during which said platinum group component is maintained in said elemental metallic state.
Claim 3
Dependent Claim
23 words
A bimetallic catalytic composite as defined in claim 1 wherein the porous carrier material contains a catalytically effective amount of a halogen component.
Claim 4
Dependent Claim
16 words
A bimetallic catalytic composite as defined in claim 2 wherein the halogen component is combined chloride.
Claim 5
Dependent Claim
19 words
A bimetallic catalytic composite as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.
Claim 6
Dependent Claim
16 words
A bimetallic catalytic composite as defined in claim 4 wherein the refractory inorganic oxide is alumina.
Claim 7
Dependent Claim
31 words
A bimetallic catalytic composite as defined in claim 1 wherein said adsorbed rhenium oxide compound is derived from an aqueous solution of perrhenic acid or of a salt of perrhenic acid.
Claim 8
Dependent Claim
43 words
A bimetallic catalytic composite as defined in claim 1 wherein the composite contains the components in an amount, calculated on an elemental metallic basis, corresponding to about 0.01 to about 2 wt. % platinum and about 0.01 to about 5 wt. % rhenium.
Claim 9
Dependent Claim
38 words
A bimetallic catalytic composite as defined in claim 2 wherein the halogen component is present therein in an amount sufficient to result in the composite containing, on an elemental basis, about 0.1 to about 3.5 wt. % halogen.
Claim 10
Dependent Claim
90 words
A bimetallic catalytic composite as defined in claim 1 wherein the composite is prepared by the steps of: (a) reacting a rhenium oxide-containing solution with a porous carrier material containing a uniform dispersion of platinum maintained in the elemental metallic state; (b) subjecting the resulting reaction product to drying conditions selected to vaporize the solvent without agglomerating the platinum; and thereafter (c) treating the resulting dried reaction product with a dry hydrogen stream at reduction conditions selected to reduce substantially all of the rhenium component to the elemental metallic state.
Claim 11
Dependent Claim
35 words
A bimetallic catalytic composite as defined in claim 9 wherein the reduction conditions include a gas hourly space velocity sufficient to rapidly dissipate any local concentration of water formed from reduction of the rhenium compound.
Claim 12
Dependent Claim
28 words
A bimetallic cataytic composite as defined in claim 9 wherein the rhenium oxide-containing solution is an aqueous solution of perrhenic acid or of a salt of perrhenic acid.
Claim 13
Dependent Claim
133 words
A bimetallic catalytic composite comprising the dried and reduced reaction product formed by reacting a catalytically effective amount of a rhenium compound selected from the group consisting of rhenium oxide and a rhenium compound convertible to said rhenium oxide on a porous carrier material which has a uniform dispersion of a catalytically effective amount of platinum maintained in the elemental metallic state, wherein said reaction results in adsorbtion of at least a portion of said rhenium compound to said elemental metallic platinum and thereafter subjecting said reaction product to drying and reduction at drying and reduction conditions, which include a substantially water-free and hydrogen-containing inert gas atmosphere selected to reduce said rhenium compound to the elemental metallic state without agglomerating the platinum while maintaining said platinum group component in said elemental metallic state.
Claim 14
Dependent Claim
133 words
A bimetallic catalytic composite comprising the dried and reduced reaction product formed by reacting a catalytically effective amount of a rhenium compound selected from the group consisting of rhenium oxide and a rhenium compound convertible to said rhenium oxide on a porous carrier material which has a uniform dispersion of a catalytically effective amount of platinum maintained in the elemental metallic state, wherein said reaction results in adsorbtion of at least a portion of said rhenium compound to said elemental metallic platinum and thereafter subjecting said reaction product to drying and reduction at drying and reduction conditions, which include a substantially water-free and hydrogen-containing inert gas atmosphere selected to reduce said rhenium compound to the elemental metallic state without agglomerating the platinum while maintaining said platinum group component in said elemental metallic state.
Claim 15
Dependent Claim
23 words
A bimetallic catalytic composite as defined in claim 12 wherein the porous carrier material contains a catalytically effective amount of a halogen component.
Claim 16
Dependent Claim
16 words
A bimetallic catalytic composite as defined in claim 13 wherein the halogen component is combined chloride.
Claim 17
Dependent Claim
30 words
A bimetallic catalytic composite as defined in claim 12 wherein compound rhenium oxide component is derived from an aqueous solution of perrhenic acid or of a salt of perrhenic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |