Patent US4231897A successfully refreshed from Google Patents.
US4231897A
Expired / Lapsed
US
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Attenuated superactive multimetallic catalytic composite
Assignee: Honeywell UOP LLC
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Filing: 1979-05-04
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Granted: 1980-11-04
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Expires: 1999-05-04
Abstract
Abstract A novel 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 catalytically effective amounts of a platinum group component, which is maintained in the elemental metallic state during the incorporation of the rhenium carbonyl component, and of a cadmium 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, cadmium 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. % cadmium 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 cadmium component and of a platinum group metal 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.
Inventors
- 👤 George J. Antos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:17
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6567
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
48 words
A catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component, which is maintained in the elemental metallic state, and of a cadmium component.
Claim 2
Dependent Claim
48 words
A catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component, which is maintained in the elemental metallic state, and of a cadmium component.
Claim 3
Dependent Claim
15 words
A catalytic composite as defined in claim 1 wherein the platinum group component is platinum.
Claim 4
Dependent Claim
15 words
A catalytic composite as defined in claim 1 wherein the platinum group component is ruthenium.
Claim 5
Dependent Claim
15 words
A catalytic composite as defined in claim 1 wherein the platinum group component is rhodium.
Claim 6
Dependent Claim
15 words
A catalytic composite as defined in claim 1 wherein the platinum group component is iridium.
Claim 7
Dependent Claim
22 words
A catalytic composite as defined in claim 1 wherein the porous carrier material contains a catalytically effective amount of a halogen component.
Claim 8
Dependent Claim
15 words
A catalytic composite as defined in claim 6 wherein the halogen component is combined chlorine.
Claim 9
Dependent Claim
18 words
A catalytic composite as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.
Claim 10
Dependent Claim
15 words
A catalytic composite as defined in claim 8 wherein the refractory inorganic oxide is alumina.
Claim 11
Dependent Claim
52 words
A 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 group metal, about 0.01 to about 5 wt. % cadmium and about 0.01 to about 5 wt. % rhenium.
Claim 12
Dependent Claim
37 words
A catalytic composite as defined in claim 6 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 13
Dependent Claim
27 words
A catalytic composite as defined in claim 1 wherein substantially all of the cadmium component is present in an oxidation state above that of the elemental metal.
Claim 14
Dependent Claim
28 words
A catalytic composite as defined in claim 12 wherein substantially all of the cadmium component is present as cadmium oxide or cadmium aluminate or as a mixture thereof.
Claim 15
Dependent Claim
53 words
A catalytic composite as defined in claim 1 wherein the metals content thereof is adjusted so that the atomic ratio of cadmium to platinum group metal is about 0.1:1 to 5:1 and the atomic ratio of rhenium, derived from the rhenium carbonyl component, to platinum group metal is about 0.5:1 to about 10:1.
Claim 16
Dependent Claim
51 words
A catalytic composite as defined in claim 6 wherein the composite contains, on an elemental basis, about 0.05 to about 1 wt. % platinum group metal, about 0.05 to about 2 wt. % rhenium, about 0.01 to about 1 wt. % cadmium and about 0.5 to about 1.5 wt. % halogen.
Claim 17
Dependent Claim
70 words
A catalytic composite as defined in claim 1 wherein the composite is prepared by the steps of: (a) reacting a rhenium carbonyl complex with a porous carrier material containing a uniform dispersion of a platinum group component, maintained in the elemental metallic state, and of a cadmium component, and thereafter (b) subjecting the resulting reaction product to pyrolysis conditions selected to decompose substantially all of the resulting rhenium carbonyl component.
Claim 18
Dependent Claim
25 words
A catalytic composite as defined in claim 16 wherein the pyrolysis step is conducted under anhydrous conditions and in the substantial absence of free oxygen.
Claim 19
Dependent Claim
70 words
A catalytic composite comprising the pyrolyzed reaction product formed by reacting a catalytically effective amount of a rhenium carbonyl complex with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a cadmium component and of a platinum group component maintained in the elemental metallic state, and thereafter subjecting the resulting reaction product to pyrolysis conditions selected to decompose substantially all of the resulting rhenium carbonyl component.
Claim 20
Dependent Claim
70 words
A catalytic composite comprising the pyrolyzed reaction product formed by reacting a catalytically effective amount of a rhenium carbonyl complex with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a cadmium component and of a platinum group component maintained in the elemental metallic state, and thereafter subjecting the resulting reaction product to pyrolysis conditions selected to decompose substantially all of the resulting rhenium carbonyl component.
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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |