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US3966790A
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Compositions and methods for high temperature stable catalysts
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1973-12-10
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Granted: 1976-06-29
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Expires: 1993-12-10
Abstract
Abstract Catalysts having good high temperature stability which are particularly useful for selected high temperature reactions are disclosed as are methods for their preparation and use. The catalytically-active materials include platinum group metal deposited on a catalytic slip or composite which contains a mixture of alumina, selected VIB metal oxides, and a metallic oxide or oxide mixture wherein the metal or metals are selected IIA, IVA, and IIA-IVA mixtures, selected IIA and IVB mixtures and selected IVA and IVB mixtures. The slips or carrier compositions are calcined at a temperature of at least 500 DEG C. before deposition of platinum group metal and characterized by having a surface area of at least 20 m2g after calcination at a temperature of 1200 DEG C. for two hours.
Inventors
- 👤 Saul G. Hindin
- 👤 George R. Pond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:19
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/652
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
147 words
A catalyst composition consisting essentially of (a) a catalytically-active, calcined composite of alumina; a first metal oxide component selected from the group consisting of an oxide of chromium, tungsten, and mixtures thereof; and a second metal oxide component selected from the group consisting of an oxide of (i) a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof and (ii) mixtures of zirconium with a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof, said composite having been formed by calcination at a temperature of at least 500°C. and possessing a surface area of at least 20 m 2 / g when calcined for 2 hours at 1200°C.; and (b) a catalytically-effective amount of a platinum group metal incorporated in said calcined composite after calcination of said composite at a temperature of at least 500°C.
Claim 2
Dependent Claim
147 words
A catalyst composition consisting essentially of (a) a catalytically-active, calcined composite of alumina; a first metal oxide component selected from the group consisting of an oxide of chromium, tungsten, and mixtures thereof; and a second metal oxide component selected from the group consisting of an oxide of (i) a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof and (ii) mixtures of zirconium with a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof, said composite having been formed by calcination at a temperature of at least 500°C. and possessing a surface area of at least 20 m 2 / g when calcined for 2 hours at 1200°C.; and (b) a catalytically-effective amount of a platinum group metal incorporated in said calcined composite after calcination of said composite at a temperature of at least 500°C.
Claim 3
Dependent Claim
45 words
A composition as defined in claim 1 wherein said composite contains about 80 to 95 weight percent of said alumina, about 2 to 15 weight percent of said first metal oxide component and about 2 to 15 weight percent of said second metal oxide component.
Claim 4
Dependent Claim
68 words
A catalyst composition as defined in claim 1 wherein said composite contains about 80 to 95 weight percent of alumina, about 2 to 15 weight percent of said first metal oxide component and about 2 to 15 weight percent of said second metal oxide component, and wherein said first metal oxide component is chromia and wherein said second metal oxide component is a mixture of BaO and SnO.
Claim 5
Dependent Claim
43 words
A composition as defined in claim 1 wherein said platinum group metal is present in an amount of about 0.1 to 20 percent by weight of said composite and is selected from the group consisting of platinum, palladium, platinum-palladium alloys, and mixtures thereof.
Claim 6
Dependent Claim
12 words
A composition as defined in claim 1 wherein said composite is pellet-form.
Claim 7
Dependent Claim
172 words
A catalyst composition consisting essentially of (a) an inert support and deposited on said support (b) a catalytically-active calcined composite of alumina; a first metal oxide component selected from the group consisting of an oxide of chromium, tungsten and mixtures thereof; and a second metal oxide component selected from the group consisting of an oxide of (i) a metal selected from the group consisting of calcium, strontium, barium, silicon, tin and mixtures thereof and (ii) mixtures of zirconium with a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtues thereof, said composite having been formed by calcination at a temperature of at least 500°C. before being deposited on said support and possessing a surface area of at least 20 m 2 /g when calcined for 2 hours at 1200°C. and (c) a catalytically-effective amount of a platinum group metal incorporated in said composite after said composite has been calcined at a temperature of at least 500°C. and after said composite has been deposited on said inert support.
Claim 8
Dependent Claim
172 words
A catalyst composition consisting essentially of (a) an inert support and deposited on said support (b) a catalytically-active calcined composite of alumina; a first metal oxide component selected from the group consisting of an oxide of chromium, tungsten and mixtures thereof; and a second metal oxide component selected from the group consisting of an oxide of (i) a metal selected from the group consisting of calcium, strontium, barium, silicon, tin and mixtures thereof and (ii) mixtures of zirconium with a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtues thereof, said composite having been formed by calcination at a temperature of at least 500°C. before being deposited on said support and possessing a surface area of at least 20 m 2 /g when calcined for 2 hours at 1200°C. and (c) a catalytically-effective amount of a platinum group metal incorporated in said composite after said composite has been calcined at a temperature of at least 500°C. and after said composite has been deposited on said inert support.
Claim 9
Dependent Claim
13 words
A catalyst composition as defined in claim 6 wherein said support is pellet-form.
Claim 10
Dependent Claim
15 words
A catalyst composition as defined in claim 6 wherein said support is a ceramic honeycomb.
Claim 11
Dependent Claim
49 words
A catalyst composition as defined in claim 6 wherein said platinum group metal is present in an amount of about 0.2 to 10 percent by weight of said composite and wherein said platinum group metal is selected from the group consisting of platinum, palladium, platinum-palladium alloys, and mixtures thereof.
Claim 12
Dependent Claim
46 words
A catalyst composition as defined in claim 6 wherein said composite contains about 80 to 95 weight percent of said alumina, about 2 to 15 weight percent of said first metal oxide component, and about 2 to 15 weight percent of said second metal oxide component.
Claim 13
Dependent Claim
30 words
A catalyst composition as defined in claim 6 wherein said first metal oxide component is chromia and wherein said second metal oxide component is a mixture of BaO and SnO.
Claim 14
Independent Claim
175 words
A method for the preparation of a catalyst composition, comprising: (a) forming an intimate admixture consisting essentially of an alumina-producing aluminum compound, and of two metal compound components which upon calcining yield the corresponding metal oxides wherein the first of said metal compound components is selected from the group consisting of a compound of chromium, tungsten, and mixtures thereof and the second of said metal compound components is selected from the group consisting of a compound of (i) a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof and (ii) mixtures of zirconium with a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof; (b) calcining said intimate admixture at a temperature of at least 500°C to form a resulting calcined composite containing alumina and the aforesaid metal oxides, and possessing a surface area of at least 20 m 2 /g when calcined for two hours at 1200°C; and (c) incorporating a catalytically-effective amount of a platinum group metal in said calcined composite.
Claim 15
Independent Claim
175 words
A method for the preparation of a catalyst composition, comprising: (a) forming an intimate admixture consisting essentially of an alumina-producing aluminum compound, and of two metal compound components which upon calcining yield the corresponding metal oxides wherein the first of said metal compound components is selected from the group consisting of a compound of chromium, tungsten, and mixtures thereof and the second of said metal compound components is selected from the group consisting of a compound of (i) a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof and (ii) mixtures of zirconium with a metal selected from the group consisting of calcium, strontium, barium, silicon, tin, and mixtures thereof; (b) calcining said intimate admixture at a temperature of at least 500°C to form a resulting calcined composite containing alumina and the aforesaid metal oxides, and possessing a surface area of at least 20 m 2 /g when calcined for two hours at 1200°C; and (c) incorporating a catalytically-effective amount of a platinum group metal in said calcined composite.
Claim 16
Dependent Claim
13 words
A method as defined in claim 12 wherein said aluminum compound is alumina.
Claim 17
Dependent Claim
26 words
A method as defined in claim 12 further comprising depositing said composite on a relatively inert substrate to form a coating thereon prior to step (c).
Claim 18
Dependent Claim
17 words
A method as defined in claim 12 further comprising forming said intimate admixture into pellets before calcining.
Claim 19
Dependent Claim
25 words
A method as defined in claim 12 further comprising depositing said catalyst composition on a relatively inert substrate to form a coating after step (c).
Claim 20
Dependent Claim
34 words
A method as defined in claim 12 wherein the metal of said first metal compound component is chromium and the metal of said second metal compound component is a mixture of barium and tin.
Claim 21
Dependent Claim
23 words
A method as defined in claim 12 wherein said intimate admixture is formed by coprecipitation of said compounds from an aqueous solution thereof.
Claim 22
Dependent Claim
20 words
A catalyst composition in accordance with claim 1 wherein said composite is formed by calcining at a temperature of 1200°C.
Claim 23
Dependent Claim
18 words
A method in accordance with claim 12 wherein said intimate admixture is calcined at a temperature of 1200°C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |