US4295818A
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Catalytic monolith and method of its formulation
Assignee: United States, US ENVIRONMENTAL PROTECTION AGENCY THE, Administrator of
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Filing: 1980-05-27
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Granted: 1981-10-20
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Expires: 2000-05-27
Abstract
Abstract A catalyst system in which the catalytic composition comprises a catalytically active material which is homogeneously interspersed throughout a monolith structure of ceramic composition. The composition is shaped into a unitary monolith which is employed as the catalyst structure. In the method the active material or materials are admixed with a ceramic material, which can be either active or inactive, in finely divided form and then shaped into the monolith structure.
Inventors
- 👤 Meredith J. Angwin
- 👤 William C. Pfefferle
- 👤 John P. Kesselring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:47
CPC Classifications
F; F23; F23C; F23C13/00; B; B01; B01J; B01J37/00; B01J37/0009; B01J37/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
A monolithic catalytic structure formed by the steps of homogeneously interspersing throughout a carrier structure of ceramic composition a base metal oxide which upon calcination becomes catalytically active, forming the ceramic composition interspersed with the oxide into the shape of a monolithic structure, and calcining the shaped structure with the interspersed metal oxide at a temperature of at least about 1,000° C.
Claim 2
Dependent Claim
62 words
A monolithic catalytic structure formed by the steps of homogeneously interspersing throughout a carrier structure of ceramic composition a base metal oxide which upon calcination becomes catalytically active, forming the ceramic composition interspersed with the oxide into the shape of a monolithic structure, and calcining the shaped structure with the interspersed metal oxide at a temperature of at least about 1,000° C.
Claim 3
Dependent Claim
32 words
A catalytic structure as in claim 1 in which the metal of the active base metal oxide is selected from the group consisting of Ni, Ce, Cr, Zr, Fe, Co and La.
Claim 4
Dependent Claim
21 words
A catalytic structure as in claim 1 comprising an additional catalytically active base metal oxide homogeneously interspersed throughout the carrier structure.
Claim 5
Dependent Claim
73 words
A monolithic catalytic structure comprising a catalytically active base metal oxide homogeneously interspersed throughout a carrier structure of ceramic composition, with the metal of the active base metal oxide selected from the group consisting of Ni, Ce, Cr, Zr, Fe, Co and La, and the ceramic of the carrier is selected from the group consisting of a mixed metal oxide of spinel crystal structure or a mixed metal oxide of corundum crystal structure.
Claim 6
Dependent Claim
73 words
A monolithic catalytic structure comprising a catalytically active base metal oxide homogeneously interspersed throughout a carrier structure of ceramic composition, with the metal of the active base metal oxide selected from the group consisting of Ni, Ce, Cr, Zr, Fe, Co and La, and the ceramic of the carrier is selected from the group consisting of a mixed metal oxide of spinel crystal structure or a mixed metal oxide of corundum crystal structure.
Claim 7
Independent Claim
89 words
A method of formulating a catalyst system comprising the steps of preparing a base metal oxide which upon calcination becomes catalytically active, said metal oxide having an average particle size on the order of 10-20 microns, interspersing the oxide particles throughout particles of a carrier structure of ceramic composition, forming the ceramic composition interspersed with the oxide into the shape of a monolith structure, and calcining the shaped structure at a temperature of at least 1,000° C. to form an homogeneous interspersion of the metal oxide in the ceramic.
Claim 8
Independent Claim
89 words
A method of formulating a catalyst system comprising the steps of preparing a base metal oxide which upon calcination becomes catalytically active, said metal oxide having an average particle size on the order of 10-20 microns, interspersing the oxide particles throughout particles of a carrier structure of ceramic composition, forming the ceramic composition interspersed with the oxide into the shape of a monolith structure, and calcining the shaped structure at a temperature of at least 1,000° C. to form an homogeneous interspersion of the metal oxide in the ceramic.
Claim 9
Dependent Claim
32 words
A combustion process comprising combusting reactants in the presence of a monolithic catalytic structure comprising a catalytically active base metal oxide homogeneously interspersed throughout a carrier structure of structurally sound ceramic composition.
Claim 10
Dependent Claim
32 words
A combustion process comprising combusting reactants in the presence of a monolithic catalytic structure comprising a catalytically active base metal oxide homogeneously interspersed throughout a carrier structure of structurally sound ceramic composition.
Claim 11
Dependent Claim
32 words
A combustion process as in claim 6 in which the metal of the active base metal oxide is selected from the group consisting of Ni, Ce, Cr, Zr, Fe, Co and La.
Claim 12
Dependent Claim
21 words
A combustion process as in claim 6 comprising an additional catalytically active base metal oxide homogeneously interspersed throughout the carrier structure.
Claim 13
Dependent Claim
85 words
A combustion process comprising combusting reactants in the presence of a monolithic catalytic structure comprising a catalytically active base metal oxide homogeneously interspersed throughout a carrier structure of ceramic composition, in which the metal of the active base metal oxide is selected from the group consisting of Ni, Ce, Cr, Zr, Fe, Co and La, and the ceramic of the carrier is selected from the group consisting of a mixed metal oxide of spinel crystal structure and a mixed metal oxide of corundum crystal structure.
Claim 14
Dependent Claim
85 words
A combustion process comprising combusting reactants in the presence of a monolithic catalytic structure comprising a catalytically active base metal oxide homogeneously interspersed throughout a carrier structure of ceramic composition, in which the metal of the active base metal oxide is selected from the group consisting of Ni, Ce, Cr, Zr, Fe, Co and La, and the ceramic of the carrier is selected from the group consisting of a mixed metal oxide of spinel crystal structure and a mixed metal oxide of corundum crystal structure.
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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |