Patent US4006103A successfully refreshed from Google Patents.
US4006103A
Expired / Lapsed
US
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Catalyst for treating exhaust gas from internal combustion engine
Assignee: BP Corp North America Inc
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Filing: 1975-11-03
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Granted: 1977-02-01
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Expires: 1995-11-03
Abstract
Abstract The catalyst comprises a nickel component, a rhodium component, and a monolithic ceramic support. It may also contain a platinum component and/or a palladium component and the monolithic ceramic support may be coated with a wash coat of a ceramic material having a relatively high surface area. The nickel component and the rhodium component are deposited upon the monolithic ceramic support sequentially and in that order.
Inventors
- 👤 Garbis H. Meguerian
- 👤 Eugene H. Hirschberg
- 👤 Frederick W. Rakowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:59
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9459; B01D53/9463; B01D53/9472; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; B01D53/944; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/892; C; C01; C01B; C01B21/00; C01B21/02; B01D2251/00; B01D2251/10; B01D2251/102; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1025; B01D2255/20; B01D2255/207; B01D2255/20753; B01J35/00; B01J35/50; B01J35/56; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
191 words
A catalyst for the reduction of nitrogen oxides in the exhaust gas from an internal combustion engine, which catalyst comprises a nickel component, a rhodium component, and a monolithic ceramic support for said nickel component and said rhodium component, said nickel component being present in an amount ranging from 2.5 to 12 wt.%, expressed as the metal and based on total catalyst weight, and comprising at least 75 wt.% of the total active metals present, and said rhodium component being present in an amount ranging from 0.01 to 0.08 wt.%, expressed as the metal and based on total catalyst weight, said catalyst being prepared by sequentially applying in the order specified hereinbelow to said monolithic ceramic support first a solution containing a dissolved salt of nickel and second a solution containing a dissolved salt of rhodium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500°]F.
Claim 2
Dependent Claim
191 words
A catalyst for the reduction of nitrogen oxides in the exhaust gas from an internal combustion engine, which catalyst comprises a nickel component, a rhodium component, and a monolithic ceramic support for said nickel component and said rhodium component, said nickel component being present in an amount ranging from 2.5 to 12 wt.%, expressed as the metal and based on total catalyst weight, and comprising at least 75 wt.% of the total active metals present, and said rhodium component being present in an amount ranging from 0.01 to 0.08 wt.%, expressed as the metal and based on total catalyst weight, said catalyst being prepared by sequentially applying in the order specified hereinbelow to said monolithic ceramic support first a solution containing a dissolved salt of nickel and second a solution containing a dissolved salt of rhodium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500°]F.
Claim 3
Dependent Claim
22 words
The catalyst of claim 1 wherein the surface area of said monolithic ceramic support is at least 10 square meters per gram.
Claim 4
Dependent Claim
23 words
The catalyst of claim 1 wherein said monolithic ceramic support comprises alumina, aluminum silicate, lithium aluminum silicate, magnesium aluminum silicate, or silicon nitride.
Claim 5
Dependent Claim
64 words
The catalyst of claim 1 wherein, prior to deposition of said nickel component and said rhodium component, said monolithic ceramic support is coated with a wash coat of a ceramic material having a relatively high surface area, said wash coat having a surface area that will provide the coated ceramic support with a surface area that is at least 10 square meters per gram.
Claim 6
Dependent Claim
157 words
The catalyst of claim 1 wherein said catalyst also comprises a platinum component, or a palladium component, or a mixture thereof, said platinum component and/or said palladium component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 7
Dependent Claim
23 words
The catalyst of claim 2 wherein said monolithic ceramic support comprises alumina, aluminum silicate, lithium aluminum silicate, magnesium aluminum silicate, or silicon nitride.
Claim 8
Dependent Claim
64 words
The catalyst of claim 3 wherein, prior to deposition of said nickel component and said rhodium component, said monolithic ceramic support is coated with a wash coat of a ceramic material having a relatively high surface area, said wash coat having a surface area that will provide the coated ceramic support with a surface area that is at least 10 square meters per gram.
Claim 9
Dependent Claim
157 words
The catalyst of claim 3 wherein said catalyst also comprises a platinum component, or palladium component, or a mixture thereof, said platinum component and/or said palladium component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 10
Dependent Claim
152 words
The catalyst of 4 wherein said catalyst also comprises a platinum component, or a palladium component, or a mixture thereof, said platinum component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of the solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 11
Dependent Claim
152 words
The catalyst of 4 wherein said catalyst also comprises a platinum component, or a palladium component, or a mixture thereof, said platinum component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of the solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 12
Dependent Claim
64 words
The catalyst of claim 6 wherein, prior to deposition of said nickel component and said rhodium component, said monolithic ceramic support is coated with a wash coat of a ceramic material having a relatively high surface area, said wash coat having a surface area that will provide the coated ceramic support with a surface area that is at least 10 square meters per gram.
Claim 13
Dependent Claim
157 words
The catalyst of claim 6 wherein said catalyst also comprises a platinum component, or a palladium component, or a mixture thereof, said platinum component and/or said palladium component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 14
Dependent Claim
157 words
The catalyst of claim 7 wherein said catalyst also comprises a platinum component, or a palladium component, or a mixture thereof, said platinum component and/or said palladium component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 15
Dependent Claim
157 words
The catalyst of claim 10 wherein said catalyst also comprises a platium component, or a palladium component, or a mixture thereof, said platinum component and/or said palladium component being present in an amount of 0.02 to 0.15 wt.%, expressed as the metal and based on total catalyst weight, the deposition of said platinum component and/or said palladium component being performed subsequent to that of the nickel component and prior to that of the rhodium component and comprising applying to said monolithic ceramic support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on the support the salt of that solution and the calcination of the support with the salt of that solution thereon, said calcination being conducted in air at a temperature of about 1,000° to 1,500° F.
Claim 16
Independent Claim
158 words
A method for preparing a catalyst comprising a nickel component, a rhodium component, and a monolithic ceramic support, which method comprises the following steps in the specified sequence: (1) applying to said support a first solution, said first solution containing a dissolved salt of nickel; (2) removing the diluent of said first solution from said support by drying to deposit on said support the salt of said first solution; (3) calcining said support with the salt of said first solution thereon in air at a temperature of about 1,000° to 1,500° F. ; (4) applying to said support a second solution, said second solution containing a dissolved salt of rhodium; (5) removing the diluent of said second solution from said support by drying to deposit on said support the salt of said second solution; and (6) calcining said support with the salt of said second solution thereon in air at a temperature of about 1,000° to 1,500° F.
Claim 17
Independent Claim
158 words
A method for preparing a catalyst comprising a nickel component, a rhodium component, and a monolithic ceramic support, which method comprises the following steps in the specified sequence: (1) applying to said support a first solution, said first solution containing a dissolved salt of nickel; (2) removing the diluent of said first solution from said support by drying to deposit on said support the salt of said first solution; (3) calcining said support with the salt of said first solution thereon in air at a temperature of about 1,000° to 1,500° F. ; (4) applying to said support a second solution, said second solution containing a dissolved salt of rhodium; (5) removing the diluent of said second solution from said support by drying to deposit on said support the salt of said second solution; and (6) calcining said support with the salt of said second solution thereon in air at a temperature of about 1,000° to 1,500° F.
Claim 18
Dependent Claim
62 words
The method of claim 14, which method comprises further coating said support with a wash coat of a ceramic material having a relatively high surface area prior to applying said first solution to said support, said wash coat having a surface area that will provide the coated ceraic support with a surface area that is at least 10 square meters per gram.
Claim 19
Dependent Claim
106 words
The method of claim 14, which method further comprises applying to said support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on said support the salt of that solution and the calcination of said support with the salt of that solution thereon at a temperature of about 1,000° to 1,500° F. and the appliction of each solution being made subsequent to the deposition of the nickel component and prior to the deposition of the rhodium component.
Claim 20
Dependent Claim
106 words
The method of claim 15, which method further comprises applying to said support a solution containing a dissolved salt of platinum and/or applying a solution containing a dissolved salt of palladium, the application of each solution being followed by the removal of the diluent of that solution by drying to deposit on said support the salt of that solution and the calcination of said support with the salt of that solution thereon at a temperature of about 1,000° to 1,500° F. and the application of each solution being made subsequent to the deposition of the nickel component and prior to the deposition of the rhodium component.
References Cited (Backward Citations)
US3886260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |