US4152299A
Expired / Lapsed
US
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Ruthenium catalyst system and method of stabilizing a ruthenium catalyst system
Assignee: Ford Motor Co
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Filing: 1978-04-10
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Granted: 1979-05-01
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Expires: 1998-04-10
Abstract
Abstract Under oxidizing conditions, a ruthenium catalyst system which is not protected will lose ruthenium by volatilization. A method is taught in this specification for stabilizing a ruthenium catalyst system against such volatilization under oxidizing conditions. The method is carried out by applying to a catalyst substrate a ruthenium catalyst system in which the catalytic material under oxidizing conditions is of the type La +3 Ni x +3 Ru 1-x +3 O 3 wherein x is in the range from 0.1 to 0.9.
Inventors
- 👤 Haren S. Gandhi
- 👤 Mordecai Shelef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:09
CPC Classifications
B; B01; B01J; B01J33/00; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/462; B01J23/70; B01J23/89; B01J23/8933; B01J23/894; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1026; B01D2255/20; B01D2255/206; B01D2255/2063; B01D2255/207; B01D2255/20753; B01D2255/40; B01D2255/402; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A method of forming a ruthenium catalyst system which can provide ruthenium in its elemental state when exposed to a reducing environment and provide ruthenium in a stabilized state when exposed to oxidizing conditions, which method comprises: obtaining a catalyst substrate; applying to said catalyst substrate a refractory oxide material which acts as a surface area extending material; preparing a perovskite compound of the formulation La +3 Ni x +3 Ru 1-x +3 O 3 wherein x is in a range from 0.1 to 0.9; grinding said perovskite into a finely divided state; forming a slurry with said finely divided perovskite compound; applying said slurry to said refractory oxide coated substrate; and calcining said substrate so that perovskite compound adheres thereto.
Claim 2
Independent Claim
121 words
A method of forming a ruthenium catalyst system which can provide ruthenium in its elemental state when exposed to a reducing environment and provide ruthenium in a stabilized state when exposed to oxidizing conditions, which method comprises: obtaining a catalyst substrate; applying to said catalyst substrate a refractory oxide material which acts as a surface area extending material; preparing a perovskite compound of the formulation La +3 Ni x +3 Ru 1-x +3 O 3 wherein x is in a range from 0.1 to 0.9; grinding said perovskite into a finely divided state; forming a slurry with said finely divided perovskite compound; applying said slurry to said refractory oxide coated substrate; and calcining said substrate so that perovskite compound adheres thereto.
Claim 3
Dependent Claim
9 words
The method of claim 1 wherein: x is 0.5.
Claim 4
Dependent Claim
63 words
A catalyst system consisting of: a substrate; a refractory oxide material coated on said substrate in which said refractory oxide material acts as a surface area extending material on said substrate; a perovskite compound of the structure La +3 Ni x +3 Ru 1-x +3 O 3 on said refractory oxide coated substrate wherein x is in a range from 0.1 to 0.9.
Claim 5
Dependent Claim
63 words
A catalyst system consisting of: a substrate; a refractory oxide material coated on said substrate in which said refractory oxide material acts as a surface area extending material on said substrate; a perovskite compound of the structure La +3 Ni x +3 Ru 1-x +3 O 3 on said refractory oxide coated substrate wherein x is in a range from 0.1 to 0.9.
Claim 6
Dependent Claim
12 words
The catalyst system as defined in claim 3 wherein: x is 0.5.
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) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |