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US3886095A
Expired / Lapsed
US
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Catalyst for the reduction of automobile exhaust gases
Assignee: Olin Corp
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Filing: 1973-11-12
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Granted: 1975-05-27
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Expires: 1993-11-12
Abstract
Abstract A catalyst for the reduction of automobile pollution and a method for forming the same are described. The catalyst comprises a nickel alloy substrate having a specified composition and a surface layer containing from 10 to 50% copper. The surface layer may be applied by pressure welding or by electroplating.
Inventors
- 👤 James A Ford
- 👤 Sheldon H Butt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:52
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; B01J37/00; B01J37/02; B01J37/0215; B01J37/0225; B01J37/34; B01J37/348; C22C19/007; B01D2255/00; B01D2255/20; B01D2255/204; B01D2255/2047; B01D2255/207; B01D2255/2073; B01D2255/20753; B01D2255/20761; B01D2255/20784; B01D2255/209; B01D2255/2092; B01D2255/30
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
A COMPOSITE CATALYST FOR THE REDUCTION OF AUTOMOBILE EXHAUST POLLUTION COMPRISING: A. A NICKEL ALLOY SUBSTRATE CONTAINING FROM 2 TO 6% ALUMINUM, FROM 0.5 TO 4% SILICON, FROM 0.001 TO 6% CHROMIUM, FROM 0.001 TO 0.4% MANGANESE, FROM 0.001 TO 1% MAGNESIUM, BALANCE ESSENTIALLY NICKEL; AND B. A SURFACE LAYER F COPPER-NICKEL ALLOY ON SAID SUBSTRATE, HAVING A COMPOSITION CONSISTING ESSENTIALLY OF FROM 10 TO 50% COPPER AND FROM 50 TO 90% NICKEL, SAID SURFACE LAYER HAVING A THICKNESS OF FROM 100 A TO 0.05 INCHES.
Claim 2
Dependent Claim
86 words
A COMPOSITE CATALYST FOR THE REDUCTION OF AUTOMOBILE EXHAUST POLLUTION COMPRISING: A. A NICKEL ALLOY SUBSTRATE CONTAINING FROM 2 TO 6% ALUMINUM, FROM 0.5 TO 4% SILICON, FROM 0.001 TO 6% CHROMIUM, FROM 0.001 TO 0.4% MANGANESE, FROM 0.001 TO 1% MAGNESIUM, BALANCE ESSENTIALLY NICKEL; AND B. A SURFACE LAYER F COPPER-NICKEL ALLOY ON SAID SUBSTRATE, HAVING A COMPOSITION CONSISTING ESSENTIALLY OF FROM 10 TO 50% COPPER AND FROM 50 TO 90% NICKEL, SAID SURFACE LAYER HAVING A THICKNESS OF FROM 100 A TO 0.05 INCHES.
Claim 3
Dependent Claim
19 words
A catalyst as in claim 1 wherein the copper concentration in the surface layer is from 20 to 40%.
Claim 4
Dependent Claim
17 words
A catalyst as in claim 1 wherein the nickel alloy substrate contains from 3 to 5% aluminum.
Claim 5
Dependent Claim
17 words
A catalyst as in claim 1 wherein the nickel alloy substrate contains from 1.5 to 3.5% silicon.
Claim 6
Dependent Claim
17 words
A catalyst as in claim 1 wherein the nickel Alloy substrate contains from 2 to 5% chromium.
Claim 7
Independent Claim
85 words
A method for producing a composite catalyst comprising the steps of: A. providing a nickel alloy substrate, said alloy consisting of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 0.001 to 6% chromium, from 0.001 to 0.4% manganese, from 0.001 to 1% magnesium with the balance being essentially nickel; and B. applying a surface layer of copper-nickel alloy, containing from 10 to 50% copper, to the surface of the substrate, said layer having a thickness of from 100 A to 0.05 inches.
Claim 8
Independent Claim
85 words
A method for producing a composite catalyst comprising the steps of: A. providing a nickel alloy substrate, said alloy consisting of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 0.001 to 6% chromium, from 0.001 to 0.4% manganese, from 0.001 to 1% magnesium with the balance being essentially nickel; and B. applying a surface layer of copper-nickel alloy, containing from 10 to 50% copper, to the surface of the substrate, said layer having a thickness of from 100 A to 0.05 inches.
Claim 9
Dependent Claim
22 words
A method as in claim 1 wherein the copper concentration in the surface layer of the catalyst varies from 20 to 40%.
Claim 10
Dependent Claim
17 words
A method as in claim 6 wherein the nickel alloy substrate contains from 3 to 5% aluminum.
Claim 11
Dependent Claim
17 words
A method as in claim 6 wherein the nickel alloy substrate contains from 1.5 to 3.5% silicon.
Claim 12
Dependent Claim
17 words
A method as in claim 6 wherein the nickel alloy substrate contains from 2 to 5% chromium.
Claim 13
Dependent Claim
40 words
A method as in claim 6 including the steps of heating the heat treated substrate surface layer in an oxidizing atmosphere at a temperature of between 200* and 600*C for a time period of from 1 minute to 2 hours.
Claim 14
Dependent Claim
24 words
A method as in claim 6 including the step of forming the substrate into expanded mesh prior to applying the copper-nickel alloy surface layer.
Claim 15
Dependent Claim
79 words
A method as in claim 6 wherein the copper-nickel alloy surface layer is applied to the substrate by a pressure welding process which comprises: A. providing a substrate material having at least one clean major surface; B. providing a surface alloy material having at least one clean major surface; C. arranging the substrate layer and the substrate layer so that the clean major surfaces come into contact; and D. pressure bonding the substrate and the surface layer by rolling.
Claim 16
Dependent Claim
20 words
A method as in claim 6 wherein the copper-nickel alloy surface layer is applied to the substrate by plasma spraying.
Claim 17
Dependent Claim
16 words
A method as in claim 6 wherein the copper-nickel surface is applied by an electroplating process.
Claim 18
Dependent Claim
22 words
A catalyst as in claim 1 wherein the surface layer contains from 0.001 to 8% aluminum and from 0.001 to 6% silicon.
Claim 19
Dependent Claim
22 words
A catalyst as in claim 6 wherein the surface layer contains from 0.001 to 8% aluminum and from 0.001 to 6% silicon.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |