US3865923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst
Assignee: Ethyl Corp
•
Filing: 1973-03-19
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Granted: 1975-02-11
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Expires: 1993-03-19
Abstract
Abstract Disclosed herein is an exhaust gas catalyst consisting essentially of a first metal selected from copper, nickel and cobalt, a rare earth metal, and a third metal selected from manganese, vanadium, iron and chromium, all in an oxide form and on a suitable catalyst support. The preferred catalysts contain copper, lanthanum and manganese in an atom ratio of about 1:2:3. The catalysts are resistant to lead.
Inventors
- 👤 Ruth E Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:46
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/34; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A METHOD OF LOWERING THE HYDROCARBON AND CARBON MONOXIDE CONTENT OF ENGINE EXHAUST GAS UNDER OXIDIZING CONDITIONS AND THE NITROGEN CONTENT OF ENGINE EXHAUST GAS UNDER REDUCING CONDITIONS COMPRISING CONTACTING SAID EXHAUST GAS UNDER SAID OXIDIZING OR REDUCING CONDITIONS AT ENGINE EXHAUST TEMPERATURE WITH AN EXHAUST GAS CATALYST CONSISTING ESSENTIALLY OF A UNIFORM METAL OXIDE COMPOSITION DEPOSITED ON A CATALYST SUPPORT, SAID METALOXIDE COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 0.1-10 WEIGHT PER CENT OF A FIRST METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, NICKEL AND COBALT, 1-20 WEIGHT PER CENT OF A RARE EARTH METAL, AND 0.1-20 WEIGHT PER CENT OF MANGANESE, IN AN OXIDE FROM, SAID PERCENTAGES BASED UPON THE TOTAL CATALYST WEIGHT, THE BALANCE OF SAID CATALYST CONSISTING OF SAID CATALYST SUPPORT, THE ATOM RATIO OF THE SUN OF SAID FIRST METAL AND SAID RARE EARTH METAL TO MANGANESE BEING 1-3:1, SAID METAL OXIDE DEPOSIT HAVING A PEROVSKITE TYPE CRYSTAL STRUCTURE AS SHOWN BY X-RAY DIFFRACTION.
Claim 2
Independent Claim
158 words
A METHOD OF LOWERING THE HYDROCARBON AND CARBON MONOXIDE CONTENT OF ENGINE EXHAUST GAS UNDER OXIDIZING CONDITIONS AND THE NITROGEN CONTENT OF ENGINE EXHAUST GAS UNDER REDUCING CONDITIONS COMPRISING CONTACTING SAID EXHAUST GAS UNDER SAID OXIDIZING OR REDUCING CONDITIONS AT ENGINE EXHAUST TEMPERATURE WITH AN EXHAUST GAS CATALYST CONSISTING ESSENTIALLY OF A UNIFORM METAL OXIDE COMPOSITION DEPOSITED ON A CATALYST SUPPORT, SAID METALOXIDE COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 0.1-10 WEIGHT PER CENT OF A FIRST METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, NICKEL AND COBALT, 1-20 WEIGHT PER CENT OF A RARE EARTH METAL, AND 0.1-20 WEIGHT PER CENT OF MANGANESE, IN AN OXIDE FROM, SAID PERCENTAGES BASED UPON THE TOTAL CATALYST WEIGHT, THE BALANCE OF SAID CATALYST CONSISTING OF SAID CATALYST SUPPORT, THE ATOM RATIO OF THE SUN OF SAID FIRST METAL AND SAID RARE EARTH METAL TO MANGANESE BEING 1-3:1, SAID METAL OXIDE DEPOSIT HAVING A PEROVSKITE TYPE CRYSTAL STRUCTURE AS SHOWN BY X-RAY DIFFRACTION.
Claim 3
Dependent Claim
11 words
A method of claim 1 wherein said first metal is copper.
Claim 4
Dependent Claim
11 words
A method of claim 2 wherein said support is an alumina.
Claim 5
Dependent Claim
12 words
A method of claim 3 wherein said rare earth metal is lanthanum.
Claim 6
Dependent Claim
21 words
A method of claim 4 wherein the atom ratio of said copper to said lanthanum to said manganese is about 0.8-1.2:1.7-2.3:2.5-3.5.
Claim 7
Dependent Claim
17 words
A method of claim 5 wherein said ratio of copper to lanthanum to manganese is about 1:2:3.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |