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US4151123A
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US
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Catalytic perovskites on perovskite supports and process for preparing them
Assignee: EIDP Inc
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Filing: 1976-10-15
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Granted: 1979-04-24
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Expires: 1996-10-15
Abstract
Abstract Catalytic activity of metal oxides is enhanced through application of the metal oxide to a second metal oxide having a perovskite crystal structure.
Inventors
- 👤 Elrey L. McCann, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:23
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01D53/74; B01D53/86; B01D53/8668; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/944; B01J; B01J23/00; B01J23/002; B01J23/38; B01J23/54; B01J23/70; B01J23/76; B01J23/89; B01J23/8933; B01D2251/00; B01D2251/20; B01D2251/204; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1021; B01D2255/1025; B01D2255/20; B01D2255/206; B01D2255/2063; B01D2255/207; B01D2255/40; B01D2255/402; B01J2523/00; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
167 words
A catalytic composition comprising a catalytically effective amount of at least one first metal oxide on a support of a second metal oxide, each of the first and second metal oxides having a perovskite crystal structure and the general formula, ABO 3 , the first metal oxide having A site cations comprising at least one metal selected from Group 2A, lanthanum and the lanthanide rare earth metals, and having B site cations comprising at least one metal having an atomic number of 23 to 30, 42 to 47, or 74 to 79, the second metal oxide containing substantially equal numbers of metal cations in the A and the B sites, the A site cations being cations of at least one metal from Groups 1A, 1B, 2A, 3B, 4A, 5A, and the lanthanide rare earth metals, the B site cations being cations of at least one metal from Groups 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6B, 7B, 8 and the lanthanide rare earth metals.
Claim 2
Dependent Claim
167 words
A catalytic composition comprising a catalytically effective amount of at least one first metal oxide on a support of a second metal oxide, each of the first and second metal oxides having a perovskite crystal structure and the general formula, ABO 3 , the first metal oxide having A site cations comprising at least one metal selected from Group 2A, lanthanum and the lanthanide rare earth metals, and having B site cations comprising at least one metal having an atomic number of 23 to 30, 42 to 47, or 74 to 79, the second metal oxide containing substantially equal numbers of metal cations in the A and the B sites, the A site cations being cations of at least one metal from Groups 1A, 1B, 2A, 3B, 4A, 5A, and the lanthanide rare earth metals, the B site cations being cations of at least one metal from Groups 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6B, 7B, 8 and the lanthanide rare earth metals.
Claim 3
Dependent Claim
40 words
A catalytic composition of claim 1 wherein the first metal oxide contains at least one metal having an atomic number from 23 to 30 and at least one metal having an atomic number 42 to 47 or 74 to 79.
Claim 4
Dependent Claim
26 words
A catalytic composition of claim 2 wherein the first metal oxide contains at least about 1% of at least one metal selected from platinum and ruthenium.
Claim 5
Dependent Claim
23 words
A catalytic composition of claim 1 wherein the second metal oxide has a Lattice Stability Index of less than about 12.3 electron volts.
Claim 6
Dependent Claim
19 words
A catalytic composition of claim 1 wherein the first and second metal oxides contain at least one common metal.
Claim 7
Dependent Claim
14 words
A catalytic composition of claim 1 wherein the second metal oxide is calcium titanate.
Claim 8
Dependent Claim
14 words
A catalytic composition of claim 1 wherein the second metal oxide is lanthanum aluminate.
Claim 9
Dependent Claim
173 words
A process for the preparation of catalytic compositions comprising applying a catalytically effective amount of at least one first metal oxide on a support of a second metal oxide, each of the first and second metal oxides having a perovskite crystal structure and a general formula, ABO 3 , the first metal oxide having A site cations comprising at least one metal selected from Group 2A, lanthanum and the lanthanide rare earth metals and having B site cations comprising at least one metal having an atomic number of 23 to 30, 42 to 47 or 74 to 79, the second metal oxide containing substantially equal numbers of metal cations in the A and the B sites, the A site cations being cations of at least one metal from Groups 1A, 1B, 2A, 3B, 4A, 5A and the lanthanide rare earth metals, the B site cations being cations of at least one metal from Groups 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6B, 7B, 8 and the lanthanide rare earth metals.
Claim 10
Dependent Claim
173 words
A process for the preparation of catalytic compositions comprising applying a catalytically effective amount of at least one first metal oxide on a support of a second metal oxide, each of the first and second metal oxides having a perovskite crystal structure and a general formula, ABO 3 , the first metal oxide having A site cations comprising at least one metal selected from Group 2A, lanthanum and the lanthanide rare earth metals and having B site cations comprising at least one metal having an atomic number of 23 to 30, 42 to 47 or 74 to 79, the second metal oxide containing substantially equal numbers of metal cations in the A and the B sites, the A site cations being cations of at least one metal from Groups 1A, 1B, 2A, 3B, 4A, 5A and the lanthanide rare earth metals, the B site cations being cations of at least one metal from Groups 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6B, 7B, 8 and the lanthanide rare earth metals.
Claim 11
Dependent Claim
60 words
A process of claim 8 comprising applying the first metal oxide to the second metal oxide by immersing the second metal oxide in a solution of precursors of the first metal oxide, removing the solvent, and heating the resulting coated second metal oxide for a time and at a temperature sufficient to convert the precursors to the first metal oxide.
Claim 12
Dependent Claim
13 words
A catalytic composition of claim 1 wherein the first metal oxide contains lanthanum.
Claim 13
Dependent Claim
13 words
A catalytic composition of claim 1 wherein the first metal oxide contains strontium.
Claim 14
Dependent Claim
13 words
A catalytic composition of claim 1 wherein the first metal oxide contains cobalt.
Claim 15
Dependent Claim
23 words
A catalytic composition of claim 1 wherein [Sr 0 .2 La 0 .8 ] [Co] O 3 is on the perovskite calcium titanate.
Claim 16
Dependent Claim
41 words
A catalytic composition of claim 1 wherein [Sr 0 .4 La 0 .6] [Co 0 .9 Pt 0 .1] O 3 is on the perovskite [Sr 0 .4 La 0 .6 ] [Co 0 .8 V 0 .2 ]O 3 .
Claim 17
Dependent Claim
28 words
A catalytic composition of claim 1 wherein [Sr 0 .2 La 0 .8 ] [Co 0 .9 Ru 0 .1 ]O 3 is on the perovskite lanthanum aluminate.
Claim 18
Dependent Claim
42 words
A catalytic composition of claim 1 wherein [Sr 0 .4 La 0 .6 ] [Co 0 .9 Pt 0 .1 ]O 3 is on the perovskite [Ba 0 .4 La 0 .6 ] [Co 0 .8 V 0 .2 ]O 3 .
Claim 19
Dependent Claim
28 words
A catalytic composition of claim 1 wherein [Sr 0 .2 La 0 .8 ] [Al 0 .9 Ru 0 .1 ]O 3 is on the perovskite lanthanum aluminate.
References Cited (Backward Citations)
US3259454A
Cited
US3699683A
Cited
US3900428A
Cited
US3901828A
Cited
US3905918A
Cited
US3897367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |