US4110251A
Expired / Lapsed
US
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Metal oxyhalide catalytic compositions
Assignee: EIDP Inc
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Filing: 1976-09-22
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Granted: 1978-08-29
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Expires: 1996-09-22
Abstract
Abstract Metal oxyhalides of the general formula ABO 3-f X f having perovskite-type crystal structures in which A and B are each cations of at least one metal and a portion of the type B cations are catalytically active; X is fluoride or chloride; and f is about from 0.01 to 1.0; useful for the promotion of oxidation and reduction reactions, including those involved in the cleanup of exhaust gases of internal combustion engines.
Inventors
- 👤 Alan Lauder
- 👤 Elrey L. McCann, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:30
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J; B01J23/00; B01J23/002; B01J23/38; B01J23/54; B01J23/56; B01J23/70; B01J23/76; B01J23/89; B01J23/8933; B01J27/00; B01J27/06; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C5/00; C07C5/32; C07C5/321; B01J2523/00; Y; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
157 words
A catalytic composition of the general formula ABO 3-f X f and having a perovskite crystal structure, wherein the Type A cations are cations of at least one metal selected from the Groups IA, IB, IIA, IIB, IIIB, IVA, VA, the lanthanide rare earth metals and the actinide rare earth metals, said cations having ionic radii between about 0.8 to 1.65 Angstroms; the Type B cations are cations of at least one metal selected from Groups IA, IIA, IIB, IIIA, IIIB, IVA, IVB, VA, VB, VIB, VIIB, the metals of atomic numbers 24 to 30, and the platinum metals, said cations having ionic radii between about 0.4 to 1.4 Angstroms; with the proviso that at least 1% of the Type B cations are cations of at least one metal selected from the metals having atomic numbers 24 to 30,and the platinum metals; O is oxide; X is fluoride or chloride; and f is about 0.01 to 1.0.
Claim 2
Dependent Claim
157 words
A catalytic composition of the general formula ABO 3-f X f and having a perovskite crystal structure, wherein the Type A cations are cations of at least one metal selected from the Groups IA, IB, IIA, IIB, IIIB, IVA, VA, the lanthanide rare earth metals and the actinide rare earth metals, said cations having ionic radii between about 0.8 to 1.65 Angstroms; the Type B cations are cations of at least one metal selected from Groups IA, IIA, IIB, IIIA, IIIB, IVA, IVB, VA, VB, VIB, VIIB, the metals of atomic numbers 24 to 30, and the platinum metals, said cations having ionic radii between about 0.4 to 1.4 Angstroms; with the proviso that at least 1% of the Type B cations are cations of at least one metal selected from the metals having atomic numbers 24 to 30,and the platinum metals; O is oxide; X is fluoride or chloride; and f is about 0.01 to 1.0.
Claim 3
Dependent Claim
14 words
A catalytic composition of claim 1 wherein f is about from 0.05 to 0.5.
Claim 4
Dependent Claim
31 words
A catalytic composition of claim 1 comprising cations of at least one metal having an atomic number of from 24-30, occupying at least about 10% of the Type B cation sites.
Claim 5
Dependent Claim
59 words
A catalytic composition of claim 3 wherein at least about 5% of the Type B cation sites occupied by cations of metals having atomic numbers 24-29 are occupied by metal ions in a first valence and at least a further 5% of the Type B cation sites are occupied by ions of the same metal in a second valence.
Claim 6
Dependent Claim
31 words
A catalytic composition of claim 1 which comprises cations of at least one platinum metal, and the platinum metal cations occupy about from 1 to 20% of the Type B sites.
Claim 7
Dependent Claim
33 words
A catalytic composition of claim 3 wherein the Type B cation sites not occupied by catalytic metal cations are occupied by cations of metals having a first ionization potential not greater than 7.10.
Claim 8
Dependent Claim
52 words
A catalytic composition of claim 1 wherein the Type A cations and the Type B cations and their proportions are chosen such that the sum of the products of the atomic fractions of all the cations and the first ionization potentials of all the corresponding metals is not greater than 13.2 electron-volts.
Claim 9
Dependent Claim
10 words
A catalytic composition of claim 1 on a shaped support.
Claim 10
Dependent Claim
32 words
A catalytic composition of claim 5 further comprising cations of at least one metal having an atomic number of from 24-29, occupying at least about 10% of the Type B cation sites.
Claim 11
Dependent Claim
30 words
A catalytic composition of claim 1 wherein substantially all of the Type A cation sites are occupied by cations of metals having a first ionization potential not greater than 6.9.
Claim 12
Dependent Claim
21 words
The catalytic composition of claim 1 having the formula [La][Fe 0 .8 Al 0 .2 ]O 2 .8 F 0 .2.
Claim 13
Dependent Claim
21 words
The catalytic composition of claim 1 having the formula [La][Cr 0 .8 Al 0 .2 ]O 2 .9 Cl 0 .1.
Claim 14
Dependent Claim
30 words
The catalytic composition of claim 1 having the formula [La 0 .2 Ba 0 .8 ][Cu 0 .5 Al 0 .1 Mo 0 .4 ]O 2 .7 F 0 .3.
Claim 15
Dependent Claim
27 words
The catalytic composition of claim 1 having the formula [La 0 .4 Th 0 .1 ][Fe 0 .5 Cr 0 .5 ]O 2 .6 F 0 .4.
Claim 16
Dependent Claim
27 words
The catalytic composition of claim 1 having the formula [La 0 .5 Sr 0 .5 ][Al 0 .9 Pt 0 .1 ]O 2 .6 F 0 .4.
Claim 17
Dependent Claim
27 words
The catalytic composition of claim 1 having the formula [La 0 .5 Sr 0 .5 ][Al 0 .9 Pt 0 .1 ]O 2 .6 Cl 0 .4.
Claim 18
Dependent Claim
30 words
The catalytic composition of claim 1 having the formula [La 0 .75 Sr 0 .25 ][Al 0 .4 Pt 0 .1 Co 0 .5 ]O 2 .6 F 0 .4.
Claim 19
Dependent Claim
28 words
A catalytic composition of claim 1 wherein the Type A cations are selected from Na, K, Ca, Ba, La or a mixture of the lanthanide rare earth metals.
Claim 20
Dependent Claim
19 words
A catalytic composition of claim 1 wherein the Type A cations consist essentially of a lanthanide rare earth metal.
Claim 21
Dependent Claim
29 words
A catalytic composition of claim 1 wherein the Type A cations consist essentially of a lanthanide rare earth metal and a metal of Group 11A of the Periodic Table.
Claim 22
Dependent Claim
13 words
A catalytic composition of claim 1 wherein the Type B cations comprise aluminum.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |