US5712220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coompositions capable of operating under high carbon dioxide partial pressures for use in solid-state oxygen producing devices
Assignee: Air Products and Chemicals Inc
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Filing: 1996-02-29
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Granted: 1998-01-27
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Expires: 2016-02-29
Abstract
Abstract The present invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating components used in solid-state oxygen separation devices. The compositions of the present invention are represented by the formula Ln x A' x' A" x" B y B' y' B" y" O 3-z , wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B,B',B" are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0≦x<1, 0<x'<1, 0≦x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the compound charge neutral wherein such elements are represented according to the Periodic Table of the Elements adopted by IUPAC. These compositions provide superior resistance to degradation when employed in such devices under process conditions of high carbon dioxide and water partial pressures.
Inventors
- 👤 Michael Francis Carolan
- 👤 Paul Nigel Dyer
- 👤 Stephen Andrew Motika
- 👤 Patrick Benjamin Alba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:21
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/14; B01D69/141; B01D69/145; B01D53/00; B01D53/22; B01D53/228; B01D67/00; B01D67/0039; B01D67/0041; B01D67/00411; B01D67/0046; B01D67/0072; B01D71/00; B01D71/02; B01D71/024; B01D71/0271; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0251; C01B13/0255; C01G; C01G49/00; C01G49/0018; C01G49/009; C01G51/00; C01G51/40; C01G51/66; C01G51/68; C04; C04B; C04B35/00; C04B35/01; C04B35/45; B01D2257/00; B01D2257/10; B01D2257/104; B01D2325/00; B01D2325/26; C01B2210/00; C01B2210/0043; C01B2210/0046; C01P; C01P2002/00; C01P2002/30; C01P2002/34; C01P2002/50; C01P2002/52; C01P2002/54; C01P2004/00; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A composition of matter represented by the formula Ln x A' x' A" x" B y B' y' B" y" O 3-z , wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B, B', B" are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0≦x<1, 0<x'<1, 0≦x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the compound charge neutral wherein such elements are represented according to the Periodic Table of the Elements adopted by IUPAC.
Claim 2
Dependent Claim
107 words
A composition of matter represented by the formula Ln x A' x' A" x" B y B' y' B" y" O 3-z , wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B, B', B" are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0≦x<1, 0<x'<1, 0≦x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the compound charge neutral wherein such elements are represented according to the Periodic Table of the Elements adopted by IUPAC.
Claim 3
Dependent Claim
29 words
The composition according to claim 1 wherein Ln is a mixture of lanthanum and at least one element other than lanthanum which is selected from the f block lanthanides.
Claim 4
Dependent Claim
66 words
A composition of matter represented by the formula La x A' x' A" x" Co y Fe y' Cu y" O 3-z wherein A' is selected from strontium, barium, calcium or magnesium, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, wherein 0≦x<1, 0<x'<1, 0≦x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the composition charge neutral.
Claim 5
Dependent Claim
66 words
A composition of matter represented by the formula La x A' x' A" x" Co y Fe y' Cu y" O 3-z wherein A' is selected from strontium, barium, calcium or magnesium, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, wherein 0≦x<1, 0<x'<1, 0≦x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the composition charge neutral.
Claim 6
Dependent Claim
31 words
The composition of matter according to claim 3 wherein A' is barium, x is 0.2, x' is 0.8, x" is 0, y is 0.62, y' is 0.21 and y" is 0.21.
Claim 7
Dependent Claim
31 words
The composition of matter according to claim 3 wherein A' is strontium, x is 0.2, x' is 0.8, x" is 0, y is 0.41, y' is 0.41 and y" is 0.21.
Claim 8
Dependent Claim
31 words
The composition of matter according to claim 3 wherein A' is strontium, x is 0.4, x' is 0.6, x" is 0, y is 0.41, y' is 0.41 and y" is 0.21.
Claim 9
Dependent Claim
33 words
The composition of matter according to claim 3 wherein 1 wherein A' is strontium, x is 0.3, x' is 0.7, x' is 0, y is 0.82, y' is 0.11 and y" is 0.11.
Claim 10
Dependent Claim
31 words
The composition of matter according to claim 3 wherein A' is strontium, x is 0.2, x' is 0.8, x" is 0, y is 0.42, y' is 0.42 and y" is 0.21.
Claim 11
Dependent Claim
31 words
The composition of matter according to claim 3 wherein A' is strontium, x is 0, x' is 1.0, x" is 0, y is 0.42, y' is 0.42 and y" is 0.21.
References Cited (Backward Citations)
US5306411A
Cited
US5261932A
Cited
US5269822A
Cited
US5240480A
Cited
US5356728A
Cited
US5534471A
Cited
US5569633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-01-26 | 2001-07-28 | 2002-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-26 | 2005-07-28 | 2006-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-26 | 2009-07-28 | 2010-01-27 | $7700.00 | Window Closed / Lapsed |