Patent EP0349505A2 successfully refreshed from Google Patents.
US5250489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst structure having integral heat exchange
Assignee: Tanaka Precious Metal Technologies Co Ltd
•
Filing: 1990-11-26
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Granted: 1993-10-05
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Expires: 2010-11-26
Abstract
Abstract This invention is a catalyst structure having integral heat exchange surfaces and a method for using the structure in highly exothermic processes, such as a combustion process, while maintaining the catalyst and the structure wall at a temperature below the adiabatic combustion temperature.
Inventors
- 👤 Ralph A. Dalla Betta
- 👤 Fabio H. Ribeiro
- 👤 Toru Shoji
- 👤 Kazunori Tsurumi
- 👤 Nobuyasu Ezawa
- 👤 Sarento G. Nickolas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:40
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/066; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J23/44; B01J35/00; B01J35/50; B01J35/56; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; B01J21/063; F01N2330/00; F01N2330/02; F01N2330/30; F01N2330/32
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
84 words
A catalyst structure comprising a metallic catalyst support comprising aluminum, a high temperature metal alloy, stainless steel, or an aluminum-containing steel having a multitude of longitudinal passageways adapted for the passage of combustible gas and having interior surfaces where at least a portion but not all of the interior surfaces are coated with a catalytic material suitable for oxidizing the combustible gas, and the interior surfaces coated with catalytic material are in heat exchange relationship with interior surfaces not coated with a catalytic material.
Claim 2
Dependent Claim
84 words
A catalyst structure comprising a metallic catalyst support comprising aluminum, a high temperature metal alloy, stainless steel, or an aluminum-containing steel having a multitude of longitudinal passageways adapted for the passage of combustible gas and having interior surfaces where at least a portion but not all of the interior surfaces are coated with a catalytic material suitable for oxidizing the combustible gas, and the interior surfaces coated with catalytic material are in heat exchange relationship with interior surfaces not coated with a catalytic material.
Claim 3
Dependent Claim
12 words
The catalyst structure of claim 1 where some passageways contain catalytic material.
Claim 4
Dependent Claim
14 words
The catalyst structure of claim 1 where each of the passageways contains catalytic material.
Claim 5
Dependent Claim
15 words
The catalyst structure of claim 1 where the metallic catalyst support comprises an aluminum-containing steel.
Claim 6
Dependent Claim
33 words
The catalyst structure of claim 4 wherein the metallic catalyst support additionally comprises a washcoat of zirconia, titania, alumina, silica, or other refractory metal oxide on at least a portion of the support.
Claim 7
Dependent Claim
11 words
The catalyst structure of claim 5 wherein the washcoat comprises alumina.
Claim 8
Dependent Claim
11 words
The catalyst structure of claim 5 where the washcoat comprises zirconia.
Claim 9
Dependent Claim
22 words
The catalyst structure of claim 5 where the washcoat comprises a mixture of at least two of zirconia, titania, alumina, and silica.
Claim 10
Dependent Claim
16 words
The catalyst structure of claim 8 where the washcoat comprises a mixture of zirconia and silica.
Claim 11
Dependent Claim
17 words
The catalyst structure of claim 4 where the catalytic material is one or more platinum group metals.
Claim 12
Dependent Claim
20 words
The catalyst structure of claim 5 where the catalytic material is one or more platinum group metals on the washcoat.
Claim 13
Dependent Claim
12 words
The catalyst structure of claim where 5 the catalytic material comprises platinum.
Claim 14
Dependent Claim
12 words
The catalyst structure of claim 6 where the catalytic material comprises platinum.
Claim 15
Dependent Claim
12 words
The catalytic structure of claim 5 where the catalytic material comprises palladium.
Claim 16
Dependent Claim
12 words
The catalytic structure of claim 7 where the catalytic material comprises palladium.
Claim 17
Dependent Claim
12 words
The catalytic structure of claim 9 where the catalytic material comprises palladium.
Claim 18
Dependent Claim
14 words
The catalytic structure of claim 5 where the catalytic material comprises palladium and platinum.
Claim 19
Dependent Claim
20 words
The catalyst structure of claim 4 wherein the passageways containing catalyst are relatively larger than the passageways not containing catalyst.
Claim 20
Dependent Claim
20 words
The catalyst structure of claim 4 where the passageways containing catalyst are relatively smaller than the passageways not containing catalyst.
Claim 21
Dependent Claim
22 words
The catalyst structure of claim 4 where the passageways containing catalyst are relatively of equal size to the passageways not containing catalyst.
Claim 22
Dependent Claim
33 words
The catalyst structure of claim 18 where the ratio of the open area of the passageways containing catalyst to the open area of the passageways not containing catalyst is between 1:20 and 20.1.
Claim 23
Dependent Claim
33 words
The catalyst structure of claim 19 where the ratio of the open area of the passageways containing catalyst to the open area of the passageways not containing catalyst is between 1:20 and 20:1.
Claim 24
Dependent Claim
33 words
The catalyst structure of claim 20 where the ratio of the open area of the passageways containing catalyst to the open area of the passageways not containing catalyst is between 1:20 and 20:1.
Claim 25
Dependent Claim
18 words
The catalyst structure of claim 4 where the metallic catalyst support comprises a spiral roll of corrugated sheet.
Claim 26
Dependent Claim
21 words
The catalyst structure of claim 4 where the catalyst support is a rolled spiral comprising corrugated sheet and a spacer sheet.
Claim 27
Dependent Claim
16 words
The catalyst structure of claim 4 where the metallic catalyst support is in a herringbone pattern.
Claim 28
Dependent Claim
24 words
The catalyst structure of claim 4 where the metallic catalyst support is assembled comprising generally parallel alternating layers of corrugated and flat spacer sheets.
Claim 29
Dependent Claim
19 words
The catalyst structure of claim 1 where a portion of the surfaces containing catalyst contain a higher activity catalyst.
Claim 30
Dependent Claim
92 words
A catalyst structure comprising a catalyst support of an aluminum-containing steel, having a multitude of longitudinal passageways adapted for the passage of combustible gas and having interior surfaces, where at least a portion but not all of the interior surfaces are coated with a washcoat comprising alumina, zirconia, silica, titania, or the other refractory metal oxide and a catalytic material comprising a platinum group metal which is suitable for oxidizing the combustible gas and those coated surfaces are in a heat exchange relationship with interior surfaces not coated with a catalytic material.
Claim 31
Dependent Claim
92 words
A catalyst structure comprising a catalyst support of an aluminum-containing steel, having a multitude of longitudinal passageways adapted for the passage of combustible gas and having interior surfaces, where at least a portion but not all of the interior surfaces are coated with a washcoat comprising alumina, zirconia, silica, titania, or the other refractory metal oxide and a catalytic material comprising a platinum group metal which is suitable for oxidizing the combustible gas and those coated surfaces are in a heat exchange relationship with interior surfaces not coated with a catalytic material.
Claim 32
Dependent Claim
14 words
The catalyst structure of claim 29 where some of the passageways contain catalytic material.
Claim 33
Dependent Claim
14 words
The catalyst structure of claim 29 where of each the passageways contains catalytic material.
Claim 34
Dependent Claim
14 words
The catalyst structure of claim 29, 30, or 31 where the washcoat comprises alumina.
Claim 35
Dependent Claim
14 words
The catalyst structure of claim 29, 30, or 31 where the washcoat comprises zirconia.
Claim 36
Dependent Claim
20 words
The catalyst structure of claim 29 where the passageways containing catalyst are relatively larger than the passageways not containing catalyst.
Claim 37
Dependent Claim
20 words
The catalyst structure of claim 29 where the passageways containing catalyst are relatively smaller than the passageways not containing catalyst.
Claim 38
Dependent Claim
22 words
The catalyst structure of claim 29 where the passageways containing catalyst are relatively of equal size to the passageways not containing catalyst.
Claim 39
Dependent Claim
18 words
The catalyst structure of claim 29 where the metallic catalyst support comprises a spiral roll of corrugated sheet.
Claim 40
Dependent Claim
21 words
The catalyst structure of claim 29 where the catalyst support is a rolled spiral comprising corrugated sheet and a spacer sheet.
Claim 41
Dependent Claim
16 words
The catalyst structure of claim 37 where the metallic catalyst support is in a herringbone pattern.
Claim 42
Dependent Claim
24 words
The catalyst structure of claim 29 where the metallic catalyst support is assembled comprising generally parallel alternating layers of corrugated and flat spacer sheets.
Claim 43
Dependent Claim
19 words
The catalyst structure of claim 29 where a portion of the surfaces containing catalyst contain a higher activity catalyst.
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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) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |