Patent US5255307A successfully refreshed from Google Patents.
Patent US5250489A 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 14:08
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.
References Cited (Backward Citations)
US3969082A
Cited
US3956188A
Cited
US3966391A
Cited
US4008037A
Cited
US4088435A
Cited
US3920583A
Cited
US3970435A
Cited
US4019969A
Cited
GB1528455A
Cited
US4101287A
Cited
US4287856A
Cited
US4331631A
Cited
US4279782A
Cited
US4318828A
Cited
US4366668A
Cited
US4673663A
Cited
US4414023A
Cited
JPS6014939A
Cited
JPS6014938A
Cited
JPS6026211A
Cited
JPS6051545A
Cited
JPS6051544A
Cited
JPS6051543A
Cited
JPS6054736A
Cited
JPS6060411A
Cited
JPS6060424A
Cited
JPS6066022A
Cited
US4601999A
Cited
US4731989A
Cited
JPS60147243A
Cited
JPS60175925A
Cited
JPS60196511A
Cited
JPS60202745A
Cited
JPS60202235A
Cited
JPS60200021A
Cited
JPS60205116A
Cited
JPS60205115A
Cited
JPS60205129A
Cited
JPS60222145A
Cited
US4521532A
Cited
JPS60238148A
Cited
JPS6133233A
Cited
JPS6138627A
Cited
JPS61147014A
Cited
JPS61235609A
Cited
JPS61237905A
Cited
JPS61252409A
Cited
JPS61252408A
Cited
JPS61259013A
Cited
JPS6241511A
Cited
JPS6246116A
Cited
JPS6249125A
Cited
JPS6279847A
Cited
JPS6280419A
Cited
JPS6280420A
Cited
JPS6284215A
Cited
JPS62112910A
Cited
US4742038A
Cited
JPS62125210A
Cited
US4780824A
Cited
JPS62158910A
Cited
US4784984A
Cited
JPS62216642A
Cited
US4752599A
Cited
JPS62261803A
Cited
JPS6341720A
Cited
JPS63190644A
Cited
JPS6380847A
Cited
JPS6380849A
Cited
JPS6380848A
Cited
JPS63213723A
Cited
JPS63267804A
Cited
JPH01139911A
Cited
JPH01210707A
Cited
JPH01242151A
Cited
JPH0221117A
Cited
JPH0252930A
Cited
US4893465A
Cited
JPH0259045A
Cited
JPH02211255A
Cited
JPH02213607A
Cited
JPH02238206A
Cited
JPH02268830A
Cited
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 |