US4168945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosion proof bed for catalyst combustion heater
Assignee: 408218 ALBERTA Ltd
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Filing: 1978-01-20
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Granted: 1979-09-25
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Expires: 1998-01-20
Abstract
Abstract The incorporation into a catalyst bed for a catalytic combustion heater including carrier material and a platinum and/or palladium catalyst, of iron oxide in amounts sufficient to render the bed explosion-proof when operated in explosive and inflammable atmospheres. The ratio by weight of the iron oxide to the catalyst is at least 7:1 to provide a stable explosion-proof catalyst bed.
Inventors
- 👤 Alan C. Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:21
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8906; B01J35/00; B01J35/50; B01J35/58
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
88 words
In a catalyst bed for a catalytic heater for the production of useful heat by catalytic combustion of a gaseous fuel, the bed comprising a porous carrier including a catalyst capable of supporting catalytic combustion of a gaseous fuel when incorporated as part of a catalytic combustion heater connected to a supply of the gaseous fuel, the improvement wherein said catalyst bed includes an added amount of iron oxide sufficient to render the catalyst bed explosion-proof during catalytic combustion of the gaseous fuel in a catalytic combustion heater.
Claim 2
Dependent Claim
88 words
In a catalyst bed for a catalytic heater for the production of useful heat by catalytic combustion of a gaseous fuel, the bed comprising a porous carrier including a catalyst capable of supporting catalytic combustion of a gaseous fuel when incorporated as part of a catalytic combustion heater connected to a supply of the gaseous fuel, the improvement wherein said catalyst bed includes an added amount of iron oxide sufficient to render the catalyst bed explosion-proof during catalytic combustion of the gaseous fuel in a catalytic combustion heater.
Claim 3
Dependent Claim
19 words
A catalyst bed for a catalytic heater as claimed in claim 1 wherein said catalyst includes platinum and/or palladium.
Claim 4
Dependent Claim
32 words
A catalyst bed for a catalytic heater as claimed in claim 2 wherein the ratio by weight of iron oxide to the platinum and/or palladium catalyst is at least 7 to 1.
Claim 5
Dependent Claim
33 words
A catalyst bed for a catalytic heater as claimed in claim 2 wherein the ratio by weight of iron oxide to the weight of catalyst bed is at least about 1 to 15.
Claim 6
Dependent Claim
17 words
A catalyst bed for a catalytic heater as claimed in claim 1 wherein said carrier is fibrous.
Claim 7
Dependent Claim
23 words
An explosion-proof catalytic combustion heater comprising a catalyst bed as claimed in claim 1 adapted for connection with a supply of gaseous fuel.
Claim 8
Dependent Claim
23 words
An explosion-proof catalytic combustion heater comprising a catalyst bed as claimed in claim 2 adapted for connection with a supply of gaseous fuel.
Claim 9
Dependent Claim
25 words
A method of avoiding explosion during operation of a catalytic combustion heater, comprising incorporating in the heater a catalyst bed as claimed in claim 1.
Claim 10
Dependent Claim
26 words
A method of avoiding explosion during the operation of a catalytic combustion heater, comprising incorporating in the heater a catalyst bed as claimed in claim 2.
Claim 11
Dependent Claim
64 words
In a method of preparing a catalyst bed for use in a catalytic combustion heater by incorporating in a carrier a catalyst capable of supporting catalytic combustion of a gaseous fuel, the improvement comprising incorporating in the carrier also an added amount of iron oxide sufficient to render the catalyst bed explosion-proof during catalytic combustion of a gaseous fuel in a catalytic combustion heater.
Claim 12
Dependent Claim
64 words
In a method of preparing a catalyst bed for use in a catalytic combustion heater by incorporating in a carrier a catalyst capable of supporting catalytic combustion of a gaseous fuel, the improvement comprising incorporating in the carrier also an added amount of iron oxide sufficient to render the catalyst bed explosion-proof during catalytic combustion of a gaseous fuel in a catalytic combustion heater.
Claim 13
Dependent Claim
14 words
A method as claimed in claim 10 wherein the catalyst comprises platinum and/or palladium.
Claim 14
Dependent Claim
37 words
A method of making an explosion-proof catalytic combustion heater comprising preparing a catalyst bed as claimed in claim 11, and incorporating the bed in a catalytic combustion heater adapted for connection with a supply of gaseous fuel.
Claim 15
Dependent Claim
27 words
A method as claimed in claim 11 wherein fine particles of platinum and/or palladium and iron oxide are formed into a mixture and deposited on the carrier.
Claim 16
Dependent Claim
16 words
A method as claimed in claim 11 wherein the carrier comprises fibers of alumina-silica or alumina.
Claim 17
Dependent Claim
28 words
A method as claimed in claim 11 wherein the ratio by weight of the iron oxide to the platinum and/or palladium catalyst is at least 7 to 1.
Claim 18
Dependent Claim
27 words
A method as claimed in claim 11 wherein the ratio by weight of iron oxide to weight of catalyst bed is at least about 1 to 15.
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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |