US4976941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for oxidizing carbon monoxide in exhaust gas from a sintering furnace
Assignee: JFE Steel Corp
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Filing: 1989-06-15
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Granted: 1990-12-11
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Expires: 2009-06-15
Abstract
Abstract A catalyst in the form of a honeycomb structured cordierite carrier having platinum supported in a loading weight of at least 0.20 mg per square centimeter of the apparent outer surface area of the catalyst is effective in a process for oxidizing CO in exhaust gas from a sintering furance wherein it maintains high CO oxidiation efficiency for a longer period of time, requiring less frequently regeneration and less power consumption.
Inventors
- 👤 Takeo Tsunoda
- 👤 Setsu Takeo
- 👤 Tatsuya Nobusawa
- 👤 Norihide Enomoto
- 👤 Hiroyasu Takahashi
- 👤 Minoru Watanabe
- 👤 Yutaka Sasaki
- 👤 Kunihiro Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:30
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A method of oxidizing carbon monoxide present in sintering furnace-exhaust gases containing carbon monoxide comprising the steps of desulfurizing and denitrating the exhaust gases from the sintering furnace; and oxidizing the carbon monoxide contained in the desulfurized/denitrated exhaust gases by contacting said exhaust gases with a catalyst comprising a honeycomb structured carrier of cordierite carrying at least one active ingredient thereon, said active ingredient being comprised of platinum at a loading weight of at least 0.20 mg/cm 2 of the apparent outer surface area of the catalyst, at a catalyst inlet temperature of at least 300° C.
Claim 2
Independent Claim
97 words
A method of oxidizing carbon monoxide present in sintering furnace-exhaust gases containing carbon monoxide comprising the steps of desulfurizing and denitrating the exhaust gases from the sintering furnace; and oxidizing the carbon monoxide contained in the desulfurized/denitrated exhaust gases by contacting said exhaust gases with a catalyst comprising a honeycomb structured carrier of cordierite carrying at least one active ingredient thereon, said active ingredient being comprised of platinum at a loading weight of at least 0.20 mg/cm 2 of the apparent outer surface area of the catalyst, at a catalyst inlet temperature of at least 300° C.
Claim 3
Dependent Claim
20 words
A process as claimed in claim 1, wherein the platinum loading weight is from 0.24 to 0.45 mg/cm 2 .
References Cited (Backward Citations)
US2750329A
Cited
GB971994A
Cited
US3378334A
Cited
GB1330842A
Cited
DE2241583A1
Cited
US4231900A
Cited
JPS5095188A
Cited
US4552733A
Cited
US4200552A
Cited
JPS541289A
Cited
JPS5541812A
Cited
US4369132A
Cited
JPS56121643A
Cited
US4483691A
Cited
US4757045A
Cited
JPS60190239A
Cited
JPS60238153A
Cited
JPS6115740A
Cited
JPH01105994A
Cited
JPH0990294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |