EP0268265A2
Expired / Lapsed
EP
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Denitration catalyst for reducing nitrogen oxides in exhaust gas
Assignee: Mitsubishi Chemical Corp
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Filing: 1987-11-17
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Granted: —
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Expires: 2007-11-17
Abstract
Abstract A denitration catalyst comprising an oxide of titanium, an oxide of tungsten and an oxide of vanadium as catalytically active ingredients and having a specific surface area, measured by the BET method, of 80 to 200 m²/g and a pore volume, measured by the mercury penetration method, of 0.1 to 0.5 cc/g.
Inventors
- 👤 Makoto Imanari
- 👤 Takeo Koshikawa
- 👤 Akihiro Yamauchi
- 👤 Masayuki Hanada
- 👤 Morio Fukuda
- 👤 Kiyoshi Nagano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:50
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J23/00; B01J23/16; B01J23/24; B01J23/30; B01J21/00; B01J21/06; B01J21/063; B01J23/20; B01J23/22; B01J35/61; B01J35/613; B01J35/63; B01J35/633
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A denitration catalyst comprising an oxide of titanium, an oxide of tungsten and an oxide of vanadium as catalytically active ingredients and having a specific surface area, measured by the BET method, of 80 to 200 m²/g and a pore volume, measured by the mercury penetration method, of 0.1 to 0.5 cc/g.
Claim 2
Dependent Claim
52 words
A denitration catalyst comprising an oxide of titanium, an oxide of tungsten and an oxide of vanadium as catalytically active ingredients and having a specific surface area, measured by the BET method, of 80 to 200 m²/g and a pore volume, measured by the mercury penetration method, of 0.1 to 0.5 cc/g.
Claim 3
Dependent Claim
18 words
The catalyst of claim 1 wherein the specific surface area of the catalyst is 100 to 170 m²/g.
Claim 4
Dependent Claim
17 words
The catalyst of claim 1 wherein the pore volume of the catalyst is 0.2 to 0.4 cc/g.
Claim 5
Dependent Claim
37 words
The catalyst of claim 1 which contains both a group of micropores having a pore diameter smaller than 100 Å and a group of macropores having a pore diameter of 100 Å to 1 × 10⁵ Å
Claim 6
Dependent Claim
30 words
The catalyst of claim 4 wherein 30 to 70% of the specific surface area of the catalyst is accounted for by the specific surface area of said group of micropores.
Claim 7
Dependent Claim
28 words
The catalyst of claim 1 wherein the content of the oxide of titanium, the oxide of tungsten and the oxide of vanadium is 40 to 99% by weight.
Claim 8
Dependent Claim
38 words
The catalyst of claim 1 wherein the amount of the oxide of titanium is 50 to 99% by weight based on the total weight of the oxide of titanium, the oxide of tungsten and the oxide of vanadium.
Claim 9
Dependent Claim
38 words
The catalyst of claim 1 wherein the amount of the oxide of tungsten is 0.5 to 50% by weight based on the total weight of the oxide of titanium, the oxide of tungsten and the oxide of vanadium.
Claim 10
Dependent Claim
38 words
The catalyst of claim 1 wherein the amount of the oxide of vanadium is 0.1 to 5% by weight based on the total weight of the oxide of titanium, the oxide of tungsten and the oxide of vanadium.
Claim 11
Dependent Claim
45 words
A method of denitrating an exhaust gas which comprises contacting an exhaust gas containing nitrogen oxides and a small amount of an arsenic compound with a reducing gas in the presence of the denitration catalyst of claim 1 at a temperature of 100 to 550°C.
References Cited (Backward Citations)
No citation records indexed.
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