EP0503500A1
Expired / Lapsed
EP
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Catalytic body and process for producing the same
Assignee: Panasonic Holdings Corp
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Filing: 1992-03-06
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Granted: —
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Expires: 2012-03-06
Abstract
Abstract A catalytic body contains a base material and, formed on the surface thereof, a catalytic coating layer containing activated alumina, zeolite, a platinum group metal and an inorganic binder. By alternately repeating the step of adsorption of odor components with zeolite and alumina under non-heating condition and the step of heat-regeneration of the zeolite and alumina and catalytic decomposition of odor components under heating condition, offensive odors can be continuously removed over a long period and without excessively raising the temperature in the surroundings of the catalytic body.
Inventors
- 👤 Yukiyoshi Ono
- 👤 Kunio Kimura
- 👤 Hidenobu Wakita
- 👤 Yasue Yamade
- 👤 Hirofumi Nishida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 01:34
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J37/00; B01J37/02; B01J37/024; B01J37/0244; B01J37/0246
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
31 words
A catalytic body which comprises a base material and, formed on the surface thereof, a catalytic coating layer comprising activated alumina, a zeolite, a platinum group metal and an inorganic binder.
Claim 2
Dependent Claim
22 words
The catalytic body according to Claim 1, wherein the content of activated alumina in the catalytic coating layer is 20-80% by weight.
Claim 3
Dependent Claim
16 words
The catalytic body according to Claim 1 or 2, wherein the zeolite is a copper-containing zeolite.
Claim 4
Dependent Claim
15 words
The catalytic body according to Claims 1 to 3, wherein the inorganic binder is silica.
Claim 5
Dependent Claim
21 words
The catalytic body according to Claim 4, wherein the content of silica in the catalytic coating layer is 10-40% by weight.
Claim 6
Dependent Claim
18 words
The catalytic body according to Claims 1 to 5, wherein the activated alumina comprises a platinum group metal.
Claim 7
Dependent Claim
19 words
The catalytic body according to Claims 1 to 6, wherein the catalytic coating layer contains an alkaline earth metal.
Claim 8
Dependent Claim
14 words
The catalytic body according to Claim 7, wherein the alkaline earth metal is barium.
Claim 9
Dependent Claim
28 words
The catalytic body according to Claim 7 or 8 wherein the content of alumina containing an alkaline earth metal in the catalytic coating layer is 5-30% by weight.
Claim 10
Dependent Claim
62 words
A catalytic body which comprises a base material and, formed on the surface thereof, a coating layer of double-layer structure consisting of a catalyst layer comprising activated alumina, a zeolite and a platinum group metal and a protective coating layer comprising at least one member selected from the group consisting of alumina and silica formed on the surface of the catalyst layer.
Claim 11
Dependent Claim
67 words
A process for producing a catalytic body which comprises the steps of coating on the surface of a base material a mixed slurry comprising activated alumina or aluminum hydroxide, a zeolite and a platinum group metal salt, the median diameter of the particles in the slurry being between 1 µm inclusive and 9 µm inclusive, and drying and firing the coating to form a catalytic coating layer.
References Cited (Backward Citations)
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