EP0089199A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catalysts for converting reductive and oxidative gases of exhaust gases into innoxious gases
Assignee: Panasonic Holdings Corp
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Filing: 1983-03-11
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Granted: —
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Expires: 2003-03-11
Abstract
Abstract A catalyst for converting harmful reductive and oxidative gases in exhaust gases into innoxious gases is provided. The catalyst essentially consists of a perovskite oxide represented by the general formula in which Me is an element such as Fe, Mn, Cr, V or Ti and x is a number of from 0.15 to 0.90. In order to fabricate durable catalysts, the catalytic component is supported on heat-resistant expanded metal or inorganic fiber meshworks or hollows cylinders of heat-resistant anti-corrosion metals or refractory materials with or without catalyst-bearing pellets.
Inventors
- 👤 Satoshi Sekido
- 👤 Hirokazu Tachibana
- 👤 Yoshito Ninomiya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 21:41
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/002; B01J23/70; B01J23/76; B01J23/78; B01J23/84; B01J23/847; B01J23/8472; B01J23/85; B01J23/86; B01J23/862; B01J23/889; B01J23/8892; B01J2523/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
57 words
A catalyst for the conversion of reductive and oxidative gases in exhaust gases into innoxious gases, said catalyst essentially consisting of a perovskite oxide represented by the general formula in which Me is an element selected from the group consisting of Fe, Mn, Cr, V and Ti and x is a number of from 0.15 to 0.90.
Claim 2
Dependent Claim
57 words
A catalyst for the conversion of reductive and oxidative gases in exhaust gases into innoxious gases, said catalyst essentially consisting of a perovskite oxide represented by the general formula in which Me is an element selected from the group consisting of Fe, Mn, Cr, V and Ti and x is a number of from 0.15 to 0.90.
Claim 3
Dependent Claim
14 words
A catalyst according to Claim 1, wherein said catalyst has a form of pellets.
Claim 4
Dependent Claim
14 words
A catalyst according to Claim 1, further comprising a support for said perovskite oxide.
Claim 5
Dependent Claim
16 words
A catalyst according to Claim 3, wherein said support is a heat-resistant anti-corrosion expanded metal meshwork.
Claim 6
Dependent Claim
14 words
A catalyst according to Claim 3, wherein said support is an inorganic fiber meshwork.
Claim 7
Dependent Claim
81 words
A catalyst for the conversion of reductive and oxidative gases in exhaust gases into innoxious gases, said catalyst comprising pellets of a perovskite oxide represented by the general formula in which Me is an element selected from the group consisting of Fe, Mn, Cr, V and Ti and x is a number of from 0.15 to 0.90, and at least one heat-resistant netting mounting thereon said pellets and adapted to be disposed in a path of an exhaust gas being treated.
Claim 8
Dependent Claim
81 words
A catalyst for the conversion of reductive and oxidative gases in exhaust gases into innoxious gases, said catalyst comprising pellets of a perovskite oxide represented by the general formula in which Me is an element selected from the group consisting of Fe, Mn, Cr, V and Ti and x is a number of from 0.15 to 0.90, and at least one heat-resistant netting mounting thereon said pellets and adapted to be disposed in a path of an exhaust gas being treated.
Claim 9
Dependent Claim
26 words
A catalyst according to Claim 6, wherein said at least one netting is formed from material selected from heat-resistant anti-corrosion metal materials and inorganic refractory materials.
Claim 10
Dependent Claim
105 words
A catalyst for the conversion of reductive and oxidative gases in exhaust gases into innoxious gases, said catalyst comprising a molded hollow cylinder having at least on the surface thereof a perovskite oxide represented by the general formula in which Me is an element selected from the group consisting of Fe, Mn, Cr, V and Ti and x is a number of from 0.15 to 0.90, said cylinder adapted to pass therethrough an exhaust gas being treated whereby the exhaust gas is brought into contact with the perovskite oxide during the passage thereby converting reductive and oxidative gases of said exhaust gas into innoxious gases.
Claim 11
Dependent Claim
105 words
A catalyst for the conversion of reductive and oxidative gases in exhaust gases into innoxious gases, said catalyst comprising a molded hollow cylinder having at least on the surface thereof a perovskite oxide represented by the general formula in which Me is an element selected from the group consisting of Fe, Mn, Cr, V and Ti and x is a number of from 0.15 to 0.90, said cylinder adapted to pass therethrough an exhaust gas being treated whereby the exhaust gas is brought into contact with the perovskite oxide during the passage thereby converting reductive and oxidative gases of said exhaust gas into innoxious gases.
Claim 12
Dependent Claim
17 words
A catalyst according to Claim 8. wherein said hollow cylinder is entirely made of the perovskite oxide.
Claim 13
Dependent Claim
14 words
A catalyst according to Claim 8, wherein said hollow cylinder has a honeycomb structure.
Claim 14
Dependent Claim
27 words
A catalyst according to Claim 8, wherein said hollow cylinder includes a porous ceramic cylinder having said perovskite oxide deposited on the surfaces and in pores thereof.
Claim 15
Dependent Claim
21 words
A catalyst according to Claim 8. wherein said hollow cylinder includes therein pellets of the perovskite oxide or perovskite oxide-bearing pellets.
References Cited (Backward Citations)
No citation records indexed.
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