EP0370523A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Carrier for gas-treating catalyst, method for production thereof, and gas-treating catalyst incorporating said carrier therein
Assignee: Nippon Shokubai Co Ltd
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Filing: 1989-11-24
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Granted: —
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Expires: 2009-11-24
Abstract
Abstract A carrier for a waste gas-treating catalyst, comprising an inorganic refractory oxide containing a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄, which is produced by heat-treating a substance containing a titanium compound and a zirconium compound at a temperature in the range of 600° to 1,000°C, and a catalyst for treatment of a waste gas comprising the carrier deposited a catalytically active component.
Inventors
- 👤 Kiichiro Mitsui
- 👤 Tooru Ishii
- 👤 Kunio Sano
- 👤 Akira Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 04:38
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/066; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8643; B01D53/8646; B01D53/865; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; B01J21/063; B01J23/00; B01J23/38; B01J37/00; B01J37/02; B01J37/03; B01D2251/00; B01D2251/20; B01D2251/206; B01D2251/2062; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1021; B01D2255/1023; B01D2255/20; B01D2255/207; B01D2255/20707; B01D2255/20715; B01D2255/2073; B01D2255/20776; Y; Y10; Y10S; Y10S502/00; Y10S502/524
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
26 words
A carrier for a waste gas-treating catalyst, comprising an inorganic refractory oxide containing a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄.
Claim 2
Dependent Claim
26 words
A carrier for a waste gas-treating catalyst, comprising an inorganic refractory oxide containing a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄.
Claim 3
Dependent Claim
30 words
A carrier according to claim 1, wherein the proportion of said composite oxide to said carrier is not less than 10% by weight, preferably not less than 20% by weight.
Claim 4
Dependent Claim
27 words
A carrier according to claim 2, wherein the carrier component has a composition of 20 to 90 mol% of TiO₂ and 80 to 10 mol% of ZrO₂.
Claim 5
Dependent Claim
45 words
A carrier according to claim 1, wherein said carrier is molded in a unitary structure possessing a plurality of through holes, having preferably an equivalent diameter in the range of 1.5 to 12 mm and an opening ratio in the range of 60 to 90%.
Claim 6
Independent Claim
53 words
A method for the production of a carrier for a waste gas-treating catalyst, which comprises heat-treating a substance containing a titanium compound and a zirconium compound at a temperature in the range of 600° to 1,000°C thereby giving rise to a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄.
Claim 7
Independent Claim
53 words
A method for the production of a carrier for a waste gas-treating catalyst, which comprises heat-treating a substance containing a titanium compound and a zirconium compound at a temperature in the range of 600° to 1,000°C thereby giving rise to a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄.
Claim 8
Dependent Claim
23 words
A method according to claim 5, wherein the proportion of said composite oxide to said carrier is not less than 10% by weight.
Claim 9
Dependent Claim
27 words
A method according to claim 6, wherein the carrier component has a composition of 20 to 90 mol% of TiO₂ and 80 to 10 mol% of ZrO₂.
Claim 10
Dependent Claim
56 words
A method according to claim 6, which comprises preparing a powder containing said composite oxide, and molding said powder in the shape of a unitary structure possessing a plurality of through holes, having preferably an equivalent diameter in the range of 1.5 to 12 mm and an opening ratio in the range of 60 to 90%.
Claim 11
Dependent Claim
26 words
A method according to claim 5 or 8, wherein said substance containing a titanium compound and a zirconium compound is formed by a process of coprecipitation.
Claim 12
Dependent Claim
78 words
A catalyst for the treatment of a waste gas, comprising a carrier formed of an inorganic refractory oxide containing a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄ and a catalytically active component deposited on said carrier and formed of at least one metal selected from the group consisting of manganese, iron, chromium, vanadium, molybdenum, cerium, cobalt, nickel, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium, and iridium or a compound of said metal.
Claim 13
Dependent Claim
78 words
A catalyst for the treatment of a waste gas, comprising a carrier formed of an inorganic refractory oxide containing a composite oxide of titanium and zirconium possessing a crystalline structure of ZrTiO₄ and a catalytically active component deposited on said carrier and formed of at least one metal selected from the group consisting of manganese, iron, chromium, vanadium, molybdenum, cerium, cobalt, nickel, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium, and iridium or a compound of said metal.
Claim 14
Dependent Claim
43 words
A catalyst according to claim 10, wherein the content of said catalytically active component is in the range of 30 to 0.01% by weight as metal or compound and that of said carrier component in the range of 70 to 99.99% by weight.
Claim 15
Dependent Claim
99 words
A catalyst according to claim 11, wherein the amount of at least one element selected from the group consisting of manganese, iron, chromium, vanadium, molybdenum, cerium, cobalt, nickel, tungsten, copper, and silver to be used is in the range of 0 to 30% by weight as compound and the amount of at least one element selected from the group consisting of gold, platinum, palladium, rhodium, ruthenium, and iridium is in the range of 0 to 10% by weight as metal, providing that the total amount of the two elements is in the range of 30 to 0.01% by weight.
Claim 16
Dependent Claim
45 words
A catalyst according to claim 10, wherein said carrier is molded in a unitary structure possessing a plurality of through holes, having preferably an equivalent diameter in the range of 1.5 to 12 mm and an opening ratio in the range of 60 to 90%.
Claim 17
Independent Claim
25 words
A method for the treatment of a waste gas in the presence of a catalyst according to any one of the claims 10 - 13.
Claim 18
Dependent Claim
38 words
A method according to claim 14, wherein the heating of said waste gas is performed at a temperature in the range of 150 to 800 °C at a spatial velocity in the range of 1,000 to 200,000 hr⁻¹.
Claim 19
Dependent Claim
15 words
A method according to claim 15, wherein said waste gas is an oxidizable substance-containing gas.
Claim 20
Dependent Claim
18 words
A method according to claim 15, wherein said waste gas is a reducible substance-containing gas, preferably nitrogen oxides.
Claim 21
Dependent Claim
35 words
A method according to claim 17, wherein said heat treatment of nitrogen oxides is performed in the presence of 0.5 to 3 parts by weight of ammonia per one part by volume of nitrogen oxides
References Cited (Backward Citations)
FR2194482A1
Cited
US4048112A
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FR2347326A1
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US4093543A
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EP0241647A2
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EP0244301A1
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