EP0275620A2
Expired / Lapsed
EP
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Method and catalyst for purification of gas
Assignee: Nippon Shokubai Co Ltd
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Filing: 1987-04-24
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Granted: —
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Expires: 2007-04-24
Abstract
Abstract A catalyst for the purification of a gas containing ozone or a component of offensive odour composed of: (A) a composite oxide of (a) titanium and (b) at least one element selected from the group consisting of Si, Zr, and P; and (B) at least one element selected from the group consisting of Mn, Fe, Co, Ni and Ag oxides and Pt, Pd and Rh metals.
Inventors
- 👤 Motonobu Kobayashi
- 👤 Kiichiro Mitsui
- 👤 Yoku Nanba
- 👤 Toshihide Kanzaki
- 👤 Kunio Sano
- 👤 Takehiko Suzuki
- 👤 Akira Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 20:15
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/187; B01J27/16; B01J27/18; A; A61; A61L; A61L9/00; A61L9/01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675; B01J23/00; B01J23/38; B01J23/40; B01J23/48; B01J23/50; B01J27/185; B01J27/1853; B01J27/1856; B01J35/00; B01J35/50; B01J35/56; B01J35/57; B01J35/60; B01J35/64; B01J35/657
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
134 words
A catalyst for the purification of a gas, comprising a component A composed of (a) an oxide containing titanium and (b) the oxide of at least one element selected from the group consisting of silicon, zirconium, and phosphorus; and a component B composed of at least one element selected from the group consisting of manganese, iron, cobalt, nickel, silver, platinum, palladium, and rhodium, wherein the amount of component B is a proportion in the range of 0 to 150 parts by weight as an oxide where the element selected is manganese, iron, cobalt, nickel or silver, or in the range of 0 to 10 parts by weight as the metal where the element selected is platinum, palladium or rhodium, the portions respectively being based on 100 parts by weight of component A as oxide.
Claim 2
Dependent Claim
134 words
A catalyst for the purification of a gas, comprising a component A composed of (a) an oxide containing titanium and (b) the oxide of at least one element selected from the group consisting of silicon, zirconium, and phosphorus; and a component B composed of at least one element selected from the group consisting of manganese, iron, cobalt, nickel, silver, platinum, palladium, and rhodium, wherein the amount of component B is a proportion in the range of 0 to 150 parts by weight as an oxide where the element selected is manganese, iron, cobalt, nickel or silver, or in the range of 0 to 10 parts by weight as the metal where the element selected is platinum, palladium or rhodium, the portions respectively being based on 100 parts by weight of component A as oxide.
Claim 3
Dependent Claim
32 words
A catalyst as claimed in Claim 1, characterised in that component A is at least one composite oxide selected from the group consisting of TiO₂-SiO₂, TiO₂-ZrO₂, TiO₂-P₂O₅, TiO₂-SiO₂-ZrO₂, TiO₂-SiO₂-P₂O₅, TiO₂-ZrO₂-P₂O₅, and TiO₂-SiO₂-ZrO₂-P₂O₅.
Claim 4
Dependent Claim
39 words
A catalyst as claimed in Claim 2 characterised in that component A comprises 20 to 95 mol% of TiO₂ and 5 to 80 mol% of at least one oxide selected from the group consisting of SiO₂, ZrO₂ and P₂O₅.
Claim 5
Dependent Claim
81 words
A catalyst as claimed in any preceding Claim characterised in that the amount of component B is a proportion in the range of 10 to 60 parts by weight as an oxide where the element selected is manganese, iron, cobalt, nickel or silver or in the range of 0.2 to 5 parts by weight as the metal where the element selected is platinum, palladium, or rhodium, the proportions respectively being based on 100 parts by weight of component A as oxide.
Claim 6
Dependent Claim
46 words
A catalyst as claimed in any of Claims 1 to 4, characterised in that component A is 30 to 90 mol% of TiO₂ and component B is 10 to 70 mol% of at least one oxide selected from the group consisting of SiO₂, ZrO₂, and P₂O₅.
Claim 7
Dependent Claim
20 words
A catalyst as claimed in any preceding claim, characterised in that component B is an oxide or oxides of manganese.
Claim 8
Dependent Claim
19 words
A catalyst as claimed in Claim 6 characterised in that the manganese oxide is a β type manganese oxide.
Claim 9
Dependent Claim
22 words
A catalyst as claimed in any preceding claim characterised in that component A has a surface area of not less than 30m²/g.
Claim 10
Dependent Claim
23 words
A catalyst as claimed in any preceding claim characterised in that component A includes 5 to 90% by weight substituted with activated carbon.
Claim 11
Dependent Claim
57 words
A catalyst as claimed in any preceding claim characterised in that the catalyst is in the form of honey combs having a nominal diameter of individual penetration pore in the range of 0.7 to 0.3mm, a wall thickness of cells in the range of 0.2 to 0.5 mm, and an aperture ratio of not less than 50%.
Claim 12
Independent Claim
41 words
A method for the purification of an ozone-containing gas, which comprises passing the ozone-containing gas through a bed of catalyst characterised in that the catalyst is as claimed in any preceding claim, thereby effecting decomposition of the ozone in the gas.
Claim 13
Independent Claim
60 words
A method for the purification of a gas containing a component of offensive odour, characterised by combining the gas with ozone and passing the resultant mixed gas through a bed of a catalyst as claimed in any of Claims 1 to 10 thereby effecting removal of the component of offensive odour by the ozone and subsequent decomposition of the ozone.
Claim 14
Independent Claim
52 words
A method for the deodourisation of a gas containing a component of offensive odour by means of introducing ozone into the gas thereby decomposing and removing the component of offensive odour, characterised by setting up a catalyst bed in a path for the gas and making the introduction of the ozone intermittently.
Claim 15
Independent Claim
52 words
A method for the deodourisation of a gas containing a component of offensive odour by means of introducing ozone into the gas thereby decomposing and removing the component of offensive odour, characterised by setting up a catalyst bed in a path for the gas and making the introduction of the ozone intermittently.
Claim 16
Dependent Claim
27 words
A method as claimed in Claim 13 characterised in that the catalyst bed is formed by packing a catalyst as claimed in any Claims 1 to 10.
References Cited (Backward Citations)
No citation records indexed.
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