EP0613714A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catalyst and process for purifying exhaust gases
Assignee: Cataler Corp
•
Filing: 1994-01-10
•
Granted: —
•
Expires: 2014-01-10
Abstract
Abstract A catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.
Inventors
- 👤 Naoto Miyoshi
- 👤 Shinichi Matsumoto
- 👤 Tsuneyuki Tanizawa
- 👤 Satoshi Iguchi
- 👤 Toshiaki Tanaka
- 👤 Shinichi Takeshima
- 👤 Takaaki Kanazawa
- 👤 Takahiro Hayashi
- 👤 Motohisa C/O K.K. Toyota Chuo Kenkyusho Saiki
- 👤 Kazuhiko C/O K.K. Toyota Chuo Kenkyusho Dohmae
- 👤 Kiyoshi C/O K.K. Toyota Chuo Kenkyusho Yamazaki
- 👤 Tadashi C/O K.K. Toyota Chuo Kenkyusho Suzuki
- 👤 Koichi Kasahaha
- 👤 Syuji Tateishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 19:43
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9422; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J23/63; B01J23/64; B01J23/652; B01J23/6522; B01J23/656; B01J23/6562; B01J23/70; B01J23/89; B01J23/8933; B01J23/894; B01J37/00; B01J37/02; B01J37/024; B01J37/0242; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1021; B01D2255/1023; B01D2255/20; B01D2255/202; B01D2255/204; B01D2255/2042; B01D2255/206; B01D2255/2063; B01D2255/2065; B01D2255/207; B01D2255/2073; B01D2255/20738; B01D2255/20746; B01D2255/20753; B01D2255/90; B01D2255/91; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
58 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least two ingredients selected from the group consisting of rare-earth elements including La is further loaded on said porous support.
Claim 2
Dependent Claim
83 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least one first ingredient selected from the group consisting of rare-earth elements including La is further loaded on said porous support; and at least one second ingredient selected from the group consisting of Fe, Ni, Co and Mn is further loaded on said porous support.
Claim 3
Dependent Claim
56 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least two ingredients selected from the group consisting of alkali metals is further loaded on said porous support.
Claim 4
Dependent Claim
80 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least one first ingredient selected from the group consisting of alkali metals is further loaded on said porous support; and at least one second ingredient selected from the group consisting of rare-earth elements including La is further loaded on said porous support.
Claim 5
Dependent Claim
81 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least one first ingredient selected from the group consisting of alkali metals is further loaded on said porous support; and at least one second ingredient selected from the group consisting of Fe, Ni, Co and Mn is further loaded on said porous support.
Claim 6
Dependent Claim
56 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least two ingredients selected from the group consisting of alkaline-earth metals are further loaded on said porous support.
Claim 7
Dependent Claim
80 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: at least one first ingredient selected from the group consisting of alkaline-earth metals is further loaded on said porous support; and at least one second ingredient selected from the group consisting of rare-earth elements including La is further loaded on said porous support.
Claim 8
Dependent Claim
50 words
A catalyst for purifying exhaust gases, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said catalyst is characterized in that: Ba, Li, La, Ce and Zr are further loaded on said porous support.
Claim 9
Dependent Claim
112 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least two ingredients selected from the group consisting of rare-earth elements including La, and loaded on said porous support.
Claim 10
Dependent Claim
136 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least one first ingredient selected from the group consisting of rare-earth elements including La, and loaded on said porous support; and at least one second ingredient selected from the group consisting of Fe, Ni, Co and Mn, and loaded on said porous support.
Claim 11
Dependent Claim
110 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least two ingredients selected from the group consisting of alkali metals, and loaded on said porous support.
Claim 12
Dependent Claim
133 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least one first ingredient selected from the group consisting of alkali metals, and loaded on said porous support; and at least one second ingredient selected from the group consisting of rare-earth elements including La, and loaded on said porous support.
Claim 13
Dependent Claim
134 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least one first ingredient selected from the group consisting of alkali metals, and loaded on said porous support; and at least one second ingredient selected from the group consisting of Fe, Ni, Co and Mn, and loaded on said porous support.
Claim 14
Dependent Claim
110 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least two ingredients selected from the group consisting of alkaline-earth metals, and loaded on said porous support.
Claim 15
Dependent Claim
132 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: at least one first ingredient selected from the group consisting of alkaline-earth metals, and loaded on said porous support; and at least one second ingredient selected from the group consisting of rare-earth elements including La, and loaded on said porous support.
Claim 16
Dependent Claim
103 words
A process for simultaneously purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases in oxygen-rich atmospheres, thereby purifying the exhaust gases, said process comprising the step of: bringing oxygen-rich exhaust gases, whose oxygen concentrations are the stoichiometric point or more required for oxidizing the components to be oxidized therein, into contact with a catalyst: said catalyst, comprising: a porous support; and at least one catalyst ingredient selected from the group consisting of Pt and Pd, and loaded on said porous support; said process is characterized in that: said catalyst further comprises: Ba, Li, La, Ce and Zr loaded on said porous support.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.