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1. US20120316059 - Complex oxide, method for producing same and exhaust gas purifying catalyst

官庁 アメリカ合衆国
出願番号 13511846
出願日 25.11.2010
公開番号 20120316059
公開日 13.12.2012
特許番号 08921255
特許付与日 30.12.2014
公報種別 B2
IPC
B01J 21/00
B処理操作;運輸
01物理的または化学的方法または装置一般
J化学的または物理的方法,例.触媒またはコロイド化学;それらの関連装置
21マグネシウム,ほう素,アルミニウム,炭素,けい素,チタン,ジルコニウムまたはハフニウム,その酸化物または水酸化物からなる触媒
B01J 23/00
B処理操作;運輸
01物理的または化学的方法または装置一般
J化学的または物理的方法,例.触媒またはコロイド化学;それらの関連装置
23グループB01J21/00に分類されない,金属または金属酸化物または水酸化物からなる触媒
B01J 23/10
B処理操作;運輸
01物理的または化学的方法または装置一般
J化学的または物理的方法,例.触媒またはコロイド化学;それらの関連装置
23グループB01J21/00に分類されない,金属または金属酸化物または水酸化物からなる触媒
10希土類に関するもの
C01B 33/20
C化学;冶金
01無機化学
B非金属元素;その化合物
33けい素;その化合物
20けい酸塩
C01B 13/00
C化学;冶金
01無機化学
B非金属元素;その化合物
13酸素;オゾン;酸化物または水酸化物一般
C01C 1/00
C化学;冶金
01無機化学
Cアンモニア;シアン;それらの化合物
1アンモニア;その化合物
CPC
B01J 23/10
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
10of rare earths
B01D 53/945
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
9445Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
945characterised by a specific catalyst
B01D 2255/2065
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
20Metals or compounds thereof
206Rare earth metals
2065Cerium
B01D 2255/30
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
30Silica
B01D 2255/40
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
40Mixed oxides
B01D 2255/908
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
90Physical characteristics of catalysts
908O2-storage component incorporated in the catalyst
出願人 Ohtake Naotaka
Anan Kasei Co., Ltd.
Yokota Kazuhiko
発明者 Ohtake Naotaka
Yokota Kazuhiko
代理人 Sughrue Mion, PLLC
優先権情報 2009-267893 25.11.2009 JP
発明の名称
(EN) Complex oxide, method for producing same and exhaust gas purifying catalyst
要約
(EN)

Disclosed are a silicon-containing cerium composite oxide which is capable of maintaining a large specific surface area even used in a high temperature environment, and which has excellent heat resistance and reducibility, as well as a method for producing the composite oxide and a catalyst for exhaust gas purification employing the composite oxide. The composite oxide contains 2 to 20 mass % silicon in terms of SiO2, has properties of exhibiting a specific surface area of not less than 40 m2/g as measured by the BET method after calcination at 1000° C. for 5 hours, and a reducibility of not lower than 30% as calculated from measurement of temperature-programmed reduction from 50° C. to 900° C. after calcination at 1000° C. for 5 hours, and is suitable for a co-catalyst for a catalyst for exhaust gas purification.