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1. CN102711983 - Complex oxide, method for producing same and exhaust gas purifying catalyst

官庁 中華人民共和国
出願番号 201080062336.0
出願日 25.11.2010
公開番号 102711983
公開日 03.10.2012
特許番号 102711983
特許付与日 22.04.2015
公報種別 B
IPC
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
B01J 33/00
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
33触媒の保護,例.被覆によるもの
F01N 3/10
F機械工学;照明;加熱;武器;爆破
01機械または機関一般;機関設備一般;蒸気機関
N機械または機関のためのガス流消音器または排気装置一般;内燃機関用ガス流消音器または排気装置
3排気の清浄,無害化または他の処理をする手段をもつ排気もしくは消音装置
08無害にするためのもの
10排気の有害成分を熱または触媒で変換することによるもの
CPC
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
B01D 2255/9207
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
90Physical characteristics of catalysts
92Dimensions
9207Specific surface
出願人 Anan Kasei Co., Ltd.
発明者 Ohtake Naotaka
Yokota Kazuhiko
代理人 kong jing li bingai
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
(ZH) 复合氧化物、其制备方法和废气净化用催化剂
要約
(EN)
Disclosed are: a silicon-containing cerium complex oxide which has excellent heat resistance and excellent reduction rate, and is capable of maintaining high specific surface area even in cases where the silicon-containing cerium complex oxide is used in a high-temperature environment; a method for producing the silicon-containing cerium complex oxide; and an exhaust gas purifying catalyst which utilizes the silicon-containing cerium complex oxide. Specifically disclosed is a complex oxide which contains 2-20% by mass of silicon in terms of SiO2 and has a specific surface area of not less than 40 m2/g as determined by a BET method after being fired at 1000 DEG C for 5 hours. The complex oxide has a reduction rate of not less than 30% as calculated from the results of a temperature-programmed reduction measurement from 50 DEG C to 900 DEG C after being fired at 1000 DEG C for 5 hours, and is particularly suitable as a promoter for an exhaust gas purifying catalyst that is used for automobiles and the like.

(ZH)

提供即使在高温环境下使用时也能维持高的比表面积、具有优异的耐热性和优异的还原率的含硅的铈复合氧化物、其制备方法和利用该复合氧化物的废气净化用催化剂。本发明的复合氧化物含有按SiO2换算为2~20质量%的硅,具有如下特性:在1000℃下煅烧5小时后用BET法测量的比表面积为40m2/g以上,且在1000℃下煅烧5小时后由50℃至900℃的升温还原测定结果算出的还原率为30%以上,特别适合用作汽车等中使用的废气净化用催化剂的助催化剂。