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公开(公告)号：EP1535662A1
公开(公告)日：2005-06-01
申请号：EP03741162.6
申请日：2003-07-03
发明人： TANAKA, Hirohisa, c/o SHIGA TECHNICAL CENTER , TAN, Isao, c/o SHIGA TECHNICAL CENTER , UENISHI, Mari, c/o SHIGA TECHNICAL CENTER , KAJITA, Nobuhiko, c/o SHIGA TECHNICAL CENTER , TANIGUCHI, Masashi, c/o SHIGA TECHNICAL CENTER
IPC分类号： B01J23/89 , B01J23/68 , B01J23/58 , B01J23/656 , B01D53/94
CPC分类号： B01D53/945 , B01J21/04 , B01J23/002 , B01J23/63 , B01J23/6562 , B01J23/688 , B01J23/894 , B01J23/8946 , B01J23/8986 , B01J37/0244 , B01J37/0248 , B01J37/08 , B01J2523/00 , C01G55/002 , C01P2002/34 , C01P2006/12 , C01P2006/60 , C01P2006/80 , Y02T10/22 , B01J2523/24 , B01J2523/36 , B01J2523/828 , B01J2523/842 , B01J2523/22 , B01J2523/25 , B01J2523/31 , B01J2523/3725 , B01J2523/822 , B01J2523/23 , B01J2523/3706 , B01J2523/18 , B01J2523/72 , B01J2523/821
摘要： To provide an exhaust gas purifying catalyst which can maintain the catalytic activity of Pt at a high level over a long time and can achieve satisfactory emission control performance, an exhaust gas purifying catalyst is prepared so as to contain a composite oxide having a perovskite structure represented by the general formula (1):
A 1-x A' x B 1-y-z B' y Pt z O 3 (1)
wherein A represents at least one element selected from rare-earth elements and essentially including one or more rare-earth elements each having a valence of 3 as the only valence; A' represents at least one element selected from alkaline earth metals and Ag; B represents at least one element selected from Fe, Mn, and Al; B' represents at least one element selected from transition elements excluding Pt, Fe, Mn, Co, and the rare-earth elements; and x, y, and z are atomic ratios satisfying the following relations: 0摘要翻译： 为了提供能够长时间高水平地维持Pt的催化剂活性并且可以实现令人满意的排放控制性能的排气净化催化剂，制备排气净化催化剂以包含具有所代表的钙钛矿结构的复合氧化物 由通式（1）表示：A1-xA'xB1-y-zB'yPtzO3（1）其中A表示至少一种选自稀土元素的元素，并且基本上包括一种或多种稀土元素，每种稀土元素的化合价为 3作为唯一的价格; A'表示选自碱土金属和Ag中的至少一种元素; B表示选自Fe，Mn和Al中的至少一种元素; B'表示选自不包括Pt，Fe，Mn，Co和稀土元素的过渡元素中的至少一种元素; 并且x，y和z是满足以下关系的原子比：0
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