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Catalyst for clarifying exhaust gas 发明授权

2023-01-21 4710 5423K 0

专利信息

申请日期 2025-07-10 申请号 US10520823
公开(公告)号 US7205257B2 公开(公告)日 2007-04-17
公开国别 US 申请人省市代码 全国
申请人 Hirohisa Tanaka; Isao Tan; Mari Uenishi; Nobuhiko Kajita; Masashi Taniguchi; Yasunori Sato; Keiichi Narita; Noboru Sato
简介 To provide an exhaust gas purifying catalyst which can maintain the catalytic activity 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 noble metal, a perovskite-type composite oxide represented by the following general formula (3), and theta-alumina and/or alpha-alumina : [in-line-formulae]AB1-mNmO3  (3)[/in-line-formulae]wherein A represents at least one element selected from rare-earth elements and alkaline earth metals; B represents at least one element selected from Al and transition elements excluding rare-earth elements and noble metals; N represents a noble metal; and m represents an atomic ratio of N satisfying the following relation : 0


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