[특허]Catalyst composition containing an intimately mixed oxide of cerium and praseodymium

[미국특허] Catalyst composition containing an intimately mixed oxide of cerium and praseodymium 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01J-023/10 B01J-023/40 B01J-023/42
출원번호	US-0824425 (1997-03-26)
발명자 / 주소	Wu Joseph Hui-Zhao Wan Chung-Zong
출원인 / 주소	Engelhard Corporation
인용정보	피인용 횟수 : 30 인용 특허 : 6

초록 ▼

A catalyst suitable for the treatment of automotive engine exhaust exhibiting enhanced oxygen storage capacity. The catalyst composition contains, in addition to a catalytic material such as one or more of platinum, rhodium and palladium dispersed on an activated alumina support, an oxygen storage component ("OSC") which is an intimately mixed oxide of ceria and praseodymia having a Pr:Ce atomic ratio in the range of about 2:100 to 100:100 and optionally containing one or more other rare earth metal oxides. The OSC is segregated from the catalytic material and may optionally have dispersed thereon a limited amount of a second catalytic metal component, such as platinum, rhodium and/or palladium. The intimately mixed oxide may be formed by co-precipitation by impregnation of bulk ceria particles with a praseodymium precursor, or any other method to form an intimately mixed oxide. The OSC may comprise at least about 5% by weight of the combined weight of the OSC and the catalytic component.

대표청구항 ▼

[ What is claimed is:] [1.] A catalyst member comprising a substrate on which is disposed (a) a catalytic material comprising a refractory support material having a catalytically effective amount of a first catalytic metal component dispersed thereon, and (b) an oxygen storage component segregated from the refractory support material having the first catalytic metal component thereon; the oxygen storage component comprising an intimately mixed oxide of cerium and praseodymium having an atomic ratio of Pr:Ce in the range of about 2:100 to 100:100 and having a catalytically effective amount of a platinum component dispersed thereon.

이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

Wan Chung-Zong (Somerset NJ) Dettling Joseph C. (Howell NJ), Aluminum-stabilized ceria catalyst compositions, and methods of making the same.
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Shelef Mordecai (Bloomfield Village MI) Usmen Rengin K. (Troy MI) Graham George W. (Ann Arbor MI) Watkins William L. H. (Toledo OH) McCabe Robert W. (Lathrup Village MI), Automotive catalysts with improved oxygen storage and metal dispersion.
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Wan Chung-Zong (Somerset NJ), Catalyst composition containing segregated platinum and rhodium components.
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Ozawa Masakuni (Kasugai JPX) Kimura Mareo (Nagoya JPX) Isogai Akio (Nagoya JPX) Matsumoto Shinichi (Aichi JPX) Miyoshi Naoto (Nagoya JPX), Catalyst for purification of exhaust gases.
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Sekiba Toru (Yokohama JPX) Okada Akihide (Yokohama JPX) Uchikawa Fumihiro (Miura JPX), Catalysts for the purification of exhaust gas.
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Dettling Joseph C. (Howell NJ), High performance thermally stable catalyst.
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Yokota, Kazuhiko; Ohtake, Naotaka, High specific surface area mixed oxide of cerium and of another rare earth, preparation method and use in catalysis.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Catalyst composition containing an intimately mixed oxide of cerium and praseodymium 원문보기