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특허 상세정보

Catalyst for purifying exhaust gases and process for producing the same

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B01J-023/10    B01J-023/38   
미국특허분류(USC) 502/304 ; 502/325 ; 502/339 ; 502/349
출원번호 US-0569396 (1995-12-08)
우선권정보 JP-0113789 (1995-04-13)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
인용정보 피인용 횟수 : 39  인용 특허 : 2
초록

A catalyst for purifying exhaust gases includes a porous support; a cerium oxide or a solid solution of a cerium oxide and a zirconium oxide in a state of mutual solid solution, loaded on the porous support; and a noble metal element loaded on the porous support. The cerium oxide or the solid solution has an average particle diameter of from 5 to 100 nm. The cerium oxide is present in the solid solution in an amount of from 0.2 to 4.0 by molar ratio with respect to the zirconium oxide therein. The catalyst can be prepared by: coating and calcinating on a...

대표
청구항

[ What is claimed is:] [1.] A catalyst for purifying exhaust gases, comprising:a porous support;a cerium oxide loaded on said porous support, and having an average secondary particle diameter of from 5 to 100 nm, said average secondary particle diameter being large enough to prevent most of the cerium oxide from entering pores of said porous support, and wherein 50% or more by weight of the particles have an average secondary particle diameter of 100 nm or less; anda noble metal element loaded on said porous support.

이 특허를 인용한 특허 피인용횟수: 39

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