[특허]Catalyst compositions and methods of making the same

Catalyst compositions and methods of making the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01J-021/04
출원번호	US-0879684 (1986-06-27)
발명자 / 주소	Wan Chung-Zong (Somerset NJ) Dettling Joseph C. (Howell NJ)
출원인 / 주소	Engelhard Corporation (Menlo Park NJ 02)
인용정보	피인용 횟수 : 74 인용 특허 : 0

초록 ▼

A method of making a catalyst composition comprising an activated alumina coating stabilized against thermal degradation includes applying a coating of alumina having one or more platinum group metal catalytic components dispersed thereon onto a carrier substrate and calcining the coating. The calcined coating is then impregnated with a solution of a thermal stabilizer-precursor and calcined again to provide a thermal stabilizer in the alumina. Bulk ceria, optionally an aluminum-stabilized bulk ceria, may also be added to the composition, preferably at specified minimum levels, including a high purity bulk ceria on which one or more non-rhodium platinum group metal catalytic components, e.g., platinum, optionally, are dispersed. A separate aspect of the invention provides for a method of making a catalyst composition including dispersing one or more platinum group metal catalytic components on an activated alumina and calcining the combined alumina and platinum group metal catalytic components. The steps are carried out under limited acidification conditions whereby at least minimum dispersions of the platinum group metal catalytic components are attained. The invention also provides for catalyst compositions resulting from either or both the foregoing methods.

대표청구항 ▼

A method of making a catalyst composition comprising a platinum group metal catalytic component and an activated alumina stabilized against thermal degradation, the method comprising: (a) dispersing one or more platinum group metal catalytic components on an activated alumina; (b) combining a solid, particulate ceria with the activated alumina to form an alumina-ceria mixture; (c) applying a coating of the alumina-ceria mixture to a carrier substrate; (d) calcining the substrate coated with the alumina-ceria mixture to provide thereon an activated alumina-containing calcined coating; (e) after step (d), impregnating the calcined coating on the carrier with a solution of a stabilizer-precursor which upon calcination yields a stabilizer chosen from the group consisting of rare earth metal oxides, alkaline earth metal oxides, titania, zirconia, hafnia, silicon dioxide and mixtures thereof; and (f) calcining the stabilizer-precursor impregnated coating. A catalyst prepared by a process comprising the steps of: providing a carrier substrate; applying and dispersing upon said carrier substrate particles of an activated alumina having one or more platinum group metal catalytic components dispersed thereon, calcining said alumina and dispersed catalytic components subsequent to their application to said carrier substrate to provide a calcined coating on the carrier substrate, and subsequently stabilizing said calcined coating by (a) impregnating the calcined coating with a solution of a stabilizer-precursor, and (b) calcining the stabilizer-precursor impregnated coating.

이 특허를 인용한 특허 (74)

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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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