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특허 상세정보

Stabilized and doubly promoted platinum group metal catalysts for emission control and method of making same

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B01J-021/04    B01J-023/10    B01J-023/58   
미국특허분류(USC) 502/303 ; 502/304 ; 423/2135
출원번호 US-0629309 (1984-07-10)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 25  인용 특허 : 9
초록

Alumina supported platinum-group metal catalysts exhibit exceptionally good performance and durability when the support is sequentially modified to include support stabilization by lanthana or lanthana-rich rare earth oxides, double promotion by ceria and alkali metal oxides, especially ceria along with lithia, and optionally nickel (oxide) as a base metal catalytic ingredient. For a pelleted Rh containing catalyst to exhibit such an outstanding performance at least part of the Rh component is added separately from any other Pt group metals.

대표
청구항

A catalyst suitable for use as a catalyst for auto emission control comprising an alumina support with components deposited thereon consisting essentially of lanthana as a stabilizer in an amount of about 1 to 10% by weight expressed as La2O3 which is either in the form of lanthana only or in the form of lanthana-rich rare earth oxides where the La2O3 is at least 50% by weight of the total rare earth oxides, 1-20% by weight of ceria as a promoter, at least 0.5 to about 5% by weight of an alkali metal oxide as a promoter, and a catalytically-effective amo...

이 특허를 인용한 특허 피인용횟수: 25

  1. Kim Gwan (Olney MD). Add-on hydrogen sulfide trap. USP1990014895824.
  2. Ernest Michael V. (Baltimore MD). Auto exhaust catalyst composition having low H2S emissions and method of making the catalyst. USP1990124977129.
  3. Rieck Jeffrey S. (Jessup MD) Suarez Wilson (Columbia MD) Kubsh Joseph E. (Silver Spring MD). Catalyst and metal ferrites for reduction of hydrogen sulfide emissions from automobile exhaust. USP1990044916105.
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  7. Wu Joseph H. Z. ; Sung Shiang ; Hu Zhicheng ; Steger John J.. Catalyst composition containing oxygen storage components. USP1999045898014.
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  10. Matsumoto Shinichi (Aichi JPX) Miyoshi Naoto (Nagoya JPX) Sato Masayasu (Osaka JPX). Catalyst for the purification of exhaust gases. USP1989024808564.
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  13. Kim Gwan (Olney MD) Ernest Michael V. (Baltimore MD) Plecha Stanislaw (Baltimore MD). Catalysts for controlling auto exhaust emissions including hydrocarbon, carbon monoxide, nitrogen oxides and hydrogen su. USP1988104780447.
  14. Chen Shau-Lin F. ; Rabinowitz Harold N. ; Kim Chong. Catalytic material having improved conversion performance. USP2000086110862.
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  21. Hu Zhicheng (Edison NJ) Wan Chung-Zong (Somerset NJ) Lui Yiu-Kwan (Parlin NJ) Dettling Joseph C. (Howell NJ). Layered catalyst composite. USP1997015597771.
  22. Sung Shiang. Layered catalyst composite. USP1999095948723.
  23. Hu Zhicheng ; Heck Ronald M. ; Rabinowitz Harold N.. Method for using a close coupled catalyst. USP2001076254842.
  24. Kahlert, Bernhard. NO2 slip catalyst. USP2015129205378.
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