Catalyst for exhaust-gas purification and process for producing the same

Catalyst for exhaust-gas purification and process for producing the same

  • CN 101,400,441 B
  • Filed: 10/31/2006
  • Issued: 12/31/2014
  • Est. Priority Date: 11/01/2005
  • Status: Active Grant
First Claim
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1. an exhaust gas purification catalyst, it comprises:

  • Noble metal,1st compound, it contacts with described noble metal, load, plays the effect of chemically combined sticking agent, and suppresses the movement of this noble metal,2nd compound, it encapsulates described noble metal and described 1st compound, suppresses the movement of noble metal, suppresses to contact with each other with the 1st compound and the 1st compound cohesion that causes simultaneously;

    Wherein,The individuality of the 1st compound of this load noble metal or aggregation are included in the region that separated by described 2nd compound, and comprise the relation that there is Db <

    Da between the size Da of the compound particle of described noble metal and described 1st compound and the average fine pore Db of described 2nd compound.

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