The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2005
Filed:
Aug. 25, 2003
Mei Cai, Bloomfield Hills, MI (US);
Lee Lizhong Feng, Troy, MI (US);
Martin S. Ruthkosky, Sterling Heights, MI (US);
Jerry Dale Rogers, Rochester Hills, MI (US);
Mei Cai, Bloomfield Hills, MI (US);
Lee Lizhong Feng, Troy, MI (US);
Martin S. Ruthkosky, Sterling Heights, MI (US);
Jerry Dale Rogers, Rochester Hills, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The present invention provides a method of making a noble metal catalyst, where the noble metal is distributed on the surface of special composite carrier particles. Nanometer sized oxide particles are first dry coated by an impact mixing process on the surface of larger alumina particles. In general, this dry coating process coats the nanometer sized particles on the surface of the alumina particles. A suitable solution of noble metal(s) compound is then soaked on the surface of the composite carrier particles. Ultimately, the noble metal compound is decomposed by calcining and noble metal particles dispersed with large effective surface area on the composite carrier particles. The resultant catalyst structure improves catalyst performance while making efficient and effective use of the expensive noble metal.