04587231 is referenced by 50 patents and cites 5 patents.

A method of producing a monolithic three-way catalyst for the purification of exhaust gases of internal combustion engines. First, a mixed oxide coating is provided to a monolithic carrier by treating the carrier with a coating slip in which an active alumina powder containing cerium in oxide form is dispersed together with a ceria powder and then baking the treated carrier. Next, Pt, Rh and/or Pd are deposited on the oxide coating by a known thermal decomposition process. The addition of the ceria powder to the coating slip is effective in enhancing the CO, HC and NO.sub.x conversions and durability of the produced catalyst at high temperatures. Preferably the content of Ce in the active alumina powder is 1-5 wt %, and, in the coating after baking, Ce of the ceria powder amounts to 5-50 wt % of the coating. Optionally a zirconia powder too may be added to the coating slip such that Zr of the zirconia powder amounts to 1-10 wt % of the coating.

Title
Method of producing monolithic catalyst for purification of exhaust gas
Application Number
6/671714
Publication Number
4587231
Application Date
November 15, 1984
Publication Date
May 6, 1986
Inventor
Koji Masuda
Yokosuka
JP
Junichi Mine
Yokohama
JP
Yoshiyuki Eto
Yokohama
JP
Keiichi Sawamura
Yokohama
JP
Agent
Schwartz Jeffery Schwaab Mack Blumenthal & Evans
Assignee
Nissan Motor
JP
IPC
B01J 23/10
B01J 21/06
B01J 21/04
View Original Source