06150299 is referenced by 24 patents and cites 27 patents.

Mixed oxides excellent in thermal stability of specific surface area and in oxidation-reduction performance are provided on an industrial scale. Catalyst materials useful in exhaust gas purification are also provided. The invention is concerned with mixed oxides containing cerium, zirconium and sulfur, namely cerium- and zirconium-based mixed oxides having the composition: 50 to 79% by weight as cerium oxide, 20 to 49% by weight as zirconium oxide, and 1 to 5% by weight as sulfate (SO.sub.4). The invention also relates to a method of producing cerium- and zirconium-based mixed oxides which comprises mixing a cerous-alkali metal sulfate double salt with a zirconium ion-containing solution and then adding a base to the mixed solution to thereby cause formation of a precipitate. The invention further relates to catalyst materials for exhaust gas purification which comprise a mixed oxide containing cerium, zirconium and sulfur, namely a cerium- and zirconium-based mixed oxide containing sulfur in an amount of 0.5 to 5% by weight as sulfate (SO.sub.4).

Title
Cerium- and zirconium-based mixed oxide, method of producing same and catalyst material for exhaust gas purification
Application Number
9/267637
Publication Number
6150299
Application Date
March 15, 1999
Publication Date
November 21, 2000
Inventor
Kimio Ohuchi
Osaka
JP
Toshio Nakatani
Osaka
JP
Yoshichika Umemoto
Osaka
JP
Agent
Sughrue Mion Zinn Macpeak & Seas PLLC
Assignee
Daiichi Kigenso Kagaku Kogyo
JP
IPC
B01J 23/00
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