Title:
CATALYST FOR PURIFYING EXHAUST GAS
Document Type and Number:
Japanese Patent JP3297825
Kind Code:
B2
Abstract:
PURPOSE: To obtain a ternary catalyst for an internal combustion engine high in durability.
CONSTITUTION: A catalyst carrier is coated with a mixture consisting of catalytically active components prepared by supporting platinum and/or palladium on cerium oxide stabilized by rare earth metal (excepting zirconium and cerium) and zirconium and refractory inorg. oxide based on activated alumina and, thereafter, rhodium and/or rhodium and a platinum group metal are further supported on the carrier to obtain the objective catalyst for purifying exhaust gas. Since platinum and/or palladium are preliminarily supported on stabilized cerium oxide, the sintering of platinum and palladium is suppressed and catalytic activity can be kept long.
Inventors:
Hironori Sato
Shinji Matsuura
Kenichi Taki
Hirohisa Tanaka
Ichiro Takahashi
Shinji Matsuura
Kenichi Taki
Hirohisa Tanaka
Ichiro Takahashi
Application Number:
JP9766394A
Publication Date:
July 02, 2002
Filing Date:
May 11, 1994
Export Citation:
Assignee:
Cataler Co., Ltd.
Daihatsu Motor Co., Ltd.
Daihatsu Motor Co., Ltd.
International Classes:
B01D53/86; B01D53/94; B01J23/56; B01J23/63; (IPC1-7): B01J23/63; B01D53/86; B01D53/94
Domestic Patent References:
| JP5237382A | ||||
| JP2293048A | ||||
| JP459049A |
Attorney, Agent or Firm:
Hiroshi Ohkawa