(19)
(11) EP 1 806 179 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 158(3) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
19.12.2007 Bulletin 2007/51

(43) Date of publication:
11.07.2007 Bulletin 2007/28

(21) Application number: 04773552.7

(22) Date of filing: 24.09.2004
(51) International Patent Classification (IPC): 
B01J 23/63(2006.01)
B01D 53/94(2006.01)
 B01J 37/08(2006.01)
F01N 3/10(2006.01)
(86) International application number:
PCT/JP2004/014465
(87) International publication number:
WO 2006/033168 (30.03.2006 Gazette 2006/13)
(84) Designated Contracting States:
DE GB

(71) Applicant: HONDA MOTOR CO., LTD.
Tokyo 107-8556 (JP)

(72) Inventors:
  • MATSUO, Yuichi, c/o Honda R & D., Co., Ltd.
    Wako-shi, Saitama 3510193 (JP)
  • KIGUCHI, Kazunori, c/o Honda R & D., Co., Ltd.
    Wako-shi, Saitama 3510193 (JP)
  • SUZUKI, Norihiko, c/o Honda R & D., Co., Ltd.
    Wako-shi, Saitama 3510193 (JP)
  • FURUKAWA, Atsushi, c/o Honda R & D., Co., Ltd.
    Wako-shi, Saitama 3510193 (JP)

(74) Representative: Böhm, Brigitte et al
Weickmann & Weickmann Patentanwälte Postfach 860 820
81635 München
81635 München (DE)

   


(54) CATALYST FOR EXHAUST GAS PURIFICATION AND EXHAUST GAS PURIFICATION APPARATUS


(57) A catalyst for exhaust gas purification is provided that can not only efficiently and simultaneously purify nitrogen oxides, hydrocarbons and carbon monoxide in exhaust gas emitted from internal combustion engines such as those of automobiles even at lower temperatures, but also exhibits higher durability. The coexistence of a complex oxide that includes a rare earth element and palladium, a rare earth oxide, and a perovskite-type complex oxide that is expressed by the general formula LnAlO3, in which Ln is a rare earth element, may provide a catalyst that not only efficiently purifies the exhaust gas emitted from internal combustion engines such as those of automobiles even at lower temperatures, but also exhibits higher durability.