CATALYST FOR EXHAUST GAS PURIFICATION

Title:

CATALYST FOR EXHAUST GAS PURIFICATION

Document Type and Number:

WIPO Patent Application WO/2004/004896

Kind Code:

A1

Abstract:

A catalyst for exhaust gas purification which can retain the catalytic activity of rhodium on a high level over long and can realize excellent exhaust gas purification performance. The catalyst is prepared so as to contain a composite oxide of the perovskite structure represented by the general formula (1): ABRhO₃ (1) wherein A represents at least one element selected among rare earth elements certainly including one or more rare earth elements having a valance of 3 as the only valence and optionally including cerium and/or praseodymium; and B represents at least one element selected among aluminum and the transition elements excluding cobalt, rhodium, and the rare earth elements.

Inventors:

TANAKA HIROHISA (JP)
TAN ISAO (JP)
UENISHI MARI (JP)
KAJITA NOBUHIKO (JP)
TANIGUCHI MASASHI (JP)

Application Number:

PCT/JP2003/008436

Publication Date:

January 15, 2004

Filing Date:

July 03, 2003

Export Citation:

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Assignee:

DAIHATSU MOTOR CO LTD (JP)
TANAKA HIROHISA (JP)
TAN ISAO (JP)
UENISHI MARI (JP)
KAJITA NOBUHIKO (JP)
TANIGUCHI MASASHI (JP)

International Classes:

B01D53/86; B01D53/94; B01J21/04; B01J21/06; B01J23/00; B01J23/63; B01J23/656; B01J23/68; B01J23/89; B01J37/02; B01J37/03; B01J37/08; C01G55/00; B01J35/00; (IPC1-7): B01J23/89; B01J23/63; B01D53/94

Foreign References:

JPS63302950A	1988-12-09
JPH03186346A	1991-08-14
JPH05509033A	1993-12-16
US20010053467A1	2001-12-20
JPH1157471A	1999-03-02
JPS5191890A	1976-08-12

Other References:

NOLVEN GUILHAUME ET AL.: "Three-way catalytic activity and oxygen storage capacity of perovskite LaMn0.976Rh0.024P3+0", JOURNAL OF CATALYSIST, vol. 165, no. 2, 1997, pages 197 - 204, XP004459638
See also references of EP 1533030A4

Attorney, Agent or Firm:

Okamoto, Hiroyuki c/o Association, Patent And AI. OF. (TRADE MARK ATTORNEYS Sun Mullion NBF Tower, 21st Floor, 6-12, Minamihommachi 2-chome, Chuo-k, Osaka-shi Osaka, JP)

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