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Title:
CATALYST FOR EXHAUST GAS CLEANING
Document Type and Number:
WIPO Patent Application WO/2005/039759
Kind Code:
A1
Abstract:
A catalyst for exhaust gas cleaning which has cleaning ability even at high temperatures. This catalyst comprises a crystalline composite zirconium oxide and, deposited thereon, an alkali metal and a noble metal, wherein part of the zirconium of the composite zirconium oxide has been displaced by at least one element selected from the group consisting of alkaline earth metals, rare earth metals, and Group IIIB elements and the elongation of the crystal lattice due to this element displacement is an approximately theoretical value.

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Inventors:
TAKESHIMA SHINICHI (JP)
YAMASHITA TETSUYA (JP)
TANAKA TOSHIAKI (JP)
Application Number:
PCT/JP2004/015575
Publication Date:
May 06, 2005
Filing Date:
October 14, 2004
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
TAKESHIMA SHINICHI (JP)
YAMASHITA TETSUYA (JP)
TANAKA TOSHIAKI (JP)
International Classes:
F01N3/10; B01D53/94; B01J23/58; B01J23/63; B01J23/00; (IPC1-7): B01J23/58; B01D53/94; B01J23/62; F01N3/10
Domestic Patent References:
WO2002094716A12002-11-28
Foreign References:
JP2002079097A2002-03-19
JP2001170487A2001-06-26
JPH02175602A1990-07-06
JPH06178937A1994-06-28
JPH0899034A1996-04-16
JPH08281106A1996-10-29
JPH0924274A1997-01-28
JP2004262702A2004-09-24
EP1452483A12004-09-01
EP1479651A12004-11-24
JPH02175602A1990-07-06
EP0955267A11999-11-10
Other References:
YENTEKAKIS I.V. ET AL.: "Promotion by sodium in emission control catalysis: a kinetic and spectroscopic study of the Pd-catalyzed reduction of NO by propene", JOURNAL OF CATALYSIS, vol. 176, 15 May 1998 (1998-05-15), pages 82 - 92, XP004447397
See also references of EP 1681096A4
Attorney, Agent or Firm:
Aoki, Atsushi (Ishida & Associates Toranomon 37 Mori Bldg., 5-1, Toranomon 3-chom, Minato-ku Aichi 23, JP)
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