Title:
EXHAUST GAS TREATING CATALYST FOR PURIFYING EXHAUST GAS CONTAINING SILICON COMPOUND
Document Type and Number:
WIPO Patent Application WO/2014/156951
Kind Code:
A1
Abstract:
The present invention is an exhaust gas purifying catalyst for purifying an exhaust gas containing a silicon compound, which comprises a supporting body and a catalyst layer that is formed on the supporting body and is obtained by loading an inorganic oxide carrier with a noble metal. This exhaust gas purifying catalyst is characterized in that an overcoat layer that is formed of zirconia and/or titania is provided on the catalyst layer. In order to make both initial activity and durability good, it is preferable that the overcoat layer is formed to have a thickness of 13-70 μm. According to the present invention, the activity can be maintained for a long period of time in the process for purifying an exhaust gas that contains silicon.
Inventors:
SHIRAISHI HIROKAZU (JP)
KIKUHARA SHUNJI (JP)
MURAYAMA KEIJI (JP)
UNNO TETSUYA (JP)
AMANO TAKASHI (JP)
KIKUHARA SHUNJI (JP)
MURAYAMA KEIJI (JP)
UNNO TETSUYA (JP)
AMANO TAKASHI (JP)
Application Number:
PCT/JP2014/057753
Publication Date:
October 02, 2014
Filing Date:
March 20, 2014
Export Citation:
Assignee:
TANAKA PRECIOUS METAL IND (JP)
AISIN SEIKI (JP)
AISIN SEIKI (JP)
International Classes:
B01J23/42; B01D53/94; B01J33/00
Foreign References:
| JP2012223665A | 2012-11-15 | |||
| JP2004066126A | 2004-03-04 | |||
| JPH03254836A | 1991-11-13 | |||
| JPH10148306A | 1998-06-02 | |||
| JPS59147623A | 1984-08-24 | |||
| JP4319222B2 | 2009-08-26 |
Other References:
See also references of EP 2979754A4
Attorney, Agent or Firm:
TANAKA AND OKAZAKI (JP)
Patent business corporation Tanaka and Okazaki and associates (JP)
Patent business corporation Tanaka and Okazaki and associates (JP)
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