PRODUCTION METHOD FOR EXHAUST GAS-PURIFYING CATALYST AND MOTOR VEHICLE

Title:

PRODUCTION METHOD FOR EXHAUST GAS-PURIFYING CATALYST AND MOTOR VEHICLE

Document Type and Number:

WIPO Patent Application WO/2012/077510

Kind Code:

A1

Abstract:

This production method for an exhaust gas-purifying catalyst includes (a) a step of preparing a metal oxide support containing zirconium, (b) a step of preparing a solution containing rhodium, (c) a step of obtaining a solution having a pH adjusted to 3.0 to 7.5 by adding the metal oxide support prepared in the step (a), and ammonium carbonate, ammonium hydrogencarbonate, or aqueous ammonia, to the solution prepared in the step (b). The present invention provides a method capable of producing an exhaust gas-purifying catalyst in which rhodium is supported with a high degree of dispersion and a small grain size to a metal oxide support containing zirconium.

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Inventors:

ITOU YUTAKA (JP)
MOROZUMI NAOHIRO (JP)

Application Number:

PCT/JP2011/077167

Publication Date:

June 14, 2012

Filing Date:

November 25, 2011

Export Citation:

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Assignee:

YAMAHA MOTOR CO LTD (JP)
ITOU YUTAKA (JP)
MOROZUMI NAOHIRO (JP)

International Classes:

B01D53/94; B01J23/56; B01J23/63; B01J37/02; F01N3/20

Foreign References:

JP2002191989A	2002-07-10
JP2005313028A	2005-11-10
JP2006068665A	2006-03-16
JPH01115458A	1989-05-08
JP2006320863A	2006-11-30
JP2008284553A	2008-11-27

Other References: