METAL OXIDE PARTICLE AND MANUFACTURING METHOD THEREOF AS WELL AS EXHAUST GAS PURIFYING CATALYST

Title:

METAL OXIDE PARTICLE AND MANUFACTURING METHOD THEREOF AS WELL AS EXHAUST GAS PURIFYING CATALYST

Document Type and Number:

Japanese Patent JP2007302530

Kind Code:

A

Abstract:

To provide a method for obtaining metal oxide particles by uniformly and rapidly mixing a metal salt solution and a basic solution, and further to provide metal oxide particles that are obtained by this method and an exhaust gas purifying catalyst that is manufactured by using the metal oxide particles.

The manufacturing method of metal oxide particles comprises (a) depositing a precursor of the metal oxide by mixing a metal salt solution and a basic solution, and (b) producing the metal oxide particles by drying and firing this precursor of the metal oxide, wherein the method comprises in the (a) step mixing at least one of the metal salt solution and the basic solution in the state of freezed particles and by depositing the precursor of the metal oxide by melting the freezed particles. The metal oxide particles are manufactured by this method and the exhaust gas purifying catalyst is obtained by supporting a noble metal on the metal oxide particles.

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Inventors:

MATSUBARA HIROYUKI
SOFUE YUICHI

Application Number:

JP2006134156A

Publication Date:

November 22, 2007

Filing Date:

May 12, 2006

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

C01F17/00; B01D53/94; B01J23/63; B01J37/03; F01N3/10

Attorney, Agent or Firm:

Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Nobuo Sekine

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