Title:
PROCESS FOR PRODUCING COMPOSITE METAL OXIDE
Document Type and Number:
WIPO Patent Application WO/2008/010585
Kind Code:
A1
Abstract:
It is a process for producing a composite metal oxide of an acid metal oxide with
a basic metal oxide comprising the steps of: (a) providing an aqueous solution
containing colloidal particles of an acid metal oxide and a salt of a basic metal;
(b) obtaining a precursor of a composite metal oxide by adjusting the pH of this
aqueous solution to a value such that a portion of the basic metal dissolves in
the aqueous solution, the residual portion of the basic metal is deposited to
have a positive zeta potential, and the colloidal particles of the acid metal
oxide do not dissolve to have a negative surface potential, and maintaining this
pH value throughout a predetermined time period; and (c) drying and baking the
obtained precursor of the composite metal oxide.
Inventors:
TAKESHIMA SHINICHI (JP)
KOYAMA AKIO (JP)
KOYAMA AKIO (JP)
Application Number:
PCT/JP2007/064388
Publication Date:
January 24, 2008
Filing Date:
July 17, 2007
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
TAKESHIMA SHINICHI (JP)
KOYAMA AKIO (JP)
TAKESHIMA SHINICHI (JP)
KOYAMA AKIO (JP)
International Classes:
C01B13/36; B01D53/86; B01D53/94; B01J23/63; B01J32/00; B01J37/03; B01J37/04; C01B33/00; C01G23/00
Foreign References:
| JP2005518929A | 2005-06-30 | |||
| JP2005313024A | 2005-11-10 | |||
| JPH06198174A | 1994-07-19 | |||
| JP2005254047A | 2005-09-22 | |||
| JPH01201023A | 1989-08-14 | |||
| JPH0549864A | 1993-03-02 | |||
| JP2001314763A | 2001-11-13 | |||
| JPH08266865A | 1996-10-15 | |||
| JP2002282692A | 2002-10-02 |
Other References:
See also references of EP 2050716A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg.5-1, Toranomon 3-chome,Minato-k, Tokyo 23, JP)
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