Title:
METHOD FOR PRODUCING DISPERSION OF IRON-CONTAINING RUTILE-TYPE TITANIUM OXIDE MICROPARTICLES, IRON-CONTAINING RUTILE-TYPE TITANIUM OXIDE MICROPARTICLES AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/181241
Kind Code:
A1
Abstract:
[Problem] To provide: titanium oxide-based microparticles which show a suppressed photocatalytic activity while maintaining a high refractive index and have an excellent transparency; a dispersion thereof; a method for producing the same, etc.
[Solution] A method for producing a dispersion of iron-containing rutile type titanium oxide microparticles, said method comprising: (1) a step for neutralizing an aqueous solution of a metal salt of a mineral acid, which contains Ti and Fe at such a ratio as to satisfy the requirement 0.001≤Fe2O3/(TiO2+F2O3)≤0.010, to give iron-containing aqueous titanic acid; (2) a step for further adding an aqueous hydrogen peroxide solution thereto to give an aqueous solution of iron-containing peroxotitanic acid having an average particle diameter of 15-50 nm; (3) a step for further adding a tin compound in such a manner as to satisfy the requirement 6≤TiO2/SnO2≤16; (4) a step for further adding a sol of silica-based microparticles, said microparticles containing Si and a metal element M at such a ratio as to satisfy the requirement 99.9/0.1≤(SiO2/MOx/2)≤80/20, in such a manner as to satisfy the requirement 0.08≤SiO2/(oxide of the other element)≤0.22; and (5) a step for hydrothermally treating the solution obtained in step (4).
Inventors:
YAMAGUCHI JUN (JP)
MIYAZAKI TAKUMI (JP)
MURAGUCHI RYO (JP)
UEHARA TATSUYA (JP)
MIYAZAKI TAKUMI (JP)
MURAGUCHI RYO (JP)
UEHARA TATSUYA (JP)
Application Number:
PCT/JP2018/012287
Publication Date:
October 04, 2018
Filing Date:
March 27, 2018
Export Citation:
Assignee:
JGC CATALYSTS & CHEMICALS LTD (JP)
International Classes:
C01G23/053; C09C1/36; C09D7/62; C09D201/00
Foreign References:
| JP2011132484A | 2011-07-07 | |||
| JP2010168266A | 2010-08-05 | |||
| JPH05330825A | 1993-12-14 | |||
| JPH02255532A | 1990-10-16 | |||
| JPH11172152A | 1999-06-29 | |||
| JP2000204301A | 2000-07-25 | |||
| JPS63123807A | 1988-05-27 | |||
| JP2009197078A | 2009-09-03 | |||
| JP2009155496A | 2009-07-16 | |||
| JP2009056387A | 2009-03-19 |
Other References:
See also references of EP 3604226A4
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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