Title:
TITANIUM OXIDE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/170918
Kind Code:
A1
Abstract:
Provided is a low cost titanium oxide production method that can maintain a high anatase crystal phase content even in high temperature environments. The titanium oxide production method according to the present invention includes a synthesis step in which an aqueous solution, in which titanium tetrachloride and an α-hydroxycarboxylic acid having three carboxy groups are dissolved, is used as a reaction solution, and said reaction solution is made to reach a reaction temperature of at least 60°C and at most the boiling point of the reaction solution in order to synthesize titanium oxide. The ratio of the amount of substance (mol) of the α-hydroxycarboxylic acid to the amount of substance (mol) of Ti in the reaction solution is 0.006-0.017, and the Ti concentration of the reaction solution is 0.07mol/L-0.70mol/L.
Inventors:
CHIKAMI HIDEAKI (JP)
MIZUE KEI (JP)
KOGOI HISAO (JP)
MIZUE KEI (JP)
KOGOI HISAO (JP)
Application Number:
PCT/JP2020/005463
Publication Date:
August 27, 2020
Filing Date:
February 13, 2020
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C01G23/053
Domestic Patent References:
| WO2016002755A1 | 2016-01-07 | |||
| WO2016002755A1 | 2016-01-07 |
Foreign References:
| JPH11171544A | 1999-06-29 | |||
| JP2017114700A | 2017-06-29 | |||
| JPH04280816A | 1992-10-06 | |||
| JP2019027728A | 2019-02-21 | |||
| JP2015027924A | 2015-02-12 | |||
| JP2011063496A | 2011-03-31 | |||
| JPH07267641A | 1995-10-17 | |||
| JP2017114700A | 2017-06-29 |
Other References:
H. KOMINAMI ET AL.: "Hydrolysis of Titanium Alkoxide in Organic Solvent at High Temperatures: A New Synthetic Method for Nanosized, Thermally Stable Titanium (IV) Oxide", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 38, 1999, pages 3925 - 3931
See also references of EP 3904293A4
See also references of EP 3904293A4
Attorney, Agent or Firm:
OIKAWA Shu et al. (JP)
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