Title:
PROCESS FOR PRODUCING VANADIUM-DIOXIDE-CONTAINING PARTICLES
Document Type and Number:
WIPO Patent Application WO/2017/208892
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a process for producing vanadium-dioxide-containing particles which have a small average particle diameter and a narrow particle diameter distribution, are excellent in terms of monodispersity and dispersion stability, and have excellent thermochromic properties. The process for producing vanadium-dioxide-containing particles of the present invention comprises using a flow-through type reactor including a hydrothermal reaction part and using a liquid reaction mixture obtained by mixing a raw-material slurry, the slurry comprising a vanadium-containing compound and water, and a compound that reacts with the vanadium-containing compound, with water in a supercritical or subcritical state. The production process is characterized in that 1) the water is degassed water, 2) the time over which the liquid reaction mixture passes through the hydrothermal reaction part is 3-1,000 seconds, 3) the raw-material slurry is subjected, before the hydrothermal synthesis, to a desalting treatment for salt removal therefrom and hence the particles have an average particle diameter of 15-40 nm and an average crystallite diameter of 15-40 nm, or 4) prior to the step of producing vanadium-dioxide-containing particles, the raw-material slurry is subjected to a dispersing treatment.
Inventors:
KUDO TOMOHIRO (JP)
CHIBA TAKATO (JP)
TAKAMUKI YASUHIKO (JP)
HAYASHI KENJI (JP)
CHIBA TAKATO (JP)
TAKAMUKI YASUHIKO (JP)
HAYASHI KENJI (JP)
Application Number:
PCT/JP2017/019096
Publication Date:
December 07, 2017
Filing Date:
May 23, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
C01G31/02; B01J3/00; C02F1/20; C09K9/00
Domestic Patent References:
| WO2010090274A1 | 2010-08-12 | |||
| WO2017006699A1 | 2017-01-12 | |||
| WO2016158103A1 | 2016-10-06 | |||
| WO2016100967A1 | 2016-06-23 |
Foreign References:
| JP2010069474A | 2010-04-02 | |||
| US20150318548A1 | 2015-11-05 | |||
| JP2016130201A | 2016-07-21 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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