Title:
REFINING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/014397
Kind Code:
A1
Abstract:
This refining method is for crystallizing a compound having at least one crystal form. A specific infrared wavelength and a specific concentration at which a specific crystal form precipitates from a solution in which the compound is dissolved in a solvent are set as a target wavelength and a target concentration respectively. A solution in which the compound is dissolved in the solvent so as to obtain the target concentration is irradiated with infrared light that includes the target wavelength using an infrared emission device capable of emitting infrared light including the target wavelength, and the solvent is made to evaporate and the specific crystal form is made to precipitate while the above irradiation is carried out.
Inventors:
TOHNAI NORIMITSU (JP)
KATO DAIKI (JP)
KONDO YOSHIO (JP)
YAMADA KAZUNARI (JP)
KATO DAIKI (JP)
KONDO YOSHIO (JP)
YAMADA KAZUNARI (JP)
Application Number:
PCT/JP2021/025390
Publication Date:
January 20, 2022
Filing Date:
July 06, 2021
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
B01D9/02; C07C59/86; C07D223/26; C07D277/56
Domestic Patent References:
| WO2018034305A1 | 2018-02-22 |
Foreign References:
| JP2004504596A | 2004-02-12 | |||
| JP2012529537A | 2012-11-22 | |||
| JP2014189462A | 2014-10-06 | |||
| JPH0142355B2 | 1989-09-12 |
Other References:
JSME TED NEWSLETTER, no. 74, 2014, pages 2 - 10
ACS CENT. SCI., vol. 5, 2019, pages 319 - 326
ACS CENT. SCI., vol. 5, 2019, pages 319 - 326
Attorney, Agent or Firm:
ITEC INTERNATIONAL PATENT FIRM (JP)
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