Title:
REFINING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/014395
Kind Code:
A1
Abstract:
This refining method involves crystallizing a compound that has at least one crystalline form, wherein: a specific infrared wavelength, at which a specific crystalline form precipitates from a solution obtained by dissolving the compound in a solvent, is set as a target wavelength; and an infrared-ray-emitting device capable of emitting infrared rays including the target wavelength is used to evaporate the solvent and cause the specific crystalline form to precipitate while the solution is irradiated with infrared rays including the target wavelength. When setting the specific infrared wavelength as the target wavelength, it is preferable to set said infrared wavelength on the basis of the infrared absorption spectrum of the crystalline form and the dissolution speed of the compound with respect to the solvent.
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/JP2021/025388
Publication Date:
January 20, 2022
Filing Date:
July 06, 2021
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
B01D9/02; C07C59/86; C07C229/40; C07D277/56
Domestic Patent References:
| WO2018034305A1 | 2018-02-22 |
Foreign References:
| JP2012529537A | 2012-11-22 | |||
| JP2004267114A | 2004-09-30 | |||
| JPH0142355B2 | 1989-09-12 |
Other References:
JSME TED NEWSLETTER, no. 74, 10 July 2014 (2014-07-10)
JSME TED NEWSLETTER, no. 74, 2014, pages 2 - 6
ACS CENT. SCI., vol. 5, 2019, pages 319 - 326
JSME TED NEWSLETTER, no. 74, 2014, pages 2 - 6
ACS CENT. SCI., vol. 5, 2019, pages 319 - 326
Attorney, Agent or Firm:
ITEC INTERNATIONAL PATENT FIRM (JP)
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