Title:
FINE PARTICLE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2015/125819
Kind Code:
A1
Abstract:
This fine particle production method involves a dissolving step in which a stirrer having a rotating stirring blade is used to dissolve at least one type of fine particle raw material in a solvent to obtain a fine particle raw material solution, and a precipitation step in which the fine particle raw material solution and at least one type of precipitation solvent for precipitating the fine particle raw material from the fine particle raw material solution are introduced between at least two treatment surfaces which are arranged oppositely one another, can move closer to and farther apart from one another, and at least one of which can rotate relative to the other, and the fine particle raw material solution and the at least one type of precipitation solvent are mixed in a thin film fluid formed between the at least two treatment surfaces, and the fine particles are precipitated. The stirring energy is determined by the stirring time conditions of the stirrer, the circumferential velocity conditions of the stirring blade, and the temperature conditions of the fine particle raw material solution, and in the dissolving step, the stirring energy is varied by changing at least one of the aforementioned conditions, and by changing the stirring energy, the degree of crystallization and the crystal form of the fine particles obtained in the precipitation step are controlled.
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Inventors:
ENOMURA MASAKAZU (JP)
Application Number:
PCT/JP2015/054427
Publication Date:
August 27, 2015
Filing Date:
February 18, 2015
Export Citation:
Assignee:
M TECH CO LTD (JP)
International Classes:
B01J19/00; C09B48/00; C09B67/14; C09B67/20; A61K31/405
Domestic Patent References:
| WO2012128273A1 | 2012-09-27 |
Foreign References:
| JP2011161375A | 2011-08-25 | |||
| JP2000072436A | 2000-03-07 | |||
| JP2012157858A | 2012-08-23 |
Other References:
See also references of EP 3112017A4
Attorney, Agent or Firm:
SAMEJIMA TAKENOBU (JP)
Takenobu Sameshima (JP)
Takenobu Sameshima (JP)
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