| abstract |
There is provided a process for producing fine particles of an organic compound by a continuous-type poor solvent precipitation method which is capable of rapidly and uniformly dispersing an organic compound-containing solution in a large amount of a poor solvent, thereby more readily producing fine particles of the organic compound having a volume-average particle size of not more than 1 ยต m. In the process for producing fine particles of an organic compound, the poor solvent in which the organic compound is hardly soluble, is continuously mixed with the organic compound-containing solution prepared by dissolving the organic compound in a good solvent which is miscible with the poor solvent and in which the organic compound is readily soluble, while irradiating an ultrasonic wave thereto. |