公开(公告)号：US20230356104A1

公开(公告)日：2023-11-09

申请号：US18040348

申请日：2021-08-02

Applicant: DHF AMERICA LLC

Inventor： Tomoaki SAKURAI ,  Isamu UMEDA ,  Kotaro HIRAYAMA ,  Kyoko HIRAYAMA

IPC: B01D9/00 ,  C07C51/43

CPC classification number: B01D9/0031 ,  B01D9/0063 ,  C07C51/43

Abstract: A method of crystallizing a solution (24) having at least one compound mixed (18) with a dissolving agent (20) is provided. The method includes performing a heating process by heating the solution (24) until a current temperature of the solution is equal to a predetermined treatment temperature, maintaining the current temperature at the predetermined treatment temperature for a predetermined treatment time period, performing a cooling process by cooling the solution (24) until the current temperature is less than the predetermined treatment temperature and a crystallization temperature of the at least one compound (18), causing formation of a plurality of crystal particles (30) of the at least one compound by cooling the solution until the current temperature is equal to a predetermined termination temperature of the at least one compound (18), and varying a particle size of each of the crystal particles (30) based on a cooling speed of the solution.