METHOD OF CRYSTALLIZATION-MEDIATED PREPARATION OF CRYSTALLINE SUBSTANCES Russian patent published in 1999 - IPC

FIELD: crystal growing. SUBSTANCE: invention is intended for application in chemical and pharmaceutical industries when producing synthetic drugs. Saturated solution potassium nitrate or anaprilin is placed in working chamber while maintaining temperature 70-90 C. Chamber is placed on vibrodrive for 180 deg. rotation. Set up are vibration amplitude 2-5 mm, vibration acceleration 20-70 m/s^-1, crystallization time 0.5-5 hr. Filtration is carried out when working chamber is turned over at angle 180 deg and the same vibration parameters. Filtration finished, working chamber is returned into starting position potassium nitrate is dried at 70 C (anaprilin at 90 C) and the same vibration parameters. Defect-free crystals are obtained containing no cavities with mother solution. EFFECT: improved crystal quality. 1 dwg, 2 tbl