2022 Volume 59 Issue 9 Pages 459-463
Continuous crystallization is the next step of manufacturing especially at the production of pharmaceutical ingredients. We have developed small-scale continuous taylor-vortex crystallizer that is suitable for research in laboratory. But there was a problem that rotating inner cylinder at high-speed range causes much frictional heat and it raises the temperature of the solution, that may spoil the effort of controlling characteristics of crystals. So, we have developed new taylor-vortex crystallizer that has inner cooling system. We conducted several examinations of anti-solvent crystallization of glycine, which aims to obtain unstable crystal polymorph of glycine continuously. The new crystallizer showed the advantage of crystallizing unstable crystal polymorph.
