Process for the crystallization of non-sucrose substances
AssigneeFinnfeeds Finland Oy
InventorsKristian Eriksson, Juha Nurmi, Jouko Virtanen
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Abstract
The invention relates to a process for the crystallization of substances having a narrow metastable supersaturation zone. In the process the saturation of a solution is gradually increased and the solution is seeded for the crystallization. The seeding is performed at a seeding point which is selected in response to a signal received from said process indicating imminent or initial spontaneous nucleation. The process provides a good crystal yield and a crystalline product having a uniform crystal structure and a narrow crystal size distribution.
Claims19
A process for the crystallization of a substance having a narrow metastable supersaturation zone, wherein the saturation of a solution of said substance is gradually increased and said solution is seeded for the crystallization, characterized in that seeding is performed at a seeding point which is selected in response to a signal received from said process indicating imminent or initial spontaneous nucleation, said seeding initiating a controlled crystallization based on crystal growth around the nuclei provided by said seeding and enabling the production of a crystalline product having a uniform crystal structure and a narrow crystal size distribution.
Dependencies are inferred from the claim text.