Hydrodynamic cavitation crystallization device and process

C - Chemistry – Metallurgy – 30 – B

Patent

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C30B 7/02 (2006.01) C03B 7/14 (2006.01) C30B 7/04 (2006.01) C30B 7/06 (2006.01) C30B 7/10 (2006.01) C30B 29/54 (2006.01)

Patent

CA 2593085

A device and process (10) for crystallizing a compound using hydrodynamic cavitation comprising the steps of mixing at least one stream of a feed solution of such compound to be crystallized with at least one stream of an anti-solvent in a nucleating section via collision of the feed solution and the anti-solvent (11), passing the mixed streams at an elevated pressure through at least one local constriction of flow to create hydrodynamic cavitation thereby causing nucleation and the production of seed crystals, passing the fluid stream containing the seed crystals through an intermediate section (12) to a crystal growth section, passing the fluid stream containing the seed crystals through the crystal growth (13) section at an elevated pressure through at least one local constriction of flow to create hydrodynamic cavitation thereby causing further crystallization of the compound contained in the solution.

L'invention concerne un dispositif et un procédé pour cristalliser un composé utilisant une cavitation hydrodynamique, comprenant les étapes suivantes : mélange d'au moins un flux d'une solution d'alimentation dudit composé à cristalliser avec au moins un flux d'un anti-solvant dans une section de nucléation par l'intermédiaire d'une collision de la solution d'alimentation et de l'anti-solvant ; passage des flux mélangés à une pression élevée à travers un étranglement local de flux, ce qui permet de créer une cavitation hydrodynamique, tout en entraînant la nucléation et la production de cristaux germes ; passage du flux de fluide contenant les cristaux germes à travers une section intermédiaire vers une section de croissance de cristaux ; passage du flux de fluide contenant les cristaux germes à travers la section de croissance des cristaux à une pression élevée à travers au moins un étranglement de flux, ce qui permet de créer une cavitation hydrodynamique tout en entraînant une cristallisation supplémentaire du composé contenu dans la solution.

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