Method and apparatus for preparing particles

Details Method and apparatus for preparing particles Method and apparatus for preparing particles

B - Operations, Transporting

01

J

B01J 2/04 (2006.01) B01F 5/02 (2006.01)

Patent

CA 2454331

Method for Preparing a target substance in particulate form, comprising introducing into a particle formation vessel, through separate first and second fluid inlet means respectively, (a) a "target solution/suspension" of the substance in a fluid vehicle and (b) a compressed fluid anti-solvent, and allowing the anti-solvent to extract the vehicle so as to form particles of the substance, wherein the anti-solvent fluid has a sonic, near-sonic or supersonic velocity as it enters the vessel, and wherein the anti-solvent and the target solution/suspension enter the vessel at different locations and meet downstream (in the direction of anti-solvent flow) of the second fluid inlet means. Also provided is apparatus for use in such a method.

L'invention concerne un procédé de préparation d'une substance cible sous forme de particules. Ledit procédé consiste à introduire dans un récipient de formation de particules, à travers des premier et second dispositifs d'entrée de fluide respectifs, (a) une <= solution/suspension cible >= de la substance dans un excipient du fluide et (b) un anti-solvant comprimé, et à permettre à l'anti-solvant d'extraire l'excipient, de manière à former des particules de la substance. Le fluide de l'anti-solvant possède une vitesse sonique, presque sonique ou supersonique, tandis qu'il entre dans le récipient, et l'anti-solvant et la <= solution/suspension cible >= entrent dans le récipient à divers emplacements et se rencontrent en aval (dans le sens du flux de l'anti-solvant) du second dispositif d'entrée de fluide. Cette invention a aussi trait à un appareil utilisé dans un tel procédé.

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