Method and arrangement for the production of particles

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 2/02 (2006.01) B01J 3/00 (2006.01) A61K 9/14 (2006.01) A61K 9/16 (2006.01)

Patent

CA 2706684

A method for producing particles, from a substance, having predetermined size and/or morphology characteristics. The method consists of mixing within a spray nozzle a solution stream containing the substance in dissolved or dispersed form with a supercritical fluid stream. Spraying the mixture through a nozzle into a particle collecting chamber and there separating the particles. The characteristic feature is an additional step, providing a make-up agent (modifier) to the fluid stream, possibly combined with recycling of the fluid and/or performing the method essentially simultaneously in several spray nozzles. Additional features are also a production system comprising functions for performing the method above and the introduction of the make-up agent, recycling of the fluid and performing several runs essentially simultaneously in the same production system. Also a pharmaceutical formulation in which particles produced according to the method has been used for its manufacture.

L'invention concerne un procédé de production de particules à partir d'une substance ayant des caractéristiques de taille et/ou de morphologie prédéterminées. Ledit procédé consiste à mélanger dans une buse de pulvérisation une solution contenant la substance à l'état dissous ou dispersé dans un fluide en écoulement supercritique, à pulvériser le mélange via une buse dans une chambre de collecte de particules et à séparer les particules. Le trait caractéristique est une étape supplémentaire qui consiste à ajouter un agent d'appoint (modificateur) au fluide en écoulement, éventuellement combinée au recyclage du fluide et/ou à la mise en uvre du procédé sensiblement simultanément dans plusieurs buses de pulvérisation. D'autres caractéristiques comprennent également un système de production doté de fonctions permettant de mettre en uvre le procédé ci-dessus et d'introduire l'agent d'appoint, de recycler le fluide et d'effectuer plusieurs passages sensiblement simultanément dans le même système de production. L'invention concerne également une formulation pharmaceutique dans laquelle des particules produites selon le procédé ci-dessus ont été utilisées lors de sa fabrication.

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