Spray drying process for preparing dry powders

B - Operations – Transporting – 01 – J

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B01J 2/04 (2006.01) A61K 9/16 (2006.01) B01D 1/18 (2006.01)

Patent

CA 2376937

The present invention provides exemplary systems and methods for producing dry powder formulations. In one embodiment, a system (10) includes at least one conditioning zone (12) having an inlet (20) to introduce an atomized formulation (18) into the conditioning zone. A controller (14, 16) controls temperature and relative humidity of the airflow into the conditioning zone to allow amorphous-to-crystalline transformation of the atomized formulation. In another embodiment, the formulation is suspended in the conditioning zone for a residence time of sufficient duration to allow surface orientation of surface active components. A dryer (24) is coupled to the conditioning zone to dry the atomized formulation, and a collector (28) collects the formulation in powder form.

La présente invention concerne des exemples représentatifs des systèmes et des procédés qui permettent de produire des formulations de poudre sèche. Dans un mode de réalisation, un système (10) comprend au moins une zone de conditionnement (12) pourvue d'une entrée (20) permettant l'introduction d'une formulation atomisée (18) dans la zone de conditionnement. Un dispositif de commande (14, 16) commande la température et l'humidité relative du flux d'air dans la zone de conditionnement, afin de permettre une transformation de la formulation atomisée d'amorphe en cristalline. Dans un autre mode de réalisation, la formulation est mise en suspension dans la zone de conditionnement pendant un temps de séjour d'une durée suffisante pour permettre une orientation superficielle des composants actifs superficiels. Un dispositif de séchage (24) est connecté à la zone de conditionnement, afin de sécher la formulation atomisée, et un collecteur (28) collecte la formulation sous forme pulvérulente.

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