Methods and apparatus for making particles using spray dryer...

B - Operations – Transporting – 01 – J

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B01J 2/04 (2006.01) A61K 9/16 (2006.01) B01D 1/18 (2006.01) F26B 3/12 (2006.01) F26B 17/10 (2006.01)

Patent

CA 2511376

Methods and apparatus are provided for making particles comprising: (a) spraying an emulsion, solution, or suspension, which comprises a solvent and a bulk material (e.g., a pharmaceutical agent), through an atomizer (14) and into a primary drying chamber (12), having a drying gas flowing therethrough, to form droplets comprising the solvent and bulk material dispersed in the drying gas; (b) evaporating, in the primary drying chamber (12), at least a portion of the solvent into the drying gas to solidify the droplets and form particles dispersed in drying gas; and (c) flowing the particles and at least a portion of the drying gas through a jet mill (24) to deagglomerate or grind the particles. By coupling spray drying with "in-line" jet milling, a single step process is created from two separate unit operations, and an additional collection step is advantageously eliminated. The one-step, in-line process has further advantages in time and cost of processing.

La présente invention a trait à des procédés et un appareil pour la fabrication de particules comprenant : (a) la pulvérisation d'une émulsion, solution, ou suspension, qui comporte un solvant et un matériau en vrac (par exemple, un agent pharmaceutique), à travers un atomiseur (14) et dans une chambre de séchage primaire (12), comprenant un écoulement de gaz de séchage la traversant, pour former des gouttelettes comprenant le solvant et le matériau en vrac dispersés dans le gaz de séchage ; (b) l'évaporation, dans la chambre de séchage primaire (12), d'au moins une portion du solvant dans le gaz de séchage pour solidifier les gouttelettes et former des particules dispersées dans le gaz de séchage ; et (c) l'écoulement des particules et d'au moins une portion du gaz de séchage à travers un broyeur à jet (24) pour la désagrégation ou le broyage des particules. Grâce à la combinaison de broyage à jet en ligne, on obtient un procédé à étape unique à partir de deux opérations en unités séparées, et on élimine de manière avantageuse une étape supplémentaire de collecte. Le procédé à étape unique en ligne présente d'autres avantages en termes de temps et de coût de production.

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