Method for preparing particles

B - Operations – Transporting – 01 – J

Patent

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B01J 2/04 (2006.01)

Patent

CA 2706318

The present invention relates to a new method for preparing micron-sized particles which comprises introducing in the particle formation vessel a solute solution in a solvent and a compressed fluid under supercritical conditions, wherein the vessel in which the particles are formed is at a pressure comprised between atmospheric pressure and 15 bar. The particles obtained present a small size, a limited size distribution, and low agglomeration. Particles with suitable fluidity can furthermore be prepared from products, for example, pharmaceutical active ingredients and/or excipients, with a low glass transition temperature.

La presente invención se refiere a un nuevo procedimiento para la preparación de partículas micrónicas que comprende introducir en el recipiente de formación de partículas una solución de un soluto en un disolvente, y un fluido comprimido en condiciones supercríticas, en donde el recipiente en el que se forman las partículas se encuentra a una presión comprendida entre la presión atmosférica y 15 bares. Las partículas obtenidas presentan un tamaño reducido, una distribución de tamaño estrecha, y una baja aglomeración. Además se pueden preparar partículas con una buena fluidez a partir de productos, por ejemplo principios activos farmacéuticos y/o excipientes, con una temperatura de transición vitrea baja.

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