Process and apparatus for mixing cohesive powders

B - Operations – Transporting – 01 – F

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Details

B01F 3/18 (2006.01) A61J 3/02 (2006.01) B01F 5/24 (2006.01) B01F 9/00 (2006.01) B01F 9/02 (2006.01) B01F 11/00 (2006.01) B01F 11/02 (2006.01)

Patent

CA 2181262

The invention relates to a method of mixing cohesive finely divided powders such as finely divided powdered medicaments having a particle size less than about 10 µm comprising the combination of a rotating/vibrating movement with a sieving procedure, wherein the method comprises the steps of adding a finely divided powdered mixture of substances to a perforated partition in a container, subjecting the container to a rotational and preferably vibrating movement in horizontal and/or vertical directions whereby the rotational movement is performed in intervals and whereby the container is turned in a vertical direction an angle of substantially 180° during each turn. The invention also includes an apparatus for mixing finely divided powders to be used in the above-mentioned method as well as the use of the method according to the invention for mixing cohesive finely divided powders.

La présente invention concerne un procédé de mélange de poudres cohésives finement fractionnées, telles que des médicaments réduits en poudre finement fractionnée, dont la taille particulaire est inférieure à environ 10 µm, ledit procédé associant un mouvement de rotation ou de vibration à un processus de tamisage. Le procédé consiste à déposer sur une cloison perforée d'un récipient un mélange de substances réduit en poudre finement fractionnée, puis à soumettre le récipient à un mouvement de rotation et à un mouvement de vibration de préférence horizontal et/ou vertical, le mouvement de rotation ayant lieu par intermittence et le récipient étant retourné dans le sens vertical selon un angle faisant substantiellement 180~ à chaque tour. L'invention concerne également un dispositif de mélange de poudres finement fractionnées fonctionnant selon ledit procédé, et l'utilisation du procédé mis en oeuvre selon la présente invention pour mélanger des poudres cohésives finement fractionnées.

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