Method for preparation of microspheres and apparatus therefor

Details Method for preparation of microspheres and apparatus therefor Method for preparation of microspheres and apparatus therefor

A - Human Necessities

61

J

A61J 3/02 (2006.01) A61K 9/16 (2006.01) B01J 13/04 (2006.01)

Patent

CA 2497723

In the production of microspheres by an in-water drying method, an iterative process is employed which comprises emulsifying a medicated polymer solution (4) containing an organic solvent in an emulsifier (1) to form an emulsion, transferring this emulsion to a microsphere storage tank (2), introducing a part of the emulsion into a cross flow filter (3) from the tank (2), and returning a solution passing through the filter to the tank (2). The process permits the downsizing and closing of a unit for repeating the production of a small amount of microspheres and makes it possible to control the production scale of microspheres freely.

La présente invention concerne la production de microsphères par un procédé de séchage en milieu aquatique, dans laquelle on met en oeuvre un procédé itératif qui consiste à émulsifier une solution polymère médicamenteuse (4) contenant un solvant organique dans un émulsifiant (1), afin de former une émulsion, à transférer cette émulsion dans un réservoir de stockage de microsphères (2), à introduire une partie de l'émulsion provenant du réservoir (2) dans un filtre de filtration tangentielle (3), puis à ramener une solution passant à travers ledit filtre au réservoir (2). Ce procédé permet de réduire la taille et de fermer une unité pour répéter la production d'une petite quantité de microsphères et de pouvoir commander librement l'échelle de production de microsphères.

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