Fluid bed granulation process

B - Operations – Transporting – 01 – J

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B01J 2/16 (2006.01) B01J 8/18 (2006.01)

Patent

CA 2440902

In order to produce granules granulometrically polidispersed in a very little range, a fluid bed granulation process of the type comprising the steps of preparing a fluid bed of seeds (S1) of the substance to be granulated, having a free surface (P) substantially horizontal; and feeding a continuous flow (L) of a fluid comprising a growth liquid, provides in the fluid bed for a continuous vortex (V) with a substantially horizontal axis, in which an upper zone (Z1) of seeds wetting and evaporation of possible solvent contained in the flow (L) and a lower zone (Z2) of solidification/consolidation of the growth liquid are identified.

L'invention concerne un procédé de granulation à lit fluidisé permettant de produire des granulés à polydispersion granulométrique sur une plage très limitée, qui comprend les étapes suivantes: préparation d'un lit fluidisé de germes (S1) de la substance traitée en granulation, avec une surface libre (P) sensiblement horizontale; et alimentation en flux continu (L) d'un fluide comprenant un liquide croissance. On produit dans le lit fluidisé un tourbillon continu (V) selon un axe sensiblement horizontal, et deux zones sont matérialisées: une zone supérieure (Z1) d'humidification de germes et d'évaporation de solvant éventuel contenu dans le flux (L), et une zone inférieure (Z2) de solidification/consolidation du liquide de croissance.

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