Freeze-drying process and apparatus

Details Freeze-drying process and apparatus Freeze-drying process and apparatus

F - Mech Eng,Light,Heat,Weapons

26

B

F26B 5/06 (2006.01)

Patent

CA 2215748

A freeze-drying process includes a freezing step of rotating the vial (1) about its longitudinal axis at a speed not less than that required to maintain by centrifugal force the aqueous material to be freeze-dried in the form of a shell (7) on the inner walls of the vial (1) and then subjecting the material to freezing conditions to freeze it in the form of said shell (7). In another aspect of the invention, the freeze-drying process also includes the step of drying the shell frozen material (7), by directing heat radially inwards from a heating block (14) to the shell frozen material (7) and increasing the temperature over a time period to dry the shell frozen material (7).

Un procédé de lyophilisation comprend une étape de congélation pendant laquelle un flacon (1) tourne autour de son axe longitudinal à une vitesse qui n'est pas inférieure à celle requise pour maintenir, par la force centrifuge, le matériau aqueux à lyophiliser sous la forme d'une coque (7) sur les parois internes du flacon (1) . Ensuite, le produit à congeler est soumis à des conditions de congélation pour être congelé sous la forme de ladite coque (7). Selon un autre aspect de l'invention, le processus de lyophilisation comprend également l'étape consistant à sécher la coque de produit congelé (7), en dirigeant de la chaleur radialement vers l'intérieur, depuis un bloc chauffant (14), sur la coque (7) de produit congelé et en augmentant la température pendant un certain temps pour sécher la coque (7) de matériau congelé.

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