F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
F26B 9/00 (2006.01)
Patent
CA 2383070
The invention concerns a method for drying moisture-sensitive substances with a solvent which mainly consists in separating said substances from an ambient atmosphere wherein said solvent is present by hermetically sealing said substances in an envelope having advantageously a wall zone non-adherent to said substances wherein said envelope consists essentially of a polymer membrane selectively permeable to the moisturising solvent vapour except to said solvent in liquid state. The inventive method is also useful for preventive treatment of dry substances against moisture.
L'invention concerne un procédé de séchage de matières sensibles à l'humidification par un solvant qui consiste principalement à séparer lesdites matières d'une atmosphère environnante dans laquelle ledit solvant est présent en enfermant hermétiquement lesdites matières dans une enveloppe présentant avantageusement une zone de paroi non adhérente auxdites matières dans laquelle ladite enveloppe est essentiellement constituée par une membrane polymère sélectivement perméable à la vapeur du solvant d'humidification à l'exclusion dudit solvant à l'état liquide. Le procédé conforme à l'invention intervient également en prévention contre l'humidification de matières sèches.
Deschamps-Hulak Isabelle
Duhaut Patrick
Wittich Eberhard
Biotel
Goudreau Gage Dubuc
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