Method of and apparatus for freeze-drying previously frozen products
AssigneeAgence Nationale de Valorisation de la Recherche (ANVAR)
InventorHenri Gibert
Life of this patent
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Abstract
A method for freeze drying a previously frozen product by placing the product in a fluidized bed of a finely divided solid purticulate water vapor adsorbent and adjusting the partial pressure of water vapor to a level at which frozen water in the product will sublime.
Claims11
A method of freeze-drying a previously frozen product comprising fluidising a finely divided solid particulate water vapour adsorbent by placing said absorbent in suspension in a carrier gas having a low moisture content in an enclosure, placing said frozen product in said fluidised adsorbentm adjusting the temperature of the fluidised adsorbent and the partial pressure of water vapour in said enclosure to levels at which frozen water contained in said product will sublime.
Dependencies are inferred from the claim text.