Abstract: A method of and an apparatus for the drying of articles, especially foodsfs, biological materials and other substances susceptible to cell damage with overheating, wherein the material is spread in a high-vacuum vessel directly adjacent a cooled condenser and is subjected to a vacuum by a pump capable of developing pressures as low as about 0.1 mbar. The chamber is evacuated until there is a noticeable formation of the condenser whereupon the connection between the pump and the chamber is closed and the product is heated to evaporate liquids but below a predetermined temperature (say a maximum of 50.degree. C.) while the condensate resulting from the evaporation is collected directly below the product and is discharged.
Type:
Grant
Filed:
April 3, 1980
Date of Patent:
September 7, 1982
Assignee:
Kernforschungsanlage Juich, Gesellschaft mit beschrankter Haftung
Inventors:
Francisco J. Dias, Willi Hannen, Hartmut Luhleich, Peter Pflaum