In the device called Lyophilization Lyophilizer, the materials are frozen by going down to -50 to -600 C.
It creates a vacuum environment that will provide both sublimation and drying. Frozen products can be placed in this device in another refrigerator. The escaping water vapor is turned into ice by condensing in the condensers instead of being discharged by the vacuum pump.
This ice is thawed and taken out before the next cycle. Cycle freezing consists of primary drying and secondary drying stages.
In the secondary drying, the last water molecules attached to the material are taken out with the help of vacuum. Time varies from product to product. If the freezing speed is slow, large ice crystals are formed, if fast, small ice crystals are formed. This affects the drying rate and speed.
This website uses cookies to improve user experience and for efficient operation of the website. For more information, read our Cookie Policy.
OK.