Freeze-drying process

Details Freeze-drying process Freeze-drying process

1975-08-25

1977-01-11

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 92, 165185, F26B 506

Patent

active

040019446

ABSTRACT:
A process is provided for freeze-drying an aqueous liquid product which comprises distributing the liquid product in containers closely fitted in cavities of a tray-shaped heat-conducting solid metal block having relatively high heat transfer, subjecting the block to accelerated cooling such that the liquid in each container is frozen thereby freezing the liquid in each container at substantially the same rate, and drying the frozen product under vacuum while in the block so that the frozen product in each container is dried at substantially the same rate.

REFERENCES:
patent: 2199817 (1940-05-01), Flosdorf
patent: 2803888 (1957-08-01), Cerletti
patent: 3009258 (1961-11-01), Taylor
patent: 3391466 (1968-07-01), Browwer et al.
patent: 3607858 (1971-09-01), Querry et al.

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