Method and apparatus for continuous freeze drying

Details Method and apparatus for continuous freeze drying Method and apparatus for continuous freeze drying

1985-05-28

1985-12-31

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 92, F26B 506, F26B 1330

Patent

active

045611912

ABSTRACT:
A method and apparatus for freeze drying heat sensitive aqueous products on a continuous basis, utilizing molecular sieves to sequester the sublimating water vapor, is described. At least two beds of sieve are used sequentially, one being heat regenerated while another is actively adsorbing condensable vapors. Exotherm is controlled during freeze drying, and bed regeneration may be accomplished without the use of a purge gas. The advantages of certain types and sizes of molecular sieves, in a continuous freeze drying procedure, is discussed.

REFERENCES:
patent: 3453741 (1969-07-01), King, III et al.
patent: 3516170 (1970-06-01), Liobis et al.

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