High performance in-situ freezing-melting process

Details High performance in-situ freezing-melting process High performance in-situ freezing-melting process

1991-05-31

1995-02-14

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62123, 62532, F25J 500

Patent

active

053884140

ABSTRACT:
The processes and apparatuses of the present invention are to be used in separating a mass of purified volatile solvent from a dilute solution of the solvent. They are used in purification of chemicals, water pollution prevention and water purification. The process comprises: (a) an in-situ formation of a smooth layer of solvent solid on a freezing surface while agitating the solid-liquid interface, (b) vaporization of an auxiliary medium to generate a first vapor, (c) in-situ washing of the surface of the smooth solvent solid and (d) in-situ melting of purified solvent solid by condensing a mass of super-triple point solvent vapor. Several types of auxiliary mediums to be used, methods of transforming the first vapor into a mass of liquid and methods of upgrading heat and regenerating the auxiliary mediums have been introduced.

REFERENCES:
patent: 4236382 (1980-12-01), Cheng et al.
patent: 4505728 (1985-03-01), Cheng et al.
patent: 4578093 (1986-03-01), Cheng et al.
patent: 4650507 (1987-03-01), Cheng et al.
patent: 4654064 (1987-03-01), Cheng et al.
patent: 4810274 (1989-03-01), Cheng et al.

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