Purification of frozen crystal layers

Details Purification of frozen crystal layers Purification of frozen crystal layers

1988-02-10

1989-01-03

Sever, Frank

Liquid purification or separation

Processes

Separating

62532, B01D 904

Patent

active

047955716

ABSTRACT:
Frozen crystal layers are purified by a process in which these crystal layers, after they have been frozen out from a melt or solution on a cooling surface, are brought into contact with a purifying liquid and thus purified over their entire thickness, after which the said layers are separated from the purifying liquid and then melted, wherein the temperature of the crystal layers and of the purifying liquid is close to the melting point or solubility temperature, mass transfer at the phase boundary is intensified by forced convection, and this purification is carried out in the course of from 1 to 60 minutes on layers having a thickness of from 0.2 to 10 mm.

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