Process and apparatus for separating substances by crystallization
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United States of America Patent
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Jul 27, 1993
Grant Date -
N/A
app pub date -
Dec 10, 1991
filing date -
Dec 21, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for the separation of substances by melt crystallization. The organic mixtures which are difficult to crystallize are heated to a temperature sufficient to obtain a melt with the melt then being moved through a three-dimensional crystallization matrix having a large specific area. The melt is slowly cooled over a temperature range so as to achieve a selective crystallization from the supersaturated melt in the carrier matrix. A deposited crystal phase is thereafter melted and separated from the carrier matrix and removed by centrifugation. The carrier matrix may have a crystallization-promoting microstructure surface and may consist of an openpored foam.
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