Method and apparatus for purifying chemical substances
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United States of America Patent
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-
Sep 22, 1998
Grant Date -
N/A
app pub date -
Mar 14, 1996
filing date -
May 5, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
After being subjected to a melt crystallization operation, a crystal-containing melt is formed into particles of the same size and shape and then conducted in counter-flow relationship to washing liquid in a washing column. The crystal-containing melt can be formed into particles by a device which deposits the crystal-containing melt as identically sized drops onto a cooling belt. The particles can be completely hardened or only partially hardened when entering the washing column.
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