Recrystallization is applied when the feedstock is a salt/solids
instead of a solvent. In the process the feed salt is dissolved in unsaturated
circulation brine. Impurities are removed by decantation. The purified salt is
crystallized in a vacuum cooling crystallization.
Reprecipitation
Reprecipitation of salt is
carried out by dissolving of a salt in the mother liquor and simultaneously
precipitation of the product salt. This process is applied in cases of
different solubility behaviour of the two salts.