Process for the preparation of pure aluminum chloride hexahydrate
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United States of America Patent
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-
Apr 28, 1981
Grant Date -
N/A
app pub date -
Jul 30, 1979
filing date -
Jul 31, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the preparation of pure aluminum chloride hexa hydrate is disclosed, in which the crystallisate mixture from the mother solution (centrifugate) and starting solution (wash solution) is treated first to the coldest of a number of crystallization steps, pumped to the hottest step by retrograde feeding, and in which only from the hottest step is a portion of the mother solution now rich in impurities removed.
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