Process for the formulation of potassium chloride from a carnallite source
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United States of America Patent
Stats
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Oct 9, 2012
Grant Date -
May 26, 2011
app pub date -
Nov 23, 2009
filing date -
Nov 23, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A process for formulating high purity potassium chloride from a carnallite source. The process takes advantage of solubility differences and saturation levels in a multiple salt system generated upon dissolution of carnallite. In the system, the sodium chloride is kept in solution and the magnesium chloride present in the system is controlled to be in a concentration range of between 12% and 25% by weight. This avoids co-precipitation of sodium chloride with the potassium chloride during crystallization and therefore prevents the sodium chloride from contaminating the potassium chloride. The result is high grade potassium chloride.
First Claim
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