Method of producing potassium sulfate
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United States of America Patent
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-
Nov 13, 2001
Grant Date -
N/A
app pub date -
Jun 14, 1999
filing date -
Jun 16, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for producing potassium sulfate by reacting ammonium sulfate and potassium chloride at a temperature of about 30 to 40.degree. C. to produce a slurry containing K.sub.2 SO.sub.4.multidot.NH.sub.4.multidot.2SO.sub.4 double salt, and reacting this double salt with an aqueous solution containing potassium chloride at a temperature of about 30.degree. C. to produce a slurry containing potassium sulfate. The slurry containing potassium sulfate is subjected to a solids/liquid separation step to obtain potassium sulfate crystals having a size in the range of about 20 mesh to about 150 mesh.
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