Method of producing potassium magnesium phosphate
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United States of America Patent
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Aug 20, 1985
Grant Date -
N/A
app pub date -
Jun 13, 1983
filing date -
May 6, 1982
priority date (Note) -
Expired
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Abstract
Process for producing potassium magnesium phosphate by reacting basic magnesium compounds with phosphoric acid or phosphates in the presence of potassium sulfate from a mother liquor containing per 1000 g water up to 150 g magnesium sulfate and up to 120 g potassium sulfate. Precipitation forms with addition of calcium oxide or hydroxide equimolar to present magnesium sulfate and after phosphoric acid adjustment of the pH to 2-4, mechanical separation and addition of potassium sulfate and basic magnesium compounds, the desired product results.
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