Process for the production of potassium magnesium phosphate
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United States of America Patent
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Aug 12, 1980
Grant Date -
N/A
app pub date -
Jul 17, 1979
filing date -
Jul 19, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for producing potassium magnesium phosphate from phosphoric acid, potassium chloride and magnesium oxide, carbonated or like alkaline magnesium compound, which comprises adding the magnesium compound to an aqueous solution of the phosphoric acid or the acidic soluble phosphate salt and an amount of potassium chloride in excess of that theoretically required, in an amount and at a rate such that the pH is maintained below 9 and a high ratio of potassium chloride to magnesium chloride is maintained in the reaction mixture, whereby the formation of tribasic magnesium phosphate is suppressed.
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