Process for the production of phospho-nitrogenous products and products thus obtained
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United States of America Patent
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Apr 25, 1995
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N/A
app pub date -
Sep 15, 1993
filing date -
Dec 5, 1990
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Abstract
The method relates to the production of phospho-nitrogenous products soluble in neutral ammonium citrate and wherein free urea does not remain in significant amount in such products. Most of the free urea is involved in a ureic combination of calcium sulphate. Tricalcic phosphate is reacted with a reactant obtained by mixing sulfuric acid and urea. The process is particularly useful for the manufacture of fertilizers.
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