Process for producing ammonium polyphosphate of crystalline form II
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United States of America Patent
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Feb 17, 1998
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N/A
app pub date -
Dec 28, 1995
filing date -
Jan 12, 1995
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Abstract
A process for producing ammonium polyphosphate of crystalline form II is described, which comprises heating a mixture of a phosphate-containing substance and a condensation agent in an ammoniacal wet air atmosphere in the presence of ammonium polyphosphate of crystalline form II as a compound for crystal formation (seed compound) to condense the phosphate-containing substance with the condensation agent.
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