Process for producing ammonium polyphosphate
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United States of America Patent
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Jan 20, 1987
Issued Date -
N/A
app pub date -
Apr 19, 1985
filing date -
Dec 13, 1982
priority date (Note) -
Expired
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Abstract
An improved process of concentrating wet process phosphoric acid by continuously contacting an acid feed containing at least about 56 weight percent of P.sub.2 O.sub.5 based on the total weight of the feed with heated gases consisting of air and gaseous fuel combustion products thereby forming a mixture of said gases containing entrained superphosphoric acid particles, continuously coalescing said mixture in a coalescence zone forming coalesced superphosphoric acid and continuously removing the coalesced superphosphoric acid from said coalescence zone.
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