METHOD FOR PRODUCTION OF HIGH-CONDENSED AMMONIUM POLYPHOSPHATE

METHOD FOR PRODUCTION OF HIGH-CONDENSED AMMONIUM POLYPHOSPHATE

FIELD: production of high-condensed ammonium polyphosphates useful in various composition as fire-retarding agent. ^ SUBSTANCE: claimed method includes in the first step interaction of phosphorus-containing compound and carbamide at temperature higher than 100°C to produce low molecular condensation...

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Hauptverfasser: VODOP'JANOV VITALIJ GRIGOR'EVICH, IVANOV MIKHAIL GEORGIEVICH, KISELEV ALEKSEJ ALEKSANDROVICH, CHISTOV NIKOLAJ ALEKSEEVICH, MAGIDOV EVGENIJ MARKOVICH, ANDREEV RUSLAN VJACHESLAVOVICH
Format: Patent
Sprache:eng ; rus
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:FIELD: production of high-condensed ammonium polyphosphates useful in various composition as fire-retarding agent. ^ SUBSTANCE: claimed method includes in the first step interaction of phosphorus-containing compound and carbamide at temperature higher than 100°C to produce low molecular condensation product; and in the second step heating of produced product at temperature higher than 200°C in presence of ammonium chloride additives in amount of 3-10 % based on product mass obtained in the first step, wherein as phosphorus-containing compound phosphoric acid and/or ammonium salts thereof are used. Target high-condensed ammonium polyphosphate represents fine dispersed light-gray powder having particle size less than 0.15 mm. ^ EFFECT: production of high-condensed ammonium polyphosphate without milling process. ^ 7 ex