SU710927A1 - Method of preparing ammonium polyphosphate - Google Patents
Method of preparing ammonium polyphosphate Download PDFInfo
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- SU710927A1 SU710927A1 SU772540712A SU2540712A SU710927A1 SU 710927 A1 SU710927 A1 SU 710927A1 SU 772540712 A SU772540712 A SU 772540712A SU 2540712 A SU2540712 A SU 2540712A SU 710927 A1 SU710927 A1 SU 710927A1
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- USSR - Soviet Union
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- ammonium polyphosphate
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- urea
- ammonium
- polyphosphate
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Description
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Изобретение относитс к способам получени труднорастворимого полифосфата аммони , примен ющегос в качестве антипирена в составе огнезащитных покрытий металлических , конструкций зданий и сооружений,при изготовлении конструктивных огнестойких материалов.The invention relates to methods for producing a poorly soluble ammonium polyphosphate, which is used as a flame retardant in flame retardant coatings for metal, building structures and structures, in the manufacture of structural fire-resistant materials.
Известен способ получени труднорастворимого полифосфата аммони путем обработки расплава ортофосфата аммони газообразным аммиаком при 300400с и интенсивном перемешивании.A known method for producing the sparingly soluble ammonium polyphosphate is by treating the ammonium orthophosphate melt with gaseous ammonia at 300400 s and vigorous stirring.
Недостаток способа - образование в зких,трудно транспортируемых расплавов полифосфатов 1.The disadvantage of this method is the formation of viscous, difficult-to-transport melts of polyphosphates 1.
Целесообразность выбранных интервалов объ сн етс следующим. При использовании избыточного количества мочевины сверх эквимол рного соотношени 1:1, образуетс р д производных мочевины. Присутствие их в конечном продукте ведет к снижению содержани основного вещества и в нем.и к уменьшению содержани PgOg Продукт, получаемый по известному способу, при мольном соотношении мочевина: :ортофосфат аммони в исходной смеси 1,5:1 содержит 60% .При соотношении мочевина : ортофосфат аммони , большем, чес 1,2:1, продукт содержит менее 70% , например, при соотношении 1,3:1-67,0% ,The appropriateness of the selected intervals is explained as follows. When an excess amount of urea is used in excess of an equimolar ratio of 1: 1, a series of urea derivatives is formed. Their presence in the final product leads to a decrease in the content of the basic substance and in it and to a decrease in the PgOg content. The product obtained by a known method, with a molar ratio of urea: ammonium orthophosphate in the 1.5: 1 mixture contains 60% : ammonium orthophosphate, greater than, ches 1.2: 1, the product contains less than 70%, for example, at a ratio of 1.3: 1-67.0%,
При снижении Долимочевины меньш эквимол рной, возрастает содержание воднорастворимой формы и уменьшаетс общее количество за счет неполноты протекани реакции . дегидратации ортофосфата. Так,при мольном отношении мочевина:ортофосфат аммони 0,75:1, продукт содержит 70,8% . 42,4% Р О воднорастворимого .By reducing Dolimourea to a less equimolar one, the content of the water-soluble form increases and the total amount decreases due to incomplete reaction. orthophosphate dehydration. So, with a molar ratio of urea: ammonium orthophosphate 0.75: 1, the product contains 70.8%. 42.4% P About water-soluble.
Продукт, получаемый, в выбранном интервале соотношений мочевина: :ортофосфат аммони 1-1,2:1, вл етс чистым полифосфатом аммони и содержит 72% PS-SOBUI,- растворимой в воде форме менее 15%.The product obtained in the selected range of ratios urea: ammonium orthophosphate 1-1.2: 1 is pure ammonium polyphosphate and contains 72% PS-SOBUI, in water-soluble form less than 15%.
Выбранный интервал значений соотноиени рециркулируемого продукта к исходной смеси позвол ет получать полифосфат аммони в виде сыпучего продукта, что характеризует повышенное содержание в нем фосфора. При отношении продукта к смеси меньшем, чем 0,8:1 наблюдаетс налипание продукта на стенки аппарата, а при отношении, большем, чем 1,4:1 ведеThe selected range of values for the ratio of the recirculated product to the initial mixture allows to obtain ammonium polyphosphate in the form of a granular product, which characterizes the high content of phosphorus in it. When the ratio of the product to the mixture is less than 0.8: 1, sticking of the product to the walls of the apparatus is observed, and at a ratio greater than 1.4: 1,
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772540712A SU710927A1 (en) | 1977-11-09 | 1977-11-09 | Method of preparing ammonium polyphosphate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772540712A SU710927A1 (en) | 1977-11-09 | 1977-11-09 | Method of preparing ammonium polyphosphate |
Publications (1)
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SU710927A1 true SU710927A1 (en) | 1980-01-25 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU772540712A SU710927A1 (en) | 1977-11-09 | 1977-11-09 | Method of preparing ammonium polyphosphate |
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SU (1) | SU710927A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0721918A3 (en) * | 1995-01-12 | 1996-12-11 | Chisso Corp | Process for producing ammonium polyphosphate of crystalline form II |
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1977
- 1977-11-09 SU SU772540712A patent/SU710927A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0721918A3 (en) * | 1995-01-12 | 1996-12-11 | Chisso Corp | Process for producing ammonium polyphosphate of crystalline form II |
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