Thermal Decomposition of Ammonium Amidotriphosphate (NH4)4P3O9NH2H2O.
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概要
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Ammonium amidotriphosphate (NH<SUB>4</SUB>)<SUB>4</SUB>P<SUB>3</SUB>O<SUB>9</SUB>NH<SUB>2</SUB>·H<SUB>2</SUB>O was heated at 5 K min<SUP>−1</SUP> up to 100, 145, 180, and 240 °C in four different atmospheres: in a stream of dry air, humid air, ammonia, and dry hydrogen chloride. The products were analyzed by HPLC-FIA, X-ray diffractometry, and IR spectrophotometry. A new phase of ammonium <I>cyclo</I>-triphosphate was observed at lower temperatures, except for in the ammonia atmosphere. Oligophosphates (chain length=4–12) were more abundant in samples heated to 145 and 180°C in hydrogen chloride. The <I>cyclo</I>-tri- and oligophosphates were most probably formed via a zwitterion form. When heated to 240°C, the samples were changed to ammonium polyphosphates. Elemental analyses for the sample heated to 240°C in dry air showed that the ammonium polyphosphates formed contained some phosphorus-nitrogen bonds. Isothermal experiments at 180°C in dry air indicated that the new phase of ammonium <I>cyclo</I>-triphosphate was converted completely to ammonium polyphosphates.
- 公益社団法人 日本化学会の論文
著者
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NARIAI Hiroyuki
Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University
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MOTOOKA Itaru
Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University
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Takenaka Atsushi
Department Of Urology Hyogo Medical Center For Adults
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Ooe Junichi
Department of Industrial Chemistry, Yonago National College of Technology
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Takenaka Atsushi
Department of Industrial Chemistry, Yonago National College of Technology
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