The "overcondensation" of phosphate ions and the formation of conjugate metal oxide upon the thermal dehydration-condensation of hydrogenorthophosphates.
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概要
- 論文の詳細を見る
On the thermal reaction of H<SUB>3</SUB>PO<SUB>4</SUB> or NH<SUB>4</SUB>H<SUB>2</SUB>PO<SUB>4</SUB> with metal salts, such as Na<SUB>2</SUB>CO<SUB>3</SUB> or Mg(OH)<SUB>2</SUB>, the "overcondensation" of the phosphate anions and the conjugate formation of metal oxide were observed. The "overcondensation" was defined as a formation reaction of the phosphate with a larger polymerization degree than that of the product to be expected from the [MO or M<SUB>2</SUB>O]/[P<SUB>2</SUB>O<SUB>5</SUB>] mole ratio of the starting mixtures. The "overcondensed" tetrametaphosphate and the conjugate oxide, magnesium oxide, were detected on the thermal condensation of MgHPO<SUB>4</SUB>·3H<SUB>2</SUB>O and of a mixture of NH<SUB>4</SUB>H<SUB>2</SUB>PO<SUB>4</SUB> or H<SUB>3</SUB>PO<SUB>4</SUB> and Mg(OH)<SUB>2</SUB>. The "overcondensed" tripoly- and trimeta-phosphate were found in the course of the formation reaction of Na pyrophosphate from a mixture of Na<SUB>2</SUB>CO<SUB>3</SUB> and NH<SUB>4</SUB>H<SUB>2</SUB>PO<SUB>4</SUB>.
- 公益社団法人 日本化学会の論文
著者
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Ametani Kazuo
Tokyo Metropolitan Isotope Research Center
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Kawazoe Hiroshi
Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University
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Imai Masahiko
Tokyo Metropolitan Isotope Research Center
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Kanazawa Takafumi
Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University
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