金属シアノ錯化合物の423K以下での湿式加熱分解特性 Hydrothermal Decomposition Behavior of Metal Cyanide Complexes below 423K

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Hydrothermal decomposition of NaCN, Na<sub>2</sub>[Zn(CN)<sub>4</sub>] and Na<sub>3</sub>[Cu(CN)<sub>4</sub>] (particulary, Na<sub>2</sub>[Cu(CN)<sub>3</sub>]) in aqueous solution using a batch-type autoclave was investigated at the temperature range of 373K to 423K, under pressurized condition of 1 MPa. The initial CN concentration in the sample solution was set at 1g dm<sup>−3</sup>. As a results, it was found that the rate of CN decomposition in NaCN solution increased with an increase in the temperature. The decomposition rate was found to be expressed by first-order reaction kinetics. For the metal cyanide complexes, the rate of CN decomposition increased in the following order Cu < Zn < Na, which was attributed to a decrease in the stability constant of metal cyanide complexes in the same order. It was recognized that the reaction products of formic acid, ammonia, and carbonate were formed in the decomposition of NaCN and Na<sub>2</sub>[Zn(CN)<sub>4</sub>] in the experimental condition.By contrast, formic acid, ammonia, carbonate, nitrous acid, and nitrogen were produced by the decomposition of Na<sub>3</sub>[Cu(CN)<sub>4</sub>]. Furthermore, it was found that the metal ions of Cu and Zn were precipitated as insoluble CuO and ZnO, respectively.<br>

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  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 58(1), 38-44, 2007-01-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10018703779
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    8658938
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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