Effects of Metal Ions on the Stability of Sodium Bromite Aqueous Solution

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  • KAGEYAMA Toshifumi
    Department of Industrial Chemistry, Faculty of Engineering, Kanto-Gakuin University
  • IMAMURA Hideo
    Department of Industrial Chemistry, Faculty of Engineering, Kanto-Gakuin University
  • UENO Yoshio
    Research Laboratory of Resources Utilization, Tokyo Institute of Technology
  • OKAWARA Makoto
    Research Laboratory of Resources Utilization, Tokyo Institute of Technology

Bibliographic Information

Other Title
  • 亜臭素酸ナトリウム水溶液の分解におよぼす金属イオンの影響
Published
1983-07-10
DOI
  • 10.1246/nikkashi.1983.999
Publisher
The Chemical Society of Japan

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Description

Stability of sodium bromite (NaBrO2) aqueous solution was studied by means of chemical and UV spectral analyses. NaBrO2 aq. soln. hardly decomposed in the presence of Br-, Cl-(by-products of NaBrO2) and BrO2- (decomposition product of NaBrO2) at.70°C and pH 13. However, NaBrO2 aq. soln. gradually decomposed by addition of metal ions such as Fe+, Ni2+, Cu2+ and Al3+.<BR>The X-ray diffraction study and chemical analysis of decomposition products of NaBrO2 by copper ions showed existence of CuO, CuBr2, Br2O2 and hence following reactions are suggested.<BR>It was considered that these reactions simultaneously proceeded for CuBr2 was soluble and CuO was slightly soluble in strong alkaline soln. This paper has also revealed that pure NaBrO2 aq. soln. at pH 13 is stable at 95°C for 6 h and could be condensed to crystallize NaBr02·3 H2O.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1983 (7), 999-1002, 1983-07-10

    The Chemical Society of Japan

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