A study on copper ferrite dissolution in sulphuric acid.

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Other Title
  • 硫酸水溶液中における銅フェライトの溶解挙動に関する研究
  • リュウサン スイヨウエキチュウ ニ オケル ドウ フェライト ノ ヨウカイ キ

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Abstract

In this research, dissolution of the synthesized copper ferrite in aqueous sulphuric acid was investigated where temperatures were varied from 323 K to 343 K, sulphuric acid concentration from 1 M to 3 M and experiment was done using a rotating disc system Effects of Fe3+, Fe2+ and SO42-were also studied. The experimental results have shown that, in the initial period of dissolution, rate of copper was greater than one of iron, leaving Fe203layer outside, and therefore, non stoichiometric dissolution of copper and iron. After long time of dissolution period, the stoichiometric dissolution of copper and iron was shown to be attained as described as follows: CuFe2O4+8H+=Cu++2Fe3++4H2O<BR>Increases of temperature and acid concentration both lead to increase in dissolution rate of copper ferrite. However, increases in any of Fe3+, Fe2+ or SO42-decreased the dissolution rate, that has been discussed due to the decrease of hydrogen ion activity.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 105 (1), 49-54, 1989

    The Mining and Materials Processing Institute of Japan

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