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Oxidation of brown coal of Angren deposit with a mixture of nitric and sulfuric acids

  • Echnology of Organic and Inorganic Chemistry
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Abstract

Oxidation of brown coal of Angren deposits by a mixture of nitric and sulfuric acids was studied in respect of dependence on the concentration of nitric acid (5–30%), concentration of sulfuric acid in nitric acid solution (2.5–20%), and temperature (40–80°C) at the process duration 2 h and the ratio of coal: HNO3 = 1: 2. Optimal conditions of the process in terms of maximum yield of humic acids and the minimum loss of nitrogen oxides were found.

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Authors and Affiliations

  1. Institute of General and Inorganic Chemistry, Uzbekistan Academy of Sciences, Tashken, Uzbekistan

    M. O. Zhumanova, N. Usanboev, S. S. Namazov & B. M. Beglov

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  1. M. O. Zhumanova
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  2. N. Usanboev
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  3. S. S. Namazov
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  4. B. M. Beglov
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Additional information

Original Russian Text © M.O. Zhumanova, N. Usanboev, S.S. Namazov, B.M. Beglov, 2009, published in Khimicheskaya Promyshlennost’, 2009, Vol. 86, No. 5, pp. 217–225.

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Zhumanova, M.O., Usanboev, N., Namazov, S.S. et al. Oxidation of brown coal of Angren deposit with a mixture of nitric and sulfuric acids. Russ J Appl Chem 82, 2223–2229 (2009). https://doi.org/10.1134/S107042720912026X

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  • DOI: https://doi.org/10.1134/S107042720912026X

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