Production of Boric Acid from Microwave-Dehydrated Ulexite Waste by Oxalic Acid Solution Leaching

Year 2020, Volume: 12 Issue: 1, 106 - 112, 31.01.2020

Feray Koçan , Salih Bayça

https://doi.org/10.29137/umagd.550013

Abstract

Abstract

An investigation was made of the production of boric acid from microwave-dehydrated ulexite waste by leaching with oxalic acid solution. An ulexite waste sample was dehydrated in a domestic microwave oven, and then dissolved in oxalic solution at temperatures of between 25 and 70°C. The experimental data from this dissolution process were analyzed using homogeneous and heterogeneous kinetic models, and the leaching kinetics of the microwave-dehydrated ulexite waste were defined. The activation energy of the oxalic acid solution of the microwave-dehydrated ulexite waste was also calculated.   Öz Mikrodalga ile dehirate edilmiş uleksit atığından borik asidin oksalik asit çözeltisi liç yoluyla üretilmesi incelenmiştir. Üleksit atık numunesi, ev tipi bir mikrodalga fırında dehidrate edilmiştir. Mikrodalga ile dehirate edilmiş uleksit atığı, oksalik çözeltilerde 25 ila 70 °C arasındaki bir sıcaklıkta çözülmüştür. Bu çözünme işleminin deneysel verileri homojen ve heterojen kinetik modeller kullanılarak analiz edilmiş ve mikrodalga-dehidre edilmiş uleksit atığının çözünme kinetiği belirlenmiştir. Mikrodalga-dehidre edilmiş uleksit atığının oksalik asit çözeltisinin aktivasyon enerjisi de hesaplanmıştır.

Keywords

Boric acid, microwave-dehydrated ulexite waste, dissolution, leaching kinetics

References

• Alkan, M., Cifci, C., Ayaz, F. Dogan, M. (2000). Dissolution kinetics of ulexite in aqueous EDTA solutions. Canadian Metallurgical Quarterly, 39, 433-440.
• Abali Y., Bayca S.U., Mistincik E. (2011). Leaching kinetics of ulexite in oxalic acid. Physicochemical Problems of Mineral Processing, 47, 139 – 148.
• Alkan, M., Kocakerim, M.M. (1987). Dissolution Kinetics of Ulexite in Water Saturated by Sulphurdioxide. Journal of Chemical Technology and Biotechnology. 40, 215-222,
• Bayca, S.U. (2009). Effects of the addition of ulexite to the sintering behavior of a ceramic body. Journal of Ceramic Processing Research, 10, 162–166.
• Bayca, S.U., Kocan, F. Abali, Y. (2014). Investigation of Leaching Kinetics of Ulexite Waste in Oxalic Acid Solutions. Chemical and Biochemical Engineering Quarterly, 28 (3) 273–280.
• Brotherton, R.J. (1995). Boron, Encyclopedia of inorganic chemistry volume 1, New York, John Wiley and Sons.
• Demirkiran, N. (2009). Dissolution kinetics of ulexite in ammonium nitrate solutions. Hydrometallurgy, 95, 198–202.Dogan T., Yartasi, A. (2009). Kinetic investigation of reaction between ulexite ore and phosphoric acid. Hydrometallurgy, 96, 294-299.
• Ekmekyapar, A., Kunkul, A., Demirkiran N. (2012). Kinetic Investigation of Reaction Between Mineral Ulexite and Citric Acid. Mineral Processing and Extractive Metallurgy Review, 31, 250 – 255.
• Kunkul, A., Yapici, S., Kocakerim, M.M., Copur, M. (1997). The dissolution kinetics of ulexite in ammonia solutions saturated with CO2. Hydrometallurgy, 44, 135–145.
• Kunkul, A., Tunc, M., Yapici, S., Ersahan, H., Kocakerim, M.M. (2013). Dissolution of thermally dehydrated ulexite in sulphuric acid solution. Transactions of Nonferrous Metals Society of China, 23, 1797–1803.
• Koklu, M., Ozyetis, O., Maraslioglu, D., Yavuklu E., Celen, B., Tufan T., Gunduz, M. (2003). Developments in analyzes of cal-cium borate. (in Turkish), 18 International Mining Congress and Exhibition of Turkey, 10 – 13 June, Antalya, pp. 141 – 146.
• Kunkul, A., Tunc, M., Yapici, S., Ersahan, H., Kocakerim, M.M. (1997). Dissolution of thermally dehydrated ulexite in sulphuric acid solution. Industrial & Engineering Chemistry Research, 36, 4847–4851.
• Levenspiel O. (1999). Chemical Reaction Engineering, New York, John Wiley and Sons.
• Smith, R.A., McBroom, R.B. (1992). Boron Compouns, Kirk othmer Encyclopedia of Chemical Technology vol 4, New York, John Wiley and Sons.
• Tunc, M., Kocakerim, M.M., Yapici, S., Bayrakceken, S. (1999). Dissolution mechanism of ulexite in H2SO4 solution. Hydrometallurgy, 51, 359–370.