Reductive acid leaching of manganese dioxide with glucose: Identification of oxidation derivatives of glucose |
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| Affiliation: | 1. Dept. of Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, India;2. Dept. of Mechanical Engineering, NMAM Institute of Technology, Nitte 574 110, India;3. Dept. of Chemistry, Rani Channamma University, Belagavi 591 156, India;1. College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China;2. National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai 200237, China;3. Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China;4. Faculty of Engineering, The University of Tokyo, 113-8656, Japan;5. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;1. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, PO Box 11155/4563, Tehran, Iran;2. Iran Zinc Mines Development Company, Bafgh Zinc Smelting Company, Iran;1. Technical University of Kosice, Faculty of Metallurgy, Institute of Recycling Technologies, Letna 9, 042 00 Kosice, Slovakia;2. Flemish Institute for Technological Research (VITO), Unit Sustainable Materials Management, Boeretang 200, 2400 Mol, Belgium |
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| Abstract: | The oxidation of glucose during the reductive leaching of pure MnO2 and manganese ore in sulphuric acid at 90 °C MnO2 was investigated. The aim was to identify the derivatives and the chemical pathway of glucose oxidation. Organic derivatives were monitored by HPLC using an Aminex HPX-78H column and UV detection. Chromatographic patterns of leaching solutions showed that major compound formed was formic acid. Minor quantities of glycolic, glyceric and traces of gluconic acids were identified. Results suggest that during the leaching reaction, the carbon chain of glucose is shortened by detachment of one carbon atom as formic acid. |
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