Leaching of manganese from low-grade manganese ore using oxalic acid as reductant in sulphuric acid solution

Characterization of Sumbawa manganese ore and recovery of manganese sulfate as leaching products

“…Sulfuric leaching using SO 2 aqueous has been reported could extract 95% of manganese [6]. Hydrometallurgy method for manganese ore using sulfuric acid and oxalic acid, 98.4% of manganese has been succeeded to leach [7]. Study of peroxide addition as reductor agent to manganese leaching resulted in 92% manganese.…”

Correlation among physical and electrochemical behaviour of nanostructured electrolytic manganese dioxide from leach liquor and synthetic for aqueous asymmetric capacitor

“…6,7 EMD can be formed from the direct electrolysis of an aqueous bath of manganese sulphate and sulphuric acid. Numerous reports [8][9][10][11] are available regarding the synthesis of EMD from various manganese ores and its use in energy storage applications. The possibility of producing EMD from low-grade and secondary manganese resources has not been fully explored.…”

Reductive Acid Leaching of Low Grade Manganese Ores

“…Manganese plays an important role in steel production, preparation of dietary additives, chemical production, in battery cells industry [4,5]. Various studies have been carried out for leaching of low grade manganese ore using sulphuric acid and oxalic acid [6,7], nitric acid [8], hydrochloric acid and citric acid [9] as reducing agent and high leaching efficiency, but the basic problem are the high temperature, residual acid generation, associated cost and environmental pollution [10]. Implementation of new technique in commercial hydrometallurgical process to recover metals is based on the acid leaching technique, is basically governed by the following equations [11][12][13] …”