JFET_V12_N2_RP1 S.V.A.R. Sastry Journal on Future Engineering and Technology 2230 – 7184 12 2 1 8 Hydrometallurgical Treatment, Leaching, Manganese, Sulphuric Acid The current study assesses the prospect of selective leaching of Manganese (Mn) from complex, in a high temperature sulphuric acid medium. The factors affecting the sulphuric acid leaching of the manganese complex in presence of various parameters were investigated. The three variables studied were temperature of leaching medium, leaching o o time, and concentration of sulphuric acid. Experiments were carried out at temperature ranging from 40 C to 110 C, time from 30 minutes to 150 minutes and sulphuric acid concentration from 2% to 6%. The feed ratio is 1:3 (5g MnSO + 4 15g impurities). The feed prepared is in close resemblance to pyrolusite ore. Manganese leaching amount was measured by using the standard manganese concentration curve and estimated by titration method. Effects of various acid concentrations on leaching efficiency were studied. The optimum conditions established for maximum metal O extraction are: 100 C temperature, 120 minutes time, and 5% concentrated sulphuric acid. Under these conditions, recovery of Mn was 98%, and the leached residues were analyzed. The present process may find application of separation of manganese from iron and aluminium at high temperature during various hydrometallurgical treatment of manganese based ores. November 2016 - January 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=10360