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Present study evaluates the possibility of selective leaching of manganese from complex, in a high temperature sulphuric acid dissolution process. The factors affecting the sulphuric acid leaching of the manganese complex in presence of various parameters were investigated. Experiments were carried out at temperatures ranging from 40-110 deg.C, time from 30-150 minutes and sulphuric acid concentration from 2-6%. The ore prepared is in close resemblance to pyrolusite ore. The results show that as temperature of the medium increases, the percentage recovery of manganese increases. The optimum conditions established for maximum metal extraction are: 100 deg.C temperature, 2 hours time and 5% concentrated sulphuric acid. Under these conditions, recovery of Mn was 98%. The present process may find applications of separation of manganese from iron and aluminium at high temperature during various hydrometallurgical treatment of manganese based ores. This work is aimed for utilization byresearchers, industrialists' and traditional businesses. Apart from this it will be especially relevant and useful for the students of Metallurgy, Mining, Mechanical engineering and Chemical engineering.