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- Electric smelting and gaseous refining of cement-copper precipitate
- Deoxidation of blister copper by gaseous reduction
- Selective adsorption and recovery of sulfur dioxide from industrial gases by using synthetic zeolites
- Extraction of manganese from Georgia umber ore by a sulfuric acid-ferrous sulfate process (in two parts).
- Recovery of manganese from slag formed by selective oxidation of high-manganese pig iron
- Purification and concentration of a cyclic manganese leach solution by elevated pressure-temperature methods