Elimination of Aluminum in Nickel-Cobalt-Manganese Sulfate Solution

The separation of aluminum from nickel, cobalt and manganese in complexation-precipitation systems was studied. The relationships between metal ion concentration and p H value in the systems of Me-OH-and Me-OH--NH3 were simulated by thermodynamic calculation. Aluminum was eliminated of by hydrolysis-precipitation method. The results showed that separation of aluminum from nickel, cobalt and manganese in sulfate solution was effective in the Me-OH--NH3 and Me-OH--NH3-CO32-systems. When the p H value was 4.5, the recovery rate of nickel, cobalt and manganese was 98.57%, 99.63% and 99.91%, respectively, and the removal rate of aluminum 99.94%.