Study on removing cobalt by β-naphthol in solution purification for zinc hydrometallurgy

The paper presents the behavior of impurity elements and effect of removing cobalt in the process byβ-naphthol.The process factors of removing cobalt was examined.The result showed that the removing cobalt is inefficient by -naphthol as the solution of zinc sulfate containing high-copper and high-cadmium.After the copper and cadmium were replaced by zinc powder, the effect of purifying cobalt was equal to those of zinc powder and antimony salt byβ-naphthol amount to 9～13 times as same as cobalt,The cobalt was remained under 0.5mg/L in the solution of zinc sulfate.