Separation of nickel, cobalt and copper by solvent extraction with P204
来源期刊：中国有色金属学报(英文版)2001年第5期
论文作者：钱东 王开毅 蔡春林 潘春跃 唐有根 蒋金枝
文章页码：803 - 805
Key words：non-equilibrium solvent extraction; equilibrium solvent extraction; nickel; cobalt; copper; di(2-ethylhexyl) phosphate
Abstract: Nickel, cobalt and copper were separated by solvent extraction with P204. The experimental results show that ［Co(NH3)6］3+ is an inert complex in extraction kinetics, therefore cobalt can be separated from nickel and copper by non-equilibrium solvent extraction. Under the conditions of temperature 25℃,contact time of two phases 10min, phase ratio 1∶1, aqueous pH 10.10 and concentration of P204 20%,［Co(NH3)6］3+ is hardly extracted by P204, while the percentage extractions of nickel and copper are 79.3%and 93.9% respectively. Nickel and copper are separated by equilibrium solvent extraction with P204. Under the conditions of temperature 25℃,contact time of two phases 1 min,phase ratio 1∶1, equilibrium pH 4.01 and concentration of P204 20%,the separation factor of copper and nickel is 216.
