硅胶-聚合胺树脂在模拟硫酸镍电解液中深度净化除铜

用离子交换柱在Ni2+70g/L,Cu2+0.5～2.0g/L,pH=1～4,温度20℃～60℃的模拟硫酸镍电解液中研究硅胶-聚合胺树脂从硫酸镍电解液中深度净化除铜的过程.用H2SO4浓度分别为1.0,1.5,2.0mol/L的解析液考察树脂的解析性能.结果表明,随料液pH增大以及温度升高,树脂对铜的交换容量增大,料液Cu2+浓度对交换容量影响不大.最佳吸附条件为料液pH=4,吸附接触时间30min,温度60℃.最佳解析条件为H2SO42mol/L,解析接触时间40min.最佳工艺条件下,树脂的铜穿漏及饱和交换容量分别为0.378和0.496 mmol/mL-湿树脂,铜解析液峰值浓度可达38g/L以上.

Copper Completely Removal from Artificial Nickel Sulfate Electrolyte by Using Silica-polyamine Resin

The deep removing copper process from a artificial nickel sulfate electrolyte with the silica-polyamine resin is investigated in solution containing Cu2+ 0.5～2.0g/L and Ni2+ 70g/L with pH value 1～4 at temperature 20～60℃. Desorption performance is re-searched in dution solution containing H2SO4 1.0, 1.5 and 2.0 mol/L, respectively. The results show that the higher the pH and the temperature, the greater the exchange capacity of the resin. Cu2+ composition has less influence on adsorption. The optimal adsorption conditions are solution pH=4, contact time 30min and temperature 60℃. The optimal desorption condition is H2SO4 2.0 mol/L and con-tact time 40 min. The breakthrough exchange capacity and saturated exchange capacity of the resin for copper are 0.378 and 0.496 mmol/mL wet resin, respectively, the peak concentration of copper is over 38g/L in desorption solution.