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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。
The effects of silica gel-polyamine resin from nickel sulfate electrolyte on the ion exchange column in simulated nickel sulfate electrolyte with Ni2 + 70g / L, Cu2 + 0.5-2.0g / L, pH = 1-4 and temperature 20-60 ℃ were studied. In-depth purification of copper in the process. With H2SO4 concentration of 1.0, 1.5, 2.0mol / L of the analytical solution to examine the analytical performance of the resin. The results showed that with the increase of feed solution pH and the increase of temperature, the exchange capacity of resin to copper increased and Cu2 + concentration of feed solution had little effect on the exchange capacity. The optimum adsorption conditions for the feed liquid pH = 4, adsorption contact time 30min, temperature 60 ℃. The optimal conditions for the analysis of H2SO442mol / L, contact time analysis of 40min. Under optimum conditions, the copper leakage and saturation exchange capacity of the resin were 0.378 and 0.496 mmol / mL-wet resin respectively, and the peak concentration of copper analyte was above 38 g / L.