离子液体[Emim]PF_6-邻菲咯啉萃取回收废旧电池中镉、镍离子的研究

Studies on extraction of nickel and cadmium ions in used batteries with ionic liquid PF_6-phenanthroline

研究了疏水性离子液体[Emim]PF6-邻菲咯啉萃取体系对废旧镍镉电池中镉、镍离子的萃取性能,考察了振荡时间、温度、平衡水相酸度和萃取剂用量对萃取性能的影响。在水相pH值为5.91、温度为80℃时,4.0mL4g/L的邻菲咯啉与3.0mL离子液[Emim]PF6组成的萃取体系对废旧电池液中镉、镍离子萃取效果良好。同时研究了废旧离子液在不同时间及酸度下的反萃效果,在浓度为1.0mol/L的盐酸介质中反萃1h,镉、镍离子能较好地被反萃。

The extraction of nickel and cadmium in waste nickel-cadmium battery with hydrophobic ionic liquid PF6-phenanthroline was studied.The effects of the oscillation duration、temperature、the balance aqueous phase acidity and the extractant quantity on the extraction of nickel and cadmium were examined,respectively.The result showed that nickel and cadmium ions in waste nickel-cadmium battery could be extracted nicely in extraction system of 4.0 mL of 4g/L phenanthroline-3.0 mL of PF6,in an aqueous phase of pH 5.91,at a,temperature of 80℃ for 20 min of oscillation duration.The effect of back-extraction of used PF6 under different oscillation duration and acidic media was also researched,and it was found that the nickel and cadmium ions could be well back extracted in 1.0 mol/L hydrochloric acid medium when oscillation duration was one hour.