N1923从铜SX-EW电解液中萃取除铁

Iron Removal from Copper SX-EW Electrolyte by N1923 Extraction

研究了采用萃取剂N1923从SX-EW电解液中萃取铁。在萃取过程中添加改质剂异辛醇能够有效改善萃取过程的分相性能。在萃取剂浓度为10%、萃取相比2/1时萃取性能较好,能够从含铁3 g/L的电积液中单级萃铁率达到60%,在萃取铁的过程中几乎不萃取其它元素,电积液的酸度对萃取影响较小。萃取铁后的负载有机相用2 mol/L氢氧化钠在相比为2/1时反萃效果较好,并且有机相的循环性较好。另外,萃取剂经由夹带进入SX系统对萃取铜几乎没有影响。

Extraction of iron from SX-EW electrolyte with extractant N1923 was investigated.The results show that addition of modifier isooctanol in extraction process can effectively improve the phase separation performance.When the concentration of extractant is 10% and phase ratio is 2/1,the extraction performance is better, and the single-stage extraction of iron can reach 60% from electrolyte containing 3 g/L Fe.In the process of iron extracting, almost no other elements in electrolyte are extracted, and the acidity of electrolyte has little effect on extraction.The loaded organic phase after iron extracting has better stripping effect with 2 mol/L NaOH and phase ratio of 2/1,and the circulation of organic phase is better.Furthermore, the extractant entrainment into SX system has little effect on copper extraction.