摘要
采用Lix984作萃取剂,煤油作稀释剂混合而成溶液萃取的有机相,从含Ni^(2+),Fe^(3+),Mg^(2+)离子的硫酸盐溶液中萃取分离Cu^(2+).实验结果表明,在一定范围内,铜萃取率随萃取剂浓度的升高、相比的增加、萃取时间的延长、初始水相pH值的增加、萃取温度的升高以及搅拌时间的延长而增加.本实验的优化条件为萃取剂体积分数达60%,相比为O∶A=2∶1,萃取时间为16 min,萃取初始水相pH值为2.5,萃取温度在25~45℃之间,搅拌速度为240 r/min.在最佳条件下,铜萃取率高达95.55%.Fe^(3+)萃取率为8.82%,Ni^(2+)的萃取率为5.47%,Mg^(2+)的萃取率为2.36%.从而达到Cu^(2+)与其它金属离子有效分离的效果.
Taken Lix984 as an organic phase extraction agent, kerosene as a diluent for the solvent extraction, extraction of Cu2+ was conducted via sulfates solution containing Fe3 + , Mg2 + and Ni2 + . The experimental results showed that in a certain range, copper extraction ratio increases with extractant concentration, the extraction time, the initial pH value, extraction temperature and stirring time. The optimum of conditions are: the extractant concentration is up to 60% , the phase ratio of organic phase to aqueous one is 2 : 1, the extraction time is 16 min and the initial aqueous phase pH value is 2. 5. Under the optimum conditions, the extraction ratio of Cu2+ reaches 95. 55% , that of Fe3+ is only 8. 82% , that of Ni2+ is 5. 47% , and that of Mg2+ is 2. 36% . It is believed that the extraction process can realize separation of Cu2 + from the other ions.
出处
《材料与冶金学报》
北大核心
2017年第3期186-190,共5页
Journal of Materials and Metallurgy
基金
国家重大科技专项973项目(2014CB643405)
关键词
萃取分离
铜镍铁镁离子混合液
Lix984
extraction separation
mixed solution o f Cu2+ , Fe3+ , Ni2+ and Mg2+
Lix984