N,N′-二(十二烷基)乙二胺二乙酸萃取分离铜  

Extraction Separation of Copper(Ⅱ) by N,N′-Didodecyl(ethylenediamine diacetic acid)

作　　者：杜巧云[1] 王建革[1] 吉苏宁[1] 

机构地区：[1]洛阳师范学院化学系,洛阳471022

出　　处：《应用化学》2003年第8期764-767,共4页Chinese Journal of Applied Chemistry

摘　　要：研究了N ,N′ 二 (十二烷基 )乙二胺二乙酸的氯仿溶液对铜的萃取行为 ,考察了初始水相酸度、萃取剂浓度及温度对Cu(Ⅱ )萃取率的影响。结果表明 ,在pH≥ 6条件下对Cu(Ⅱ )有很高的萃取率 ,且在一定范围内随萃取剂浓度增大和温度升高萃取率均增大 ;用摩尔比法和电导法测得萃合物中Cu2 + 与萃取剂的摩尔比为 1∶1;控制pH =6能使Cu(Ⅱ )与常见过渡金属离子Fe(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Mn(Ⅱ)得到分离。Extraction behaviour of N,N ′ didodecyl(ethylenediamine diacetic acid)(H 2R 2Y) in chloroform for Cu(Ⅱ) has been investigated as function of acidity of the initial aq. phase, concentration of extractant and extraction temperature. The extraction ratio was found to be increased with concentration of H 2 R 2 Y and temperature. The highest extraction ratio of Cu (Ⅱ) has been achieved at pH≥6. The mole ratio of Cu 2+ to ligand in extracted species was 1∶1 as determinated by conductivity and mole ratio method. The extration system is efficient for separation Cu (Ⅱ) from transition metals such as Fe(Ⅱ)?Co(Ⅱ)?Ni(Ⅱ)? Zn(Ⅱ)?Mn(Ⅱ) when pH=6.

关 键 词：N N'-二(十二烷基)乙二胺二乙酸 萃取分离 螯合 铜 

分 类 号：O652.62[理学—分析化学]