EDTA的酰氯化

Chlorization of EDTA

阐述了对 EDTA进行酰氯化的目的 ,用不同的方法合成了一种新物质——乙二胺四乙酰氯 (简称 EDTA酰氯 ) ,并对产物进行了鉴定和表征 .将合成的 EDTA酰氯与聚乙二醇 60 0 0 (PEG60 0 0 )和吐温 80 (Tween80 )在 N,N 二甲基甲酰胺存在下反应制得了修饰聚合物 PEG EDTA和Tween EDTA.并将所得产物用于构建修饰聚合物盐水液固萃取体系富集分离 Cu( ) ,在 p H=5 .4 0 ,Tween80和 (NH4) 2 SO4的浓度分别为 9% (体积百分比 )和 2 0 % (质量体积百分比 )的条件下 ,两修饰物对 Cu( )的一次萃取率分别为 89.68% (PEG- EDTA)和 81.5 4% (TweenEDTA)

Chlorization is one of the important methods used to improve the reactivity of carboxylic acids. In this article, the purpose of chlorization was elaborated, and a new substance, chloride of EDTA, was synthesized in two ways and identified by IR and other means. When the new substance reacted with PEG 6000 or Tween80 in the presence of NDimethyl formamide,modified polymers were obtained. Moreover, good results were achieved when we used the modified polymers in the polymersaltwater liquidsolid extraction system to concentrate and separate Cu(Ⅱ) under the condition of pH 5.40, 9 % Tween80 (V/V) and 20 % (NH 4) 2SO 4 (W/V).