新型羧酸类萃取剂仲壬基苯氧基乙酸萃取UO_2^(2+)的性能研究  

Research on extraction of UO_2^(2+) by sec-nonylphonoxy acetic acid

作　　者：雷云逸[1] 包伯荣[1] 乌东北[2] 徐引娟[1] 付继芳[1] 

机构地区：[1]上海大学理学院化学系,上海200444 [2]同济大学化学系,上海200092

出　　处：《铀矿冶》2008年第2期102-105,共4页Uranium Mining and Metallurgy

摘　　要：研究了一种新型羧酸类萃取剂仲壬基苯氧基乙酸在硝酸体系中对铀(Ⅵ)的萃取性能及机制。考察酸度、萃取剂浓度等条件对萃取率的影响。试验发现,0.01 mol/L CA-100在pH 3.0~4.0之间萃取效果明显。pH为3.85时能够100%萃取铀。利用红外光谱分析了萃合物成键特性,证明COO—参与了配位,萃取反应机制为阳离子交换反应,并提出了酸性条件下萃取反应方程式。The extraction behavior and mechanism of UO2^2＋ by sec-nonylphonoxy acetic acid（CA-100） is reported. The influence of acidity of aqueous phase and extractant concentration on extraction is examined. The experiments found that at pH 3.0-4.0 and 0.01 mol/L CA-100 the extraction proceeds very well. The extraction reached 100% at pH 3. 85. The bonding mode was analyzed by infrared spectrum analysis. It is shown that COO-is involved in the bonding and extraction mechanism is anion exchange reaction. The equation of extraction reaction at acidic condition is also presented.

关 键 词：仲壬基苯氧基乙酸 UO2^2+ 萃取 

分 类 号：O614.62[理学—无机化学]