摘要
对Cyanex923(925)/[C8mim][PF6]和TBP/[A336][NO3]两个离子液基体系在萃取Sc(Ⅲ)中的应用进行了研究。实验表明,由于空间位阻较小,Cyanex923在[C8mim][PF6]中对Sc(Ⅲ)的萃取能力明显优于Cyanex925。温度对Cyanex923/[C8mim][PF6]体系萃取Sc(Ⅲ)的影响较小。与[C8mim][PF6]相反,[A336][NO3]在水中的浓度随酸度增加逐步减少。TBP/[A336][NO3]对Sc(Ⅲ)具有较高的萃取率。
Two RTIL-based systems of Cyanex923 （925） / [ Csmim ] [ PF6 ] and TBP/[ A336 ] [ NO3 ] were studied for the Sc（ Ill ） extraction. As indicated by experiment, Cyanex923 demonstrated better extraction efficiency for Sc （ Ⅲ ） than Cyanex925 since the steric effect. In additional, the relationship of lgDso with temperature showed that temperature had little influence on the extraction process. In contrast to [ Csmim] [PF6], the concentration of [A336] [NO3] in aqueous phase decreased as the acidity increased. TBP/ [A336] [ NO3 ] indicated higher extraction effciency for Sc（ Ⅲ ）.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2007年第4期417-421,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(50574080)
中国科学院百人计划资助项目
2006年吉林省杰出青年科学研究计划(20060114)资助项目
关键词
室温离子液
离子液基萃取
钪
room temperature ionic liquids
RTIL-based extraction
Scandium（ Ⅲ ）
