HTTA和DAM协同萃取Ln(Ⅲ)及萃合物性质的研究  

Studies on Synergistic Extraction of Ln(Ⅲ) with HTTA DAM and Properties of Extracted Compounds

作　　者：刘志宏[1] 梁宏斌[1] 韩维和[1] 

机构地区：[1]陕西师范大学化学系,陕西西安710062

出　　处：《稀土》2000年第1期5-7,30,共4页Chinese Rare Earths

基　　金：北京大学稀土材料化学及应用国家重点实验室基金

摘　　要：研究了酸性配体HTTA和中性配体DAM的CHCl3溶液在HNO3介质中对Ln()的协同萃取。考察了萃取剂浓度、溶液酸度对萃取平衡的影响,确定了萃合物组成为Ln(TTA)3DAM,求得了La3+、Nd3+、Sm3+和Gd3+的半萃取pH12和萃取平衡常数Ks.e.。合成了固态萃合物,并用元素分析、红外光谱、差热-热重分析及荧光光谱等方法对其性质作了表征。The synergistic extraction of Ln(Ⅲ) from nitric acid solution with HTTA and DAM has been studied.The influences of extractant concentration and pH values on the extraction distribution ratio have been investigated.The composition of extracted compound was shown to be Ln(TTA) 3 DAM.The pH of semi extraction and extracting equilibrium constant of La 3+ ,Nd 3+ ,Sm 3+ and Gd 3+ have been obtained.The extracted compounds have been synthesized and characterized by elemental analysis,IR,TG and fluorescence spectra.

关 键 词：协同萃取 HTTA DAM 萃合物 稀土离子 溶剂萃取 

分 类 号：O614.33[理学—无机化学] O652.62[理学—化学]