二(2,4,4-三甲基戊基)膦酸从盐酸介质中萃取分离钪(Ⅲ)和铁(Ⅲ)  

Extraction Separation of Scandium(Ⅲ) and Iron(Ⅲ) From Hydrochloric Acid Solutions With Bis (2, 4, 4-trimethylpentyl)phosphinic Acid

作　　者：马根祥[1] 李德谦[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《分析化学》1992年第10期1113-1116,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金

摘　　要：本文研究了二(2,4,4-三甲基戊基)膦酸(HBTMPP)的正辛烷溶液对Sc(Ⅲ),Fe(Ⅱ)的萃取平衡影响,研究了酸度对Sc(Ⅲ)、Fe(Ⅲ)分配比影响,探讨了Sc(Ⅲ)和Fe(Ⅲ)的分离可能性。用斜率法确定了萃合物组成和萃取反应机理,并研究了萃合物的IR、NMR谱,求得了萃取反应的平衡常数和热力学函数。The extraction of Sc(Ⅲ) and Fe(Ⅲ) from HCI solutions with bis(2,4,4-trime-thylpentyl)phosphinic acid has been investigated. The effects of acidity and temperature on the extraction of Sc(Ⅲ) have been studied. The results show that quantitative separation of Sc(Ⅲ) and Fe(Ⅲ), Lu(Ⅲ), Th(Ⅳ) can be easily attained through controlling the acidity condition. The composition of extracted complex has been determined by the method of slope analysis and extraction reaction can bc expressed as follows:Sc^(3+)+ 3(HA)_2 (o)(?)Sc(HA_2)_3 (o) + 3H^+The equilibrium constant and thermodynamic functions of extraction reaction have been calculated too. The IR, NTMR spectra of extracted complec have also been studied.

关 键 词：钪 铁 萃取分离 HBTMPP 膦酸 

分 类 号：O614.321[理学—无机化学]