摘要
研究Ｎ，Ｎ，Ｎ’，Ｎ’－四丁基丁二酰胺（ＴＢＳＡ）以５０％煤油－５０％，２，４－三甲苯为稀释剂，从硝酸介质中萃取硝酸和铀（Ⅵ）的机理，得出萃合物的组成为ＵＯ_２（ＮＯ_３）·ＴＢＳＡ，借助红外光谱分析萃合物的结构。在１．０ｍｏｌ／Ｌ的硝酸中，ＨＮＯ_３与ＴＢＳＡ的加合物主要为ＨＮＯ_３·ＴＢＳＡ；在较高的硝酸浓度下（３．０ｍｏｌ／Ｌ），ＨＮＯ_３与ＴＢＳＡ的加合物不但有ＨＮＯ_３·ＴＢＳＡ，而且还有ＨＮＯ_３·（ＴＢＳＡ）_２和（ＨＮＯ_３）２·ＴＢＳＡ的存在。计算出萃取反应的表观平衡常数及热力学函数。
The extraction mechanisms of HNO_3 and U (Ⅵ) with TBSA in 50% kerosene-50% 1, 2, 4-trimethylbenzene from nitric acid medium have been studied. The composition of extracted species is UO_2(NO_3)_2·TBSA, and the structure of the extracted complex was analyzed by IR spectrometry. At 1.0mol/L HNO_3, the main extraction adduct of HNO_3 and TBSA is HNO_3·TBSA. TBSA·HNO_3, (TBSA)_2·HNO_3 and TBSA·(HNO_3)_2 are formed at high acidity (3.0mol/L HNO_3). The apparent equilibrium constants of extraction reactions and values of thermodynamic function have been calculated.
出处
《有色金属》
CSCD
2000年第2期65-67,共3页
Nonferrous Metals
基金
国家自然科学基金!(29281001)
关键词
四丁基丁二酰胺
硝酸
萃取
N, N, N', N' - tetrabutylsuccinylamide (TISA), uranium(Ⅵ)
extraction mechanism
