N,N,N′,N′-四异丁基-3-氧戊二酰胺对钼(Ⅵ)的萃取

STUDY ON THE EXTRACTION OF MOLYBDENUM(Ⅵ) WITH N,N,N′,N′-TETRAISOBUTYL-3-OXA-PENTANEDIAMIDE

摘要: 研究了N,N,N′,N′ 四异丁基 3 氧戊二酰胺(TiBOPDA) 40%正辛醇/煤油溶液从HNO3溶液中萃取Mo(Ⅵ)的行为。实验结果表明,温度对Mo(Ⅵ)的萃取分配比影响很小,萃取过程无明显热效应。在HNO3浓度为1mol/L时,Mo(Ⅵ)以MoO2+2形式被萃取,MoO2(NO3)2与TiBOPDA形成配位比为1∶2的配合物,TiBOPDA萃取Mo(Ⅵ)为中性配合萃取。文章给出了萃取平衡方程式。

Abstract: By using 40% noctanol and kerosene as diluent, the extraction behavior of molybdenum(Ⅵ) with N,N,N′,N′tetraisobutyl3oxapentanediamide(TiBOPDA) from nitric acid solution is studied. Varations of temperature have nearly no effect on the distribution ratio of molybdenum(Ⅵ). There is no obvious heat effect in the extraction process. From 1 mol/L HNO3 solution, molybdenum(Ⅵ) is extracted in the form of MoO2+2. The composition of the extraction complex is MoO2(NO3)2·2 TiBOPDA. The extraction mechanism is attributed to the neutral complexation extraction. The extraction equilbrium can be expressed as follows:MoO2+2+2NO-3+2TiBOPDA(o)MoO2(NO3)2·2TiBOPDA(o)