【摘要】 合成了N-正丁基异辛酰胺(BiOA),并对其从盐酸介质中萃取Pt(IV)进行了研究。结果表明:待萃液Pt(IV)浓度为1.000g·L-1,HCl浓度为5mol·L-1时,用2.0mol·L-1N-正丁基异辛酰胺-5%TBP-正辛烷按相比(O/A)1:1混合萃取Pt(IV),经过5min的萃取振荡,萃取率可达99.5%。此萃取体系中TBP对Pt(IV)无协萃效应;水是载Pt(IV)有机相的有效反萃剂,反萃率可以达到90.3%。N-正丁基异辛酰胺萃取Pt(IV)的反应是放热反应,反应热为–10.52kJ·mol-1。红外光谱分析表明,在1mol·L-1~5mol·L-1的HCl范围内,N-正丁基异辛酰胺萃取铂的反应为酸性离子缔合萃取。萃取反应为:PtCl62-+2BiOA(0)+2H+→[(BiOAH+)2·PtCl62-](0)。更多还原

【Abstract】 N-butyl isooctylamide (BiOA) was prepared and characterized by IR, MS and H-NMR spectra. The performance of extracting platinum(IV) using N-butyl isooctylamide were investigated. Extraction percentage of Pt(IV) reaches to 99.5% from 5 mol·L-1 HCl with 2.0 mol·L-1 BiOA-5%TBP in octane. TBP was no synergistic extraction for Pt(IV) in this system. Water is efficient stripping reagent. The extraction reaction is an exothermic reaction and ?H =–10.52 kJ·mol-1. When HCl concentration ranges from 1.0 mol·L-1 to 5.0 mol·L-1, the reaction of extracting Pt(IV) was acid ion association extraction and the extraction equation was: PtCl62-+2BiOA(0)+2H+→ [ (BiOAH+)2·PtCl62- ](0)更多还原