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OALib Journal期刊
ISSN: 2333-9721
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磷酸三丁酯及烷基氧化膦萃取铂族金属氯络酸的机理
, PP. 235-244
Abstract:
本文考察了TBP萃取Pt(Ⅳ),Pd(Ⅳ),Ir(Ⅳ),Pt(Ⅱ),Pd(Ⅱ),Rh(Ⅲ),Ir(Ⅲ)等7种氯络酸时,HCl浓度对分配系数的影响,进行了TBP与TAPO的对比实验;研究了萃取有机相的可见及红外光谱以及H_2SO_4和HClO_4对萃取的影响.认为萃取属于氢离子的水化溶剂化机理;推导了萃取能量变化公式;解释了实验获得的MCl_6~(2-)>MCl_4~(2-)>MCl_6~(3-)规律及“最小电荷密度原理”,并根据从反应平衡式导出的分配系数近似式,解释了分配曲线中存在峰值的原因和H_2SO_4助萃作用以及HClO_4抑萃作用的原因.
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