对M髤[M=Co,Ni and Cu]与L-多巴（L）和1,10-菲咯啉（X）在的1,4-二氧杂环己烷（DOX）-水混合物【0~60%（V/V）】三元配合物体系在（303.0±0.1）K和离子强度为0.16 mol.L-1情况下进行pH滴定。结果表明：对Co髤和Cu髤而言,三元物种...对M髤[M=Co,Ni and Cu]与L-多巴（L）和1,10-菲咯啉（X）在的1,4-二氧杂环己烷（DOX）-水混合物【0~60%（V/V）】三元配合物体系在（303.0±0.1）K和离子强度为0.16 mol.L-1情况下进行pH滴定。结果表明：对Co髤和Cu髤而言,三元物种为MLX2H,MLXH,ML2X和MLX,但对Ni髤而言,三元物种为MLX2H,MLXH和MLX。三元物种的稳定性和浓度随介质的介电常数的变化趋势根据静电和非静电力作出解释。同时还给出了物种在不同pH值的DOX-水混合物中的分布图。根据滴定曲线推论了各种二元和三元配合物的生成。用两种方法解释了三元配合物比对应的二元配合物稳定的原因。展开更多
A comprehensive thermodynamic model,which combined the Helgeson-Kirkham-Flowers(HKF) equation of state for standard-state thermodynamic properties of all species with realistic activity coefficient model developed by ...A comprehensive thermodynamic model,which combined the Helgeson-Kirkham-Flowers(HKF) equation of state for standard-state thermodynamic properties of all species with realistic activity coefficient model developed by BROMLEY,was used to calculate the thermodynamic equilibrium,and a graphical method was developed to construct predominance existence diagrams(PED) for copper-ammonia-chloride in the presence of realistically modeled aqueous solutions.The existence of the different predominant chemical species for Cu(II) predicted by the diagrams was corroborated by spectrophotometrical studies and X-ray diffractometry.The simulated and experimental results indicate that the predominance of a given species in solution strongly depends on the pH value in this system.More quantitative information on real copper hydrometallurgy in the presence of ammonia and chloride can be obtained from these diagrams compared with the conventional predominance existence diagrams.展开更多
文摘对M髤[M=Co,Ni and Cu]与L-多巴（L）和1,10-菲咯啉（X）在的1,4-二氧杂环己烷（DOX）-水混合物【0~60%（V/V）】三元配合物体系在（303.0±0.1）K和离子强度为0.16 mol.L-1情况下进行pH滴定。结果表明：对Co髤和Cu髤而言,三元物种为MLX2H,MLXH,ML2X和MLX,但对Ni髤而言,三元物种为MLX2H,MLXH和MLX。三元物种的稳定性和浓度随介质的介电常数的变化趋势根据静电和非静电力作出解释。同时还给出了物种在不同pH值的DOX-水混合物中的分布图。根据滴定曲线推论了各种二元和三元配合物的生成。用两种方法解释了三元配合物比对应的二元配合物稳定的原因。
基金Project(2007CB613601) supported by the National Basic Research Program of China
文摘A comprehensive thermodynamic model,which combined the Helgeson-Kirkham-Flowers(HKF) equation of state for standard-state thermodynamic properties of all species with realistic activity coefficient model developed by BROMLEY,was used to calculate the thermodynamic equilibrium,and a graphical method was developed to construct predominance existence diagrams(PED) for copper-ammonia-chloride in the presence of realistically modeled aqueous solutions.The existence of the different predominant chemical species for Cu(II) predicted by the diagrams was corroborated by spectrophotometrical studies and X-ray diffractometry.The simulated and experimental results indicate that the predominance of a given species in solution strongly depends on the pH value in this system.More quantitative information on real copper hydrometallurgy in the presence of ammonia and chloride can be obtained from these diagrams compared with the conventional predominance existence diagrams.
