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Kinetics of nickel(II) extraction by 2-ethylhexanal oxime in ammonium nitrate solutions

机译:2-乙基己醛肟在硝酸铵溶液中萃取镍的动力学

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Kinetics of nickel(II) extraction by 2-ethylhexanal oxime (EHO) has been investigated in a homothetic cell (Rushton cell) from ammonium solutions.The kinetic study was carried out with a stirring speed fast enough to eliminate the diffusion limitation.The chemical regime can then be assumed and the kinetic result can be used to determine the reaction mechanism.Thus,a kinetic mechanism has been suggested and a limiting step found.Influence of pH and the concentrations of NH4NO3 and EHO on rate have been investigated and results suggest that the limiting step is an interfacial reaction between a molecule of EHO monomer (HOx) and the adsorbed complex Ni(Ox)(H2O)5ad+.
机译:在氨溶液的同质池(Rushton池)中研究了用2-乙基己酮肟(EHO)萃取镍(II)的动力学,并以足够快的搅拌速度进行了动力学研究,以消除扩散限制。因此,提出了一种动力学机理并找到了一个限制步骤。研究了pH值以及NH4NO3和EHO的浓度对反应速率的影响,结果表明限制步骤是EHO单体(HOx)分子与吸附的配合物Ni(Ox)(H2O)5ad +之间的界面反应。

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