Solvent extraction of palladium(II) with nonchelating oximes with different alkyl chain lengths
Solvent extraction of palladium(II) with nonchelating oximes with different alkyl chain lengths
复制标题
DOI：
10.1021/ie00106a021
复制
发表时间：
1990-10
影响因子：
4.2
通讯作者：
Y. Baba;Katsutoshi Inoue;K. Yoshizuka;Takashi Furusawa
中科院分区：
文献类型：
--
作者：
Y. Baba;Katsutoshi Inoue;K. Yoshizuka;Takashi Furusawa
用4种不同长度烷基的非螯合肟类萃取剂(十二醛、十一醛、辛醛和己醛)，从平衡、动力学以及萃取剂的水溶液溶解度和界面吸附平衡等方面研究了萃取剂的疏水性对钯(II)萃取机理的影响。负载实验表明，钯(II)以1：2的Pd：萃取剂与各种肟形成络合物。根据界面反应模型，合理地解释了不溶于水溶液且具有界面活性的十二烷基肟的萃取动力学。水相和有机相界面处形成的中间络合物限制了反应速度。
By using four kinds of nonchelating oximes with alkyl chains of different lengths (dodecanal oxime, decanal oxime, octanal oxime, and hexanal oxime), the effects of the hydrophobicity of these extractants on the extraction mechanism of palladium(II) were investigated from the equilibria and kinetic aspects along with the aqueous solubilities and the interfacial adsorption equilibria of the extractants. The loading test showed that palladium(II) was extracted as 1:2 Pd:extractrant complexes with all kinds of oximes. The extraction kinetics with dodecanal oxime, which is practically insoluble in the aqueous solution and interfacially active, was reasonably interpreted in terms of the interfacial reaction model. The rate is limited by the formation of the intermediate complex at the interface between the aqueous and organic phases