Effect of loaded organic phase containing mixtures of silicon and aluminum, single iron on extraction of lanthanum in saponification P507-HCl system
Effect of loaded organic phase containing mixtures of silicon and aluminum, single iron on extraction of lanthanum in saponification P507-HCl system
复制标题
皂化P507-HCl体系中硅铝混合物、单铁负载有机相对镧萃取的影响
DOI：
10.1016/s1002-0721(12)60348-2
复制
发表时间：
2013-07-01
影响因子：
4.9
通讯作者：
Zheng Qiang
中科院分区：
文献类型：
--
作者：
Wu Wenyuan;Zhang Fengyun;Zheng Qiang
由于非稀土杂质，特别是Si、Al和Fe的存在，乳化现象困扰着稀土的正常提取过程。在此背景下，系统研究了Si、Al和Fe引起的乳化作用对氯化物介质中皂化P507（2-乙基己基膦酸单-2-乙基己酯）萃取La的影响。通过一系列实验研究了La的萃取能力与杂质浓度的关系。采用ZPM-203偏光显微镜观察乳化物的形貌，并通过红外光谱阐明了Fe、Al和La的阳离子交换萃取机理。光谱。结果表明，有机相中低浓度的Si会加剧与Al的乳化，在Si和Al的混合物以及单一Fe的萃取中，ME（微乳液）和棒状聚合物的形成会导致乳化。此外，有机相中Si、Al和Fe等杂质的积累会同时严重降低La的萃取能力。
Emulsification troubled normal extraction process of rare earths due to the existence of non-rare earth impurities, especially Si, Al and Fe. Against this background, the effect of emulsification caused by Si, Al and Fe on the La extraction with saponification P507 (2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) in chloride medium was systematically investigated. A series of experiments were carried out to study the relationship of the extraction capacity of La and the concentration of impurities. ZPM-203 polarizing microscope was applied to investigate the morphology of emulsification, and the cation exchange extraction mechanism of Fe and Al as well as La was clarified by IR. spectra. The results showed that a low concentration of Si in organic phase would aggravate the emulsification with Al, and the formation of ME (micro emulsion) and club-shaped polymer would result in emulsification in the extraction of mixtures of Si and Al, single Fe, respectively. Furthermore, the accumulation of impurity such as Si, Al and Fe in the organic phase would severely reduce the extraction capacity of La simultaneously.