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考察了正辛烷等六种常用稀释剂中2-乙基己基膦酸单2-乙基已基酯从硝酸介质中萃取Fe(Ⅲ)的动力学行为.观察到稀释剂的极性不仅影响萃取速率的大小,而且会引起萃取过程控制模式的改变,即随着稀释剂极性的增加,萃取过程由界面化学反应和水相化学反应共同控制模式向单一的界面化学反应控制模式转变.
The kinetic behavior of extracting Fe (Ⅲ) from nitric acid medium with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester was studied in six common diluents, such as n-octane. It was observed that the polarity of the diluent not only affected The size of the extraction rate, and will lead to changes in the control mode of the extraction process, that is, as the diluent polarity increases, the extraction process changes from the interfacial chemical reaction and the aqueous chemical reaction common control mode to a single interfacial chemical reaction control mode.