Synergistic extraction of vanadium(IV) in sulfuric acid media using a mixture of D2EHPA and EHEHPA
作者： Ying Zhang , Ting-an Zhang , Guozhi Lv , Guoquan Zhang , Yan Liu
DOI: 10.1016/J.HYDROMET.2016.09.003
关键词:
摘要: Abstract In the present study, mechanisms and thermodynamics of vanadium extraction by a mixture bis-2-ethylhexyl phosphorous acid (D2EHPA) 2-ethylhexyl mono-2-ethylhexyl ester (EHEHPA) from sulfate medium were investigated. It was found that maximum synergistic factors obtained at XD2EHPA = 0.2 reaction is exothermical. Results showed system in presence complexing agents exhibit higher efficiency require lower consumption during stripping process vanadium. Fourier transform infrared (FT-IR) spectroscopy P–O–H P O extractants are responsible for VO2 + species cation exchange mechanism some hydrogen bonds between EHEHPA D2EHPA formed system. With slope analysis method, mainly predicted.
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