Solvent extraction of vanadium (IV) from sulfuric acid solution using P507

LI Xingbin; WEI Chang; DENG Zhigan; LI Minting; LI Cunxiong; FAN Gang

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Solvent extraction of vanadium (IV) from sulfuric acid solution using P507

LI Xingbin #,WEI Chang *,DENG Zhigan,LI Minting,LI Cunxiong,FAN Gang

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093

*Correspondence author

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Funding: Research Fund for the Doctoral Program of Higher Education of China （No.Grant No. 20115314110001）, National Basic Research Program of China （No.Grant No. 2014CB643404）, NSFC （No.Natural Science Foundation of China, Grant Nos. 51304093 and 51474115）

Opened online: 4 November 2014

Accepted by: none

Citation: LI Xingbin,WEI Chang,DENG Zhigan.Solvent extraction of vanadium (IV) from sulfuric acid solution using P507[OL]. [ 4 November 2014] http://en.paper.edu.cn/en_releasepaper/content/4615430

Solvent extractionof vanadium(IV) from sulfuric acid solution has been studied using 2-ethyhexyl phosphonic acid mono 2-ethylhexyl ester (P507) dissolved in kerosene. The different affecting parameters of equilibrium pH, extractant concentration, temperature and extraction isotherm were separately investigated. The extraction of vanadium(IV) from a synthetic sulfuric acid leach solution of stone coal was also examined. The equilibrium study indicated the release of two moles of H+ ions for extraction of one mole of vanadium(IV) and association of two moles of the mono extractant in the extracted species. The extracted complex VOA2 was calculated from slope analysis and confirmed by IR spectra. A positive value of ΔH obtained from temperature variation studies show that the extraction process is endothermic reaction. A continuous counter current simulation extractionand stripping confirmed 96.1% extraction and 99.6% stripping, further attributes to the enrichment 5 times of vanadium(IV) concentration in the strip solution.

Keywords:Vanadium; Solvent extraction; P507

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