P204萃取剂与离子液体混合促进锌铜分离的研究
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摘要
本文研究了由二(2-乙基己基)磷酸酯(P204)和离子液体(三己基(十四)氯化磷(IL101)或三辛基甲基氯化铵(A336))的混合萃取剂对锌/铜分离的行为。在P204中添加离子液体后,锌和铜的萃取效率均有所降低,表现出反协同萃取行为,但对铜的萃取抑制尤为显著,从而使锌/铜分离系数显著提高。因此,通过调整混合萃取剂中离子液体的类型和摩尔分数,可显著促进锌/铜的分离;并进一步用红外和核磁共振谱阐明了混合萃取剂中P204和离子液体之间的分子间相互作用机理。
The influence of the mixed extractants, including di-(2-ethylhexyl) phosphoric acid( P204), ionic liquids( Trihexyl( tetradecyl) phosphonium chloride( IL101) or Methyl trioctyl ammonium chloride( A336), on the separation behaviors of Zn( Ⅱ) / Cu( Ⅱ) were investigated. The antagonistic phenomena can be found for the extraction of both zinc and copper when ionic liquids were added into P204, especially for Cu(Ⅱ), thus the Zn(Ⅱ) / Cu(Ⅱ)separation can be greatly improved by adjusting the kinds and mole fractions of ionic liquids in the mixed extractants. The diverse intermolecular interactions between P204 and ionic liquids were elucidated with IR and NMR spectroscopies.
The influence of the mixed extractants, including di-(2-ethylhexyl) phosphoric acid( P204), ionic liquids( Trihexyl( tetradecyl) phosphonium chloride( IL101) or Methyl trioctyl ammonium chloride( A336), on the separation behaviors of Zn( Ⅱ) / Cu( Ⅱ) were investigated. The antagonistic phenomena can be found for the extraction of both zinc and copper when ionic liquids were added into P204, especially for Cu(Ⅱ), thus the Zn(Ⅱ) / Cu(Ⅱ)separation can be greatly improved by adjusting the kinds and mole fractions of ionic liquids in the mixed extractants. The diverse intermolecular interactions between P204 and ionic liquids were elucidated with IR and NMR spectroscopies.
引文
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[17]BELTRAMI D,COTE G,MOKHTARI H,et al.Recovery of uranium from wet phosphoric acid by solvent wxtraction processes[J].Chem Rev,2014,114(24):12 002-12 023.
[18]MORAIS B S,MANSUR M B.Characterisation of the reactive test system Zn SO4/D2EHPA in n-heptane[J].Hydrometallurgy,2004,74(1-2):11-18.
[19]PEREIRA D D,ROCHA S D F,MANSUR M B.Recovery of zinc sulphate from industrial effluents by liquid-liquid extraction using D2EHPA(di-2-ethylhexyl phosphoric acid)[J].Sep Purif Technol,2007,53(1):89-96.
[2]FLETT D.New reagents or new ways to use old reagents[J].J Chem Technol Biotechnol,1999,74(2):99-105.
[3]CHAGNES A,FOSSE C,COURTAUD B,et al.Chemical degradation of trioctylamine and 1-tridecanol phase modifier in acidic sulfate media in the presence of vanadium(V)[J].Hydrometallurgy,2011,105(3-4):328-333.
[4]REY J,DOURDAIN S,BERTHON L,et al.Synergy in extraction system chemistry:combining configurational entropy,film bending and perturbation of complexation[J].Langmuir,2015,31(25):7 006-7 015.
[5]BELTRAMI D,CHAGNES A,HADDAD M,et al.Recovery of uranium(VI)from concentrated phosphoric acid by mixtures of new bis(1,3-dialkyloxypropan-2-yl)phosphoric acids and tri-noctylphosphine oxide[J].Hydrometallurgy,2013(140):28-33.
[6]LIU Y,JEON H S,LEE M S.Solvent extraction of Pr and Nd from chloride solution by the mixtures of Cyanex 272 and amine extractants[J].Hydrometallurgy,2014(150):61-67.
[7]JIANG D,SONG N,LIAO S,et al.Study on the synergistic extraction of vanadium by mixtures of acidic organophosphorus extractants and primary amine N1923[J].Sep Purif Technol,2015(156):835-840.
[8]CHAGNES A,RAGER M N,COURTAUD B,et al.Speciation of vanadium(V)extracted from acidic sulfate media by trioctylamine in n-dodecane modified with 1-tridecanol[J].Hydrometallurgy,2010,104(1):20-24.
[9]SUN X,LUO H,DAI S.Ionic liquids-based extraction:a promising strategy for the advanced nuclear fuel cycle[J].Chem Rev,2011,112(4):2 100-2 128.
[10]POSPIECH B.Synergistic Solvent Extraction and Transport of Zn(II)and Cu(II)across Polymer Inclusion Membranes with a Mixture of TOPO and Aliquat 336[J].Sep Sci Technol,2014,49(11):1 706-1 712.
[11]CHAGNES A,MONCOMBLE A,COTE G.InSilico calculations as a helpful tool for designing new extractants in liquid-liquid extraction[J].Solvent Extr Ion Exch,2013,31(5):499-518.
[12]BELTRAMI D,CHAGNES A,HADDAD M,et al.Solvent extraction studies of uranium(VI)from phosphoric acid:Role of synergistic reagents in mixture with bis(2-ethylhexyl)phosphoric acid[J].Hydrometallurgy,2014(144-145):207-214.
[13]VANDER H T,WELLENS S,VERACHTERT K,et al.Removal of transition metals from rare earths by solvent extraction with an undiluted phosphonium ionic liquid:separations relevant to rare-earth magnet recycling[J].Green Chem,2013,15(4):919-927.
[14]WELLENS S,THIJS B,BINNEMANS K.An environmentally friendlier approach to hydrometallurgy:highly selective separation of cobalt from nickel by solvent extraction with undiluted phosphonium ionic liquids[J].Green Chem,2012,14(6):1 657-1 665.
[15]BISWAS R K,BANU R A,ISLAM M N.Some physico-chemical properties of D2EHPA[J].Hydrometallurgy,2003,69(1-3):157-168.
[16]PEPPARD D F,FERRARO J R.The preparation and infra-red absorption spectra of several complexes of bis-(2-ethylhexyl)-phosphoric acid[J].J Inorg Nucl Chem,1959,10(3-4):275-288.
[17]BELTRAMI D,COTE G,MOKHTARI H,et al.Recovery of uranium from wet phosphoric acid by solvent wxtraction processes[J].Chem Rev,2014,114(24):12 002-12 023.
[18]MORAIS B S,MANSUR M B.Characterisation of the reactive test system Zn SO4/D2EHPA in n-heptane[J].Hydrometallurgy,2004,74(1-2):11-18.
[19]PEREIRA D D,ROCHA S D F,MANSUR M B.Recovery of zinc sulphate from industrial effluents by liquid-liquid extraction using D2EHPA(di-2-ethylhexyl phosphoric acid)[J].Sep Purif Technol,2007,53(1):89-96.