三烷基胺和磷酸三丁酯于盐酸介质中协同萃取铼(Ⅶ)研究（英文）
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摘要
研究了三烷基胺(N235)和磷酸三丁酯(TBP)从盐酸介质中对铼的协同萃取.N235和TBP的浓度比为1∶9时混合萃取体系对Re(Ⅶ)具有较大的协萃作用,最大协萃因子为4.71,对Mo(Ⅵ)的协萃因子为2.16.在pH=1时,萃合物的组成为(R_3NH~+Cl~-)2·HReO_4·B,当酸浓度为3mol·L-1时,萃合物的组成为(R_3NH~+Cl~-)·HReO_4·B,而N235单独萃取时萃合物的组成为R_3NH~+Re_4O~-.同时证明了混合萃取剂分离钼和铼的协萃效果和萃取能力.
The synergistic extraction of Re(Ⅶ)from hydrochloric media by mixtures of tri-alkylamine(N235)and tri-n-butylphosphate(TBP)is studied.The mixtures have higher synergistic effects on Re(Ⅶ)than that on Mo(Ⅵ),and the maximal synergistic factors of the mixture for Re(Ⅶ)and Mo(Ⅵ)are 4.71 and 2.16 at a concentration ratio of N235 to TBP of 1 to 9.Re(Ⅶ)is extracted as(R_3NH~+Cl~-)_2· HReO_4·B at pH=1,whereas Re(Ⅶ)is extracted as(R_3NH~+Cl~-)·HReO_4·B by the mixtures at the acidity of 3 mol·L-1,instead of R_3NH~+ReO_4~- by N235 alone.Furthermore,the possibility of separating rhenium and molybdenum ions by the mixtures according to the synergistic effects and extraction ability are proved.
The synergistic extraction of Re(Ⅶ)from hydrochloric media by mixtures of tri-alkylamine(N235)and tri-n-butylphosphate(TBP)is studied.The mixtures have higher synergistic effects on Re(Ⅶ)than that on Mo(Ⅵ),and the maximal synergistic factors of the mixture for Re(Ⅶ)and Mo(Ⅵ)are 4.71 and 2.16 at a concentration ratio of N235 to TBP of 1 to 9.Re(Ⅶ)is extracted as(R_3NH~+Cl~-)_2· HReO_4·B at pH=1,whereas Re(Ⅶ)is extracted as(R_3NH~+Cl~-)·HReO_4·B by the mixtures at the acidity of 3 mol·L-1,instead of R_3NH~+ReO_4~- by N235 alone.Furthermore,the possibility of separating rhenium and molybdenum ions by the mixtures according to the synergistic effects and extraction ability are proved.
引文
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[15]CAO Zhanfang,ZHONG Hong,QIU Zhaohui.Solvent extraction of rhenium from molybdenum in alkaline solution[J].Hydrometallurgy,2009,97(3/4):153-157.
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[3]FAVRE-REGUILLON A,DRAYE M,COTE G,et al.Insights in uranium extraction from spent nuclear fuels using dicyclohexano-18-crown-6-fate of rhenium as technetium homolog[J].Separation and Purification Technology,2019,209:338-342.
[4]TRUONG H T,NGUYEN T H,LEE M S.Separation of molybdenum(Ⅵ),rhenium(Ⅶ),tungsten(Ⅵ),and vanadium(V)by solvent extraction[J].Hydrometallurgy,2017,171:298-305.
[5]GERHARDT N I,PALANT A A,PETROVA VA,et al.Solvent extraction of molybdenum(Ⅵ),tungsten(Ⅵ)and rhenium(Ⅶ)by diisododecylamine from leach liquors[J].Hydrometallurgy,2001,60(1):1-5.
[6]OGATA T,TAKESHITA K,TSUDA K,et al.Solvent extraction of perrhenate ions with podandtype nitrogen donor ligands[J].Separation and Purification Technology,2009,68(2):288-290.
[7]XIONG Chunhua,YAO Caiping,WU Xiangmei.Adsorption of rhenium(Ⅶ)on 4-amino-1,2,4-triazole resin[J].Hydrometallurgy,2008,90(2/3/4):221-226.
[8]XIONG Ying,LOU Zhenning,YUE Shuang,et al.Kinetics and mechanism of Re(Ⅶ)extraction with mixtures of tri-alkylamine and tri-nbutylphosphate[J].Hydrometallurgy,2010,100(3/4):110-114.
[9]YU Shuqiu,CHEN Jiayong.Mechanism of synergistic extraction of rhenium(Ⅶ)by primary amines and neutral phosphorus esters[J].Hydrometallurgy,1985,14(1):115-118.
[10]LI Jinwen,TANG Huimin.The equilibrium of synergistic extraction for Re(Ⅶ)by primary amine N1923and TBP[J].Journal of Tongji University,1994,22(3):359-364.(in Chinese)
[11]CHEN Jiayong,WU Zhichun.Solvation extraction by amines and synergistic solvation extraction with neutral or acidic extractants[J].Mineral Processing and Extractive Metallurgy Review,2000,21(1/2/3/4):49-87.
[12]PRUETT D J,MCTAGGART D R.The solvent extraction behavior of rhenium.Part II.The hydrochloric acid-tributyl phosphate system[J].Separation Science and Technology,1982,17(8):1091-1100.
[13]SATO T,SATO K.Liquid-liquid extraction of rhenium(Ⅶ)from hydrochloric acid solutions by neutral organophosphorus compounds and high molecular weight amines[J].Hydrometallurgy,1990,25(3):281-291.
[14]PETROVA A M,KASIKOV A G.Rhenium(Ⅶ)solvent extraction with mixtures of tertiary amine and oxygen-containing extractants from sulphate media[J].Hydrometallurgy,2016,165(Part 2):270-274.
[15]CAO Zhanfang,ZHONG Hong,QIU Zhaohui.Solvent extraction of rhenium from molybdenum in alkaline solution[J].Hydrometallurgy,2009,97(3/4):153-157.
[16]SHMIDT V S.Solvent Extraction by the Amines[M].Moscow:Atomizdat,1970.
[17]VOLDMAN G M.The Basics of Solvent Extraction and Ion Exchange Processes in Hydrometallurgy[M].Moscow:Metallurgiya,1982.