Extraction and back-extraction behaviors of 14 rare earth elements from sulfuric acid medium by TODGA
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摘要
The unique physical and chemical properties of rare earth elements lay the foundation for their extensive application. N,N,N',N' Tetra-octyl-3-oxopentanediamide(TODGA) is excellent in its ability of extracting rare earth elements and it is favored for green initiative. In this paper, the extraction and back-extraction of14 rare earth elements by TODGA were studied. Experiments show that in conditions of 6 mol/L sulfuric acid, the extraction temperature of 25 ℃,the phase ratio of 1:1 and 0.04 mol/LTODGA(aviation kerosene as the diluent), the extraction rates of 14 rare earth elements including lanthanum, cerium, praseodymium,neodymium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and yttrium were 99.00%-99.73%. Mixed with hydrochloric acid and nitric acid(HCl 3.5 mol/L, HNO_30.5 mol/L), the recoveries of the 14 rare earth elements are 91.52%-99.91% when the extraction temperature is 25 ℃ and the ratio is 1:1. The following application is based on the optimum conditions above with practical samples(from the roasting production line of China North Rare Earth High-tech Company Limited) for extraction and back-extraction experiments. Experiments show that TODGA has excellent enrichment effect on 14 rare earth elements, the extraction rates are 91.36%-99.80%, the back-extraction rates are 87.29%-99.64% and the total recoveries are 81.19%-99.44%.
The unique physical and chemical properties of rare earth elements lay the foundation for their extensive application. N,N,N',N' Tetra-octyl-3-oxopentanediamide(TODGA) is excellent in its ability of extracting rare earth elements and it is favored for green initiative. In this paper, the extraction and back-extraction of14 rare earth elements by TODGA were studied. Experiments show that in conditions of 6 mol/L sulfuric acid, the extraction temperature of 25 ℃,the phase ratio of 1:1 and 0.04 mol/LTODGA(aviation kerosene as the diluent), the extraction rates of 14 rare earth elements including lanthanum, cerium, praseodymium,neodymium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and yttrium were 99.00%-99.73%. Mixed with hydrochloric acid and nitric acid(HCl 3.5 mol/L, HNO_30.5 mol/L), the recoveries of the 14 rare earth elements are 91.52%-99.91% when the extraction temperature is 25 ℃ and the ratio is 1:1. The following application is based on the optimum conditions above with practical samples(from the roasting production line of China North Rare Earth High-tech Company Limited) for extraction and back-extraction experiments. Experiments show that TODGA has excellent enrichment effect on 14 rare earth elements, the extraction rates are 91.36%-99.80%, the back-extraction rates are 87.29%-99.64% and the total recoveries are 81.19%-99.44%.
The unique physical and chemical properties of rare earth elements lay the foundation for their extensive application. N,N,N',N' Tetra-octyl-3-oxopentanediamide(TODGA) is excellent in its ability of extracting rare earth elements and it is favored for green initiative. In this paper, the extraction and back-extraction of14 rare earth elements by TODGA were studied. Experiments show that in conditions of 6 mol/L sulfuric acid, the extraction temperature of 25 ℃,the phase ratio of 1:1 and 0.04 mol/LTODGA(aviation kerosene as the diluent), the extraction rates of 14 rare earth elements including lanthanum, cerium, praseodymium,neodymium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and yttrium were 99.00%-99.73%. Mixed with hydrochloric acid and nitric acid(HCl 3.5 mol/L, HNO_30.5 mol/L), the recoveries of the 14 rare earth elements are 91.52%-99.91% when the extraction temperature is 25 ℃ and the ratio is 1:1. The following application is based on the optimum conditions above with practical samples(from the roasting production line of China North Rare Earth High-tech Company Limited) for extraction and back-extraction experiments. Experiments show that TODGA has excellent enrichment effect on 14 rare earth elements, the extraction rates are 91.36%-99.80%, the back-extraction rates are 87.29%-99.64% and the total recoveries are 81.19%-99.44%.
引文
1.Zhang LC,Chen QL,Kang C,Ma X,Yang ZL.Rare earth extraction from wet process phosphoric acid by emulsion liquid membrane.J Rare Earths.2016;34(7):717.
2.Lou ZN,Xiong Y,Song JJ,Shan WJ,Han GX,Xing ZQ,et al.Kinetics and mechanism of Re(Ⅶ)extraction and separation from Mo(Ⅵ)with trialkyl amine.T Nonferr Metal Soc.2010;20(s1):10.
3.Li H.Applications of P507 and P204 in rare earth separation.Science&Technology of Baotou Steel Corporation(in Chin).2005;31:26.
4 Wang JL,Chen G,Xu SM,Li LY.Synthesis of novel nonsymmetric dialkylphosphinic acid extractants and studies on their extraction-separation performance for heavy rare earths.Hydrometallurgy.2015;154:129.
5.Wang JL,Xie MY,Wang HJ,Xu SM.Solvent extraction and separation of heavy rare earths from chloride media using nonsymmetric(2,3-dimethylbutyl)(2,4,4'-trimethylpentyl)phosphinic acid.Hydrometallurgy.2017;167:39。
6.Sasaki Y,Kitatsuji Y,Sugo Y,Asakura T,Kimura Y.Chemical separation of actinides from high level radioactive liquid waste using diglycol-amide(DGA)Compounds[C].Global.555 North Kensington Avenue,La Grange Park,IL 60526(United States):American Nuclear Society;2007.
7.Ansari SA,Pathak P,Mohapatra PK,Manchanda VK.Chemistry of diglycolamides:promising extractants for actinide partitioning.Chem Rev.2012;112(3):1751.
8.Pathak PN,Ansari SA,Kumar S,Tomar BS,Manchanda VK.Dynamic light scattering study on the aggregation behaviour of N,N,N',N'-tetraoctyl diglycolamide(TODGA)and its correlation with the extraction behaviour of metal ions.J Colloid Interface Sci.2010;342(1):114.
9.Tachimori S,Sasaki Y,Suzuki Y.Modification of TODGA-n-dodecane solvent with a monoamide for high loading of lanthanides(Ⅲ)and actinides(Ⅲ).Solv Extr Ion Exch.2002;20(6):687.
10.Panja S,Mohapatra PK,Tripathi SC,Gandhi PM,Janardan P.A highly efficient solvent system containing todga in room temperature ionic liquids for actinide extraction.Sep Purif Technol.2012;96(33):289.
11.Mohapatra PK,Iqbal M,Raut DR,Verboom W,Huskens J,Manchanda V.Evaluation of a novel tripodal diglycolamide for actinide extraction:solvent extraction and SLM transport studies.J Membr Sci.2011;375(1-2):141.
12.Ansari SA,Pathak PN,Husain M,Prasad AK,Parmar VS,Manchanda VK.Extraction of actinides using N,N,N',N'-tetraoctyl diglycolamide(TODGA):a thermodynamic study.Radiochim Acta.2006;94(6-7/2006):307.
13.Dutta S,Mohapatra PK,Manchanda VK.Separation of 90Y from 90 Sr by a solvent extraction method using N,N,N',N'-tetraoctyl diglycolamide(TODGA)as the extractant Appl Radiat Isot.2011;69(1):158.
14.Zhu WB,Ye GA,Li FF,Li HR.Kinetics and mechanism of am(Ⅲ)extraction with TODGA.J Radioanal Nucl Chem.2013;298(3):1749.
15.Zhang YW,Liu ZY,Fan FY,Zhu L,Shen YL.Extraction of uranium and thorium from nitric acid solution by todga in ionic liquids.Sep Sci Technol.2014;49(12):1895.
16.Ravi J,Venkatesan KA,Antony MP,Srinivasan TG,Rao PRV.Tuning the diglycolamides for modifier-free minor actinide partitioning.J Radioanal Nucl Chem2013;295(2):1283.
17.Ravi J,Suneesh AS,Prathibha T,Venkatesan KA,Antony MP,Srinivasan TG,et al.Extraction behavior of some actinides and fission products from nitric acid medium by a new unsymmetrical diglycolamide.Solvent Extr Ion Exc.2011;29(1):86.
18.Ansari SA,Pathak P,Mohapatra PK,Manchanda VK.Chemistry of diglycolamides:promising extractants forActinide partitioning.Chem Rev.2012;112(3):1751.
19.Sasaki Y,Sugo Y,Suzuki S,Tachimori S.The novel extractants,diglycolamides,for the extraction of lanthanides and actinides in hno3-n-dodecane system.Solv Extr Ion Exch.2001;19(1):91.
20.Nayak PK,Kumaresan R,Venkatesan KA,Antony MP,Rao PRV.A new method for partitioning of trivalent actinides from high-level liquid waste.Sep Sci Technol.2013;48(9):1409.
2.Lou ZN,Xiong Y,Song JJ,Shan WJ,Han GX,Xing ZQ,et al.Kinetics and mechanism of Re(Ⅶ)extraction and separation from Mo(Ⅵ)with trialkyl amine.T Nonferr Metal Soc.2010;20(s1):10.
3.Li H.Applications of P507 and P204 in rare earth separation.Science&Technology of Baotou Steel Corporation(in Chin).2005;31:26.
4 Wang JL,Chen G,Xu SM,Li LY.Synthesis of novel nonsymmetric dialkylphosphinic acid extractants and studies on their extraction-separation performance for heavy rare earths.Hydrometallurgy.2015;154:129.
5.Wang JL,Xie MY,Wang HJ,Xu SM.Solvent extraction and separation of heavy rare earths from chloride media using nonsymmetric(2,3-dimethylbutyl)(2,4,4'-trimethylpentyl)phosphinic acid.Hydrometallurgy.2017;167:39。
6.Sasaki Y,Kitatsuji Y,Sugo Y,Asakura T,Kimura Y.Chemical separation of actinides from high level radioactive liquid waste using diglycol-amide(DGA)Compounds[C].Global.555 North Kensington Avenue,La Grange Park,IL 60526(United States):American Nuclear Society;2007.
7.Ansari SA,Pathak P,Mohapatra PK,Manchanda VK.Chemistry of diglycolamides:promising extractants for actinide partitioning.Chem Rev.2012;112(3):1751.
8.Pathak PN,Ansari SA,Kumar S,Tomar BS,Manchanda VK.Dynamic light scattering study on the aggregation behaviour of N,N,N',N'-tetraoctyl diglycolamide(TODGA)and its correlation with the extraction behaviour of metal ions.J Colloid Interface Sci.2010;342(1):114.
9.Tachimori S,Sasaki Y,Suzuki Y.Modification of TODGA-n-dodecane solvent with a monoamide for high loading of lanthanides(Ⅲ)and actinides(Ⅲ).Solv Extr Ion Exch.2002;20(6):687.
10.Panja S,Mohapatra PK,Tripathi SC,Gandhi PM,Janardan P.A highly efficient solvent system containing todga in room temperature ionic liquids for actinide extraction.Sep Purif Technol.2012;96(33):289.
11.Mohapatra PK,Iqbal M,Raut DR,Verboom W,Huskens J,Manchanda V.Evaluation of a novel tripodal diglycolamide for actinide extraction:solvent extraction and SLM transport studies.J Membr Sci.2011;375(1-2):141.
12.Ansari SA,Pathak PN,Husain M,Prasad AK,Parmar VS,Manchanda VK.Extraction of actinides using N,N,N',N'-tetraoctyl diglycolamide(TODGA):a thermodynamic study.Radiochim Acta.2006;94(6-7/2006):307.
13.Dutta S,Mohapatra PK,Manchanda VK.Separation of 90Y from 90 Sr by a solvent extraction method using N,N,N',N'-tetraoctyl diglycolamide(TODGA)as the extractant Appl Radiat Isot.2011;69(1):158.
14.Zhu WB,Ye GA,Li FF,Li HR.Kinetics and mechanism of am(Ⅲ)extraction with TODGA.J Radioanal Nucl Chem.2013;298(3):1749.
15.Zhang YW,Liu ZY,Fan FY,Zhu L,Shen YL.Extraction of uranium and thorium from nitric acid solution by todga in ionic liquids.Sep Sci Technol.2014;49(12):1895.
16.Ravi J,Venkatesan KA,Antony MP,Srinivasan TG,Rao PRV.Tuning the diglycolamides for modifier-free minor actinide partitioning.J Radioanal Nucl Chem2013;295(2):1283.
17.Ravi J,Suneesh AS,Prathibha T,Venkatesan KA,Antony MP,Srinivasan TG,et al.Extraction behavior of some actinides and fission products from nitric acid medium by a new unsymmetrical diglycolamide.Solvent Extr Ion Exc.2011;29(1):86.
18.Ansari SA,Pathak P,Mohapatra PK,Manchanda VK.Chemistry of diglycolamides:promising extractants forActinide partitioning.Chem Rev.2012;112(3):1751.
19.Sasaki Y,Sugo Y,Suzuki S,Tachimori S.The novel extractants,diglycolamides,for the extraction of lanthanides and actinides in hno3-n-dodecane system.Solv Extr Ion Exch.2001;19(1):91.
20.Nayak PK,Kumaresan R,Venkatesan KA,Antony MP,Rao PRV.A new method for partitioning of trivalent actinides from high-level liquid waste.Sep Sci Technol.2013;48(9):1409.