The conventional rare earth solvent extraction equipments have many problems such as long mixing time, low processing capacity, large factory area occupation, high energy consumption and so on. In order to solve the problems, many types of equipments were brought out. In this work, studies were carried out on the La(III) extraction process with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (EHEHPA) by membrane dispersion micro-extractor. Equilibrium studies showed that the initial aqueous pH value 4.15 with the saponification rate 40%was the optimal operation condition. The effects of membrane dispersion micro-extractor operational conditions such as dispersion mode, bulk flow rate and organic phase flow rate on the extraction efficiency were studied. The results showed that when the organic solution was the dispersed phase, the extraction efficiency was higher than that of others. Increasing bulk flow ratio could enhance the extraction efficiency greatly. When the ratio of organic phase flow rate to that of aque-ous phase was 80:80, the extraction efficiency was over 95%. The effect of stripping phase acidity on the La(III) recovery was studied. The results showed that when the stripping phase pH was 2.0, organic phase flow rate to stripping phase flow rate was 20:80;the re-covery efficiency of La(III) can reach 82%.
参考文献
| [1] | 骆广生,蒲煜,孙永,汪家鼎.微孔膜制乳技术基本规律研究[J].化学工程,2001(01):44-47. |
| [2] | 徐建鸿,骆广生,孙永,陈桂光.膜分散式混合澄清萃取器性能研究[J].高校化学工程学报,2003(04):361-364. |
| [3] | Xu JH;Luo GS;Chen GG;Tan B .Mass transfer performance and two-phase flow characteristic in membrane dispersion mini-extractor[J].Journal of Membrane Science,2005(1/2):75-81. |
| [4] | Wu Y;Li W;Gao H .A novel continuous re-extraction pro-cedure of penicillin G by a micro-extractor based on ce-ramic membrane[J].Journal of Membrane Science,2010,347(1-2):17. |
| [5] | J. Tan;Z.D. Liu;Y.C. Lu .Process intensification of H2O2 extraction using gas-liquid-liquid microdispersion system[J].Separation and Purification Technology,2011(2):225-234. |
| [6] | J. Tan;L. Du;Y.C. Lu .Development of a gas-liquid microstructured system for oxidation of hydrogenated 2-ethyltetrahydroanthraquinone[J].Chemical engineering journal,2011(3):1406-1414. |
| [7] | Higa N;Nishihama S;Yoshizuka K .Adsorption of euro-pium(iii)by solvent impregnated kapok fibers containing 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester[J].Solvent Extraction and Ion Exchange,2011,18:187. |
| [8] | Kubota F.;Nakashio F.;Hano T.;Goto M. .EXTRACTION KINETICS OF RARE EARTH METALS WITH 2-ETHYLHEXYL PHOSPHONIC ACID MONO-2-ETHYLHEXYL ESTER USING A HOLLOW FIBER MEMBRANE EXTRACTOR[J].Separation Science and Technology,1995(5):777-792. |
| [9] | Abdeltawab A A;Nii S;Kawaizumi F;Takahashi K .Sepa-ration of La and Ce with PC-88A by counter-current mixer-settler extraction column[J].Separation and Purification Technology,2002,26(2-3):265. |
| [10] | Uezu K.;Yoshimura O.;Goto M.;Nakashio F.;Irie S. .EXTRACTION OF RARE EARTH METALS USING LIQUID SURFACTANT MEMBRANES IN A MIXCO EXTRACTOR[J].Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers,1997(A5):513-518. |
| [11] | Goto M;Kakoi T;Yoshii N;Kondo K,Nakashio F .Effect of synthesized surfactants in the separation of rare-earth-metals by liquid surfactant membranes[J].Industrial and Engineering Chemistry Research,1993,32(08):1681. |
| [12] | Deive F J;Rodríguez A;Rebelo L P N;Marrucho I M .Ex-traction of Candida antarctica lipase A from aqueous solu-tions using imidazolium-based ionic liquids[J].Separation and Purification Technology,2012,97(0):205. |
| [13] | Deng Y F;Zhao H;Chen J;Li Y M,Gong F Q,Han X M,Liu W F .Ionic liquid as novel spectroscopic solvents for Eu(III)-containing complex[J].Journal of Rare Earths,2011,29(10):915. |
| [14] | Yong Zuo;Ji Chen;Deqian Li .Reversed micellar solubilization extraction and separation of thorium(IV) from rare earth(III) by primary amine N1923 in ionic liquid[J].Separation and Purification Technology,2008(3):684-690. |
| [15] | Gwang Seop Lee;Masahito Uchikoshi;Kouji Mimura .Distribution coefficients of La, Ce, Pr, Nd, and Sm on Cyanex 923-, D2EHPA-, and PC88A-impregnated resins[J].Separation and Purification Technology,2009(1):79-85. |
| [16] | Sun X;Peng B;Ji Y .The solid-liquid extraction of yttrium from rare earths by solvent(ionic liquid)impregnated resin coupled with complexing method[J].Separation and Purification Technology,2008,63(01):61. |
| [17] | G.G.Chen;G.S.Luo;S.W.Li;J.H.Xu;J.D.Wang .Experimental Approaches for Understanding Mixing Performance of a Minireactor[J].AIChE Journal,2005(11):2923-2929. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%