A Y micromixer with a macroscopic mixing cavity at the inlet junction was developed. The effects of the mixing cavity on the improvement of extraction of copper by LIX 84I were investigated. The investigated parameters and their ranges were: overall flow rate: 10 – 200 mL/min; microchannel size: 0.5 – 1 mm and mixing cavity diameter: 5 – 20 mm. Extraction efficiency, volumetric mass transfer coefficient, kinetics and pressure drop were investigated. The extraction efficiency and the volumetric mass transfer coefficient in the cavity micromixer were significantly higher than the Y micromixer. The volumetric mass transfer coefficient ranged between 1 – 93 s -1 , and the pressure drop between 50 – 500 kPa. The residence time required in the micromixers was two orders of magnitude lesser than that of an agitated batch reactor.
{"title":"Solvent Extraction of Copper Enhanced by Mixing Cavities in Micromixer","authors":"A. Sheik, A. Kulkarni, K. Sanjay","doi":"10.15261/SERDJ.28.37","DOIUrl":"https://doi.org/10.15261/SERDJ.28.37","url":null,"abstract":"A Y micromixer with a macroscopic mixing cavity at the inlet junction was developed. The effects of the mixing cavity on the improvement of extraction of copper by LIX 84I were investigated. The investigated parameters and their ranges were: overall flow rate: 10 – 200 mL/min; microchannel size: 0.5 – 1 mm and mixing cavity diameter: 5 – 20 mm. Extraction efficiency, volumetric mass transfer coefficient, kinetics and pressure drop were investigated. The extraction efficiency and the volumetric mass transfer coefficient in the cavity micromixer were significantly higher than the Y micromixer. The volumetric mass transfer coefficient ranged between 1 – 93 s -1 , and the pressure drop between 50 – 500 kPa. The residence time required in the micromixers was two orders of magnitude lesser than that of an agitated batch reactor.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hao Wu, M. Nakase, Yusuke Inaba, M. Harigai, Tohru Kobayashi, T. Yaita, K. Takeshita, Seong Yun Kim
A novel soft N and hard O donor combined ligand including N,N,N’,N’ -tetrakis(2-pyridylmethyl)-1,3-diaminopropane-2-amide structure (TPTNA) was successfully synthesized. Its structure and complexation of Eu 3+ in solid state and methanol solution respectively were investigated by X-ray crystallography, UV-vis titration and EXAFS spectroscopy. As a result, the chemical stoichiometry of Eu 3+ complex with TPTNA was determined to be 1 : 1 by X-ray crystallography. It was found that one amide unit, two pyridine groups from TPTNA coordinated with one Eu 3+ . However, the Eu-O and Eu-N bond lengths obtained from theoretical fitting of the EXAFS data were consistent with the results from X-ray crystallography studies, reflecting retention of the structure in methanol solution.
{"title":"Complexation Studies of Eu(III) by a Novel Soft N and Hard O Donor Combined Ligand Including N,N,N',N'-Tetrakis(2-pyridylmethyl)-1,3-diaminopropane-2-amide Structure: UV-vis Titration, X-ray Crystallography, EXAFS Spectroscopy Analysis","authors":"Hao Wu, M. Nakase, Yusuke Inaba, M. Harigai, Tohru Kobayashi, T. Yaita, K. Takeshita, Seong Yun Kim","doi":"10.15261/SERDJ.28.69","DOIUrl":"https://doi.org/10.15261/SERDJ.28.69","url":null,"abstract":"A novel soft N and hard O donor combined ligand including N,N,N’,N’ -tetrakis(2-pyridylmethyl)-1,3-diaminopropane-2-amide structure (TPTNA) was successfully synthesized. Its structure and complexation of Eu 3+ in solid state and methanol solution respectively were investigated by X-ray crystallography, UV-vis titration and EXAFS spectroscopy. As a result, the chemical stoichiometry of Eu 3+ complex with TPTNA was determined to be 1 : 1 by X-ray crystallography. It was found that one amide unit, two pyridine groups from TPTNA coordinated with one Eu 3+ . However, the Eu-O and Eu-N bond lengths obtained from theoretical fitting of the EXAFS data were consistent with the results from X-ray crystallography studies, reflecting retention of the structure in methanol solution.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A diglycolamide based N , N ′ -Dimethyl- N , N ′ -di-2-phenylethyl-diglycol amide (MPEDGA) extractant was synthesized and dissolved into 1-butyl-3-methylimidazolium nonafluorobutanesulfonate ([C 4 mim][NfO]) to prepare the extraction phase. Its separation performance of Am-241 with Eu-152 in nitric acid solution was investigated. The extraction kinetics were fast and could reach equilibrium within 15 min. When [HNO 3 ] = 0.1 M, the maximum SF Eu-152/ Am-241 was obtained as 124. Moreover, with increase in the concentration of HNO 3 , the extraction ability decreased gradually, and SF Eu-152/ Am-241 decreased as 3 when [HNO 3 ] reached 4 M. Back extraction was successfully completed by using 1 M guanidine carbonate with 0.5 M ethylenediaminetetraacetic acid (EDTA) or 1 M guanidine carbonate with 0.5 M diethylenetriaminepentaacetic acid (DTPA), respectively. Slope analysis revealed a 1:3 complex was formed. Effect of temperature further clarified the extraction process was exothermic.
合成了一种基于二乙醇酰胺的N, N ' -二甲基- N, N ' -二-2-苯基乙基二甘醇酰胺(MPEDGA)萃取剂，并将其溶解于1-丁基-3-甲基咪唑非氟丁磺酸盐([c4mim][NfO])中制备萃取相。研究了其在硝酸溶液中Am-241与Eu-152的分离性能。萃取动力学快速，可在15 min内达到平衡。当[hno3] = 0.1 M时，eu152 / Am-241的最大SF为124。随着hno3浓度的增加，萃取能力逐渐降低，当[hno3]浓度达到4 M时，SF Eu-152/ Am-241降低为3，分别用1 M碳酸胍与0.5 M乙二胺四乙酸(EDTA)或1 M碳酸胍与0.5 M二乙三胺五乙酸(DTPA)完成反萃取。坡度分析显示形成了1:3的络合物。温度的影响进一步明确了提取过程是放热的。
{"title":"Selective Separation of Trivalent Europium(III) from Americium(III) using N,N′Dimethyl-N,N′-di-2-phenylethyl-diglycol Amide (MPEDGA) Extractant in Ionic Liquid","authors":"Seongyun Kim, Tadayuki Takahashi, Hao Wu","doi":"10.15261/SERDJ.28.49","DOIUrl":"https://doi.org/10.15261/SERDJ.28.49","url":null,"abstract":"A diglycolamide based N , N ′ -Dimethyl- N , N ′ -di-2-phenylethyl-diglycol amide (MPEDGA) extractant was synthesized and dissolved into 1-butyl-3-methylimidazolium nonafluorobutanesulfonate ([C 4 mim][NfO]) to prepare the extraction phase. Its separation performance of Am-241 with Eu-152 in nitric acid solution was investigated. The extraction kinetics were fast and could reach equilibrium within 15 min. When [HNO 3 ] = 0.1 M, the maximum SF Eu-152/ Am-241 was obtained as 124. Moreover, with increase in the concentration of HNO 3 , the extraction ability decreased gradually, and SF Eu-152/ Am-241 decreased as 3 when [HNO 3 ] reached 4 M. Back extraction was successfully completed by using 1 M guanidine carbonate with 0.5 M ethylenediaminetetraacetic acid (EDTA) or 1 M guanidine carbonate with 0.5 M diethylenetriaminepentaacetic acid (DTPA), respectively. Slope analysis revealed a 1:3 complex was formed. Effect of temperature further clarified the extraction process was exothermic.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Ni’am, Yi-Hsien Liu, Ya-Fen Wang, Shyh-Wei Chen, G. Chang, S. You
Achmad Chusnun NI’AM1,2, Yi-Hsien LIU1, Ya-Fen WANG1,3, Shyh-Wei CHEN1,4, Gen-Mu CHANG1 and Sheng-Jie YOU1,3* 1 Department of Environmental Engineering, Chung Yuan Christian University, 200 Chung Pei Road, ChungLi 320, Taiwan; 2 Department of Civil Engineering, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li 320, Taiwan; 3Research and Development Center for Membrane Technology, Chung Yuan Christian University, 493 Xinzhong N. Road, Chung-Li 320 Taiwan; 4 Environmental Protection Administration, Executive Yuan, Taipei 100, Taiwan (Received September 28, 2019; Accepted October 21, 2019)
Achmad Chusnun NI 'AM1,2，刘义贤1，王亚芬1,3，陈世伟1,4，常根木1，游胜杰1,3* 1中原基督教大学环境工程系，台湾中立市中培路200号;2中原基督教大学土木工程系，忠里忠培路200号，台湾忠里320;3中原基督教大学膜技术研究与开发中心，台湾中黎市新中北路493号;4行政院环境保护署，台北市100(2019年9月28日收稿;接受2019年10月21日)
{"title":"Recovery of Neodymium from Waste Permanent Magnets by Hydrometallurgy Using Hollow Fibre Supported Liquid Membranes","authors":"A. Ni’am, Yi-Hsien Liu, Ya-Fen Wang, Shyh-Wei Chen, G. Chang, S. You","doi":"10.15261/serdj.27.69","DOIUrl":"https://doi.org/10.15261/serdj.27.69","url":null,"abstract":"Achmad Chusnun NI’AM1,2, Yi-Hsien LIU1, Ya-Fen WANG1,3, Shyh-Wei CHEN1,4, Gen-Mu CHANG1 and Sheng-Jie YOU1,3* 1 Department of Environmental Engineering, Chung Yuan Christian University, 200 Chung Pei Road, ChungLi 320, Taiwan; 2 Department of Civil Engineering, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li 320, Taiwan; 3Research and Development Center for Membrane Technology, Chung Yuan Christian University, 493 Xinzhong N. Road, Chung-Li 320 Taiwan; 4 Environmental Protection Administration, Executive Yuan, Taipei 100, Taiwan (Received September 28, 2019; Accepted October 21, 2019)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The properties of four different extractants, TODGA ( N,N,N',N' -tetraoctyl-diglycolamide), T2EHDGA ( N,N,N',N' -tetraisooctyl-diglycolamide), DPDODGA ( N,N' -dipropyl- N,N' -dioctyl-diglycolamide) and DIPDODGA ( N,N' -diisopropyl- N,N' -dioctyl-diglycolamide), to extract heavy rare earth metal ions in hydrochloric acid were studied to understand the relationship between the chemical structure of the extractant and the extraction properties of rare earth metal ions. The extraction order of heavy rare earths in n -octane: n -octanol = 9:1 diluent was as follows: DIPDODGA > DPDODGA > TODGA > T2EHDGA. Alkyl chain shows great influence on extraction ability and the extractants with short chain can effectively extract heavy rare earth ions even at a concentration of less than 1.0 mol/L. The extraction mechanism was proposed with the results of slope methods, IR (Infrared) spectrometer and DFT (Density Functional Theory) theoretical study. T2EHDGA forms binuclear and the other three extractants form mononuclear extracted species with heavy rare earth ions.
{"title":"Effect of Diglycolamide Ligands Structure on Extraction Performance of Heavy Rare Earth Ions","authors":"Huihui Du, Xiujing Peng, Yu Cui, Guoxin Sun","doi":"10.15261/serdj.27.81","DOIUrl":"https://doi.org/10.15261/serdj.27.81","url":null,"abstract":"The properties of four different extractants, TODGA ( N,N,N',N' -tetraoctyl-diglycolamide), T2EHDGA ( N,N,N',N' -tetraisooctyl-diglycolamide), DPDODGA ( N,N' -dipropyl- N,N' -dioctyl-diglycolamide) and DIPDODGA ( N,N' -diisopropyl- N,N' -dioctyl-diglycolamide), to extract heavy rare earth metal ions in hydrochloric acid were studied to understand the relationship between the chemical structure of the extractant and the extraction properties of rare earth metal ions. The extraction order of heavy rare earths in n -octane: n -octanol = 9:1 diluent was as follows: DIPDODGA > DPDODGA > TODGA > T2EHDGA. Alkyl chain shows great influence on extraction ability and the extractants with short chain can effectively extract heavy rare earth ions even at a concentration of less than 1.0 mol/L. The extraction mechanism was proposed with the results of slope methods, IR (Infrared) spectrometer and DFT (Density Functional Theory) theoretical study. T2EHDGA forms binuclear and the other three extractants form mononuclear extracted species with heavy rare earth ions.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"82 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. L. Firmansyah, Wataru Yoshida, Takafumi Hanada, M. Goto
Mochamad L. FIRMANSYAH1,2, Wataru YOSHIDA2, Takafumi HANADA2 and Masahiro GOTO2,3 * 1Department of Chemistry, Faculty of Science and Technology, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia; 2Department of Applied Chemistry, Graduate School of Engineering; 3Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan (Received October 23, 2019; Accepted December 9, 2019)
Mochamad L. firmansyah 1,2, Wataru yoshida a2, Takafumi HANADA2, Masahiro goto 2,3 * 1日本国立大学化学与技术学院化学系，吉林大学，Jl。红外博士。苏加诺，泗水60115，印度尼西亚;2工程研究生院应用化学系;3九州大学未来化学研究中心，日本福冈西区元冈744号，819-0395(收于2019年10月23日;接受2019年12月9日)
{"title":"Application of Ionic Liquids in Solvent Extraction of Platinum Group Metals","authors":"M. L. Firmansyah, Wataru Yoshida, Takafumi Hanada, M. Goto","doi":"10.15261/serdj.27.1","DOIUrl":"https://doi.org/10.15261/serdj.27.1","url":null,"abstract":"Mochamad L. FIRMANSYAH1,2, Wataru YOSHIDA2, Takafumi HANADA2 and Masahiro GOTO2,3 * 1Department of Chemistry, Faculty of Science and Technology, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia; 2Department of Applied Chemistry, Graduate School of Engineering; 3Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan (Received October 23, 2019; Accepted December 9, 2019)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Saki Fukuma, T. Shimanouchi, K. Yasuhara, Y. Kimura
The partitioning behavior of horseradish peroxidase (HRP) to phospholipid- and surfactant vesicles has been analyzed. Peripheral binding of the zwitterionic phospholipid vesicle membranes is proposed with insertion into the membrane interior of negatively charged surfactant vesicles, resulting from non-electrostatic interaction. The insertion of HRP is interpreted by considering the interaction between headgroups of phospholipid and between headgroups of surfactant.
{"title":"Analysis of the Partitioning Behavior of Horseradish Peroxidase to Phospholipid and Surfactant Membranes","authors":"Saki Fukuma, T. Shimanouchi, K. Yasuhara, Y. Kimura","doi":"10.15261/serdj.27.113","DOIUrl":"https://doi.org/10.15261/serdj.27.113","url":null,"abstract":"The partitioning behavior of horseradish peroxidase (HRP) to phospholipid- and surfactant vesicles has been analyzed. Peripheral binding of the zwitterionic phospholipid vesicle membranes is proposed with insertion into the membrane interior of negatively charged surfactant vesicles, resulting from non-electrostatic interaction. The insertion of HRP is interpreted by considering the interaction between headgroups of phospholipid and between headgroups of surfactant.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhang Kuifang, Yuping Zeng, Liu Zhiqiang, Cao Hongyang, Zhu Wei, Guo Qiusong
Kuifang ZHANG 1,3,4, Yuping ZENG 2, Zhiqiang LIU 1,3,4*, Hongyang CAO 1,3,4, Wei ZHU 1,3,4 and Qiusong GUO 1,3,4 1Guangdong Research Institute of Rare Metals, Guangzhou 510650, China; 2Department of Radiology, Guangzhou Universal Medical Imaging Diagnostic Center, Guangzhou 510080, China; 3Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangzhou 510650, China; 4State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Guangzhou 510650, China (Received January 23, 2019; Accepted April 22, 2019)
{"title":"Removal of Radionuclide Uranium from South China’s Ion-adsorption Rare Earth Leach Liquor Using Solvent Extraction with Naphthenic Acid","authors":"Zhang Kuifang, Yuping Zeng, Liu Zhiqiang, Cao Hongyang, Zhu Wei, Guo Qiusong","doi":"10.15261/serdj.27.39","DOIUrl":"https://doi.org/10.15261/serdj.27.39","url":null,"abstract":"Kuifang ZHANG 1,3,4, Yuping ZENG 2, Zhiqiang LIU 1,3,4*, Hongyang CAO 1,3,4, Wei ZHU 1,3,4 and Qiusong GUO 1,3,4 1Guangdong Research Institute of Rare Metals, Guangzhou 510650, China; 2Department of Radiology, Guangzhou Universal Medical Imaging Diagnostic Center, Guangzhou 510080, China; 3Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangzhou 510650, China; 4State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Guangzhou 510650, China (Received January 23, 2019; Accepted April 22, 2019)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Sasaki, Y. Ban, Keisuke Morita, M. Matsumiya, Ryoma Ono, H. Shiroishi
Mutual separation technique of Dy and Nd in Nd magnets is studied. Dy is more valuable than Nd, and therefore, Dy should be isolated and reused. Lanthanide elements can be extracted thoroughly by using diglycolamide (DGA) extractants, and we use this reagent to recover and isolate Dy. N,N,N’,N’ -Tetradodecyl-DGA (TDdDGA) has a relatively high separation factor (SF) between Dy and Nd (SF: over 10) in the HNO 3 extraction system, so multi-step extraction using TDdDGA is applied to mutually separate them. In the present study, by using the condition, four extraction steps, organic phase: 0.1 M TDdDGA in n -dodecane, aqueous phase: 0.3 M HNO 3 , 92 % Dy can be recovered with 0.7 % co-extraction of Nd.
研究了钕磁体中镝和钕的相互分离技术。Dy比Nd更有价值，因此，Dy应该被分离和重用。二甘醇酰胺(DGA)萃取剂可以彻底地提取镧系元素，我们使用该试剂回收分离了Dy,N,N '，N ' -十四烷基DGA (TDdDGA)在hno3萃取体系中Dy和Nd的分离因子(SF)较高(SF: > 10)，因此采用TDdDGA多步萃取将两者相互分离。本研究采用四步萃取条件，即有机相:0.1 M TDdDGA在正十二烷中，水相:0.3 M hno3，共萃取0.7% Nd，可回收92%的Dy。
{"title":"Preliminary Study on Separation of Dy and Nd by Multi-Step Extraction Using TDdDGA","authors":"Y. Sasaki, Y. Ban, Keisuke Morita, M. Matsumiya, Ryoma Ono, H. Shiroishi","doi":"10.15261/serdj.27.63","DOIUrl":"https://doi.org/10.15261/serdj.27.63","url":null,"abstract":"Mutual separation technique of Dy and Nd in Nd magnets is studied. Dy is more valuable than Nd, and therefore, Dy should be isolated and reused. Lanthanide elements can be extracted thoroughly by using diglycolamide (DGA) extractants, and we use this reagent to recover and isolate Dy. N,N,N’,N’ -Tetradodecyl-DGA (TDdDGA) has a relatively high separation factor (SF) between Dy and Nd (SF: over 10) in the HNO 3 extraction system, so multi-step extraction using TDdDGA is applied to mutually separate them. In the present study, by using the condition, four extraction steps, organic phase: 0.1 M TDdDGA in n -dodecane, aqueous phase: 0.3 M HNO 3 , 92 % Dy can be recovered with 0.7 % co-extraction of Nd.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Water molecules around the cobalt(II) (Co) and manganese(II) (Mn) complexes of the hydroxyoxime extractant, LIX63 and/or of the carboxylic acid extractant, Versatic acid 10 (VA10), in cyclohexane solvent were investigated using molecular dynamics calculations with simulated annealing. For the complexes of VA10, water molecules were coordinated to the metal ions, and VA10 molecules were found around the complexes. For the complexes of LIX63, a few water molecules were located at ~ 0.4 nm from the metal ions, in addition to the LIX63 molecules were also coordinated to the metal ions. Our trajectory analysis indicates that the water molecules at ~ 0.4 nm are hydrogen-bonded to LIX63 or other water molecules, suggesting that the hydrogen bonding contributes to the stabilization of the metal complex.
{"title":"Effects of Water Molecules on Metal Complexes of Hydroxyoxime and Carboxylic Acid Extractants","authors":"Y. Nishihara, S. Yoshio","doi":"10.15261/serdj.27.25","DOIUrl":"https://doi.org/10.15261/serdj.27.25","url":null,"abstract":"Water molecules around the cobalt(II) (Co) and manganese(II) (Mn) complexes of the hydroxyoxime extractant, LIX63 and/or of the carboxylic acid extractant, Versatic acid 10 (VA10), in cyclohexane solvent were investigated using molecular dynamics calculations with simulated annealing. For the complexes of VA10, water molecules were coordinated to the metal ions, and VA10 molecules were found around the complexes. For the complexes of LIX63, a few water molecules were located at ~ 0.4 nm from the metal ions, in addition to the LIX63 molecules were also coordinated to the metal ions. Our trajectory analysis indicates that the water molecules at ~ 0.4 nm are hydrogen-bonded to LIX63 or other water molecules, suggesting that the hydrogen bonding contributes to the stabilization of the metal complex.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"6 1","pages":"25-38"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75471229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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