An ultrasonic assisted microchannel extraction (UAME) method was developed for the extraction of Fe(III) from wet-process phosphoric acid with di(2-ethylhexyl)phosphoric acid (D2EHPA). The influences of ultrasonic power, extractant concentration, water phase velocity and the ratio of the organic and aqueous phases (O/A) on the extraction rate of Fe(III) were systematically studied. The results showed that the extraction efficiency of Fe(III) reached 91.08%, which was significantly higher than that for ultrasound extraction and microchannel extraction respectively. Response surface methodology was adopted to obtain the optimal conditions and to evaluate the significance of variables affecting the extraction efficiency. The extraction efficiency of Fe(III) reached 92.24% under the following optimum conditions: extractant concentration, 2.1 mol/L; aqueous phase velocity, 0.055 mL/min; ratio of organic phase and aqueous phase, 2.98.
{"title":"Ultrasonic Assisted Microchannel Extraction of Fe(III) from Wet-Process Phosphoric Acid","authors":"Shuai Zhang, Xingbin Lv, Qi Xia, Jiangpo Zhang, Jianjun Chen, Daijun Liu","doi":"10.15261/SERDJ.26.51","DOIUrl":"https://doi.org/10.15261/SERDJ.26.51","url":null,"abstract":"An ultrasonic assisted microchannel extraction (UAME) method was developed for the extraction of Fe(III) from wet-process phosphoric acid with di(2-ethylhexyl)phosphoric acid (D2EHPA). The influences of ultrasonic power, extractant concentration, water phase velocity and the ratio of the organic and aqueous phases (O/A) on the extraction rate of Fe(III) were systematically studied. The results showed that the extraction efficiency of Fe(III) reached 91.08%, which was significantly higher than that for ultrasound extraction and microchannel extraction respectively. Response surface methodology was adopted to obtain the optimal conditions and to evaluate the significance of variables affecting the extraction efficiency. The extraction efficiency of Fe(III) reached 92.24% under the following optimum conditions: extractant concentration, 2.1 mol/L; aqueous phase velocity, 0.055 mL/min; ratio of organic phase and aqueous phase, 2.98.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.51","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093676","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}
Amine extractants are effective for extracting precious metals in hydrochloric-acid media. We developed a novel secondary-amine extractant 2-ethylhexylfurfurylamine (EH-A-F). EH-A-F showed a higher Pd(II) extractability compared with many secondary-amine compounds, such as di(2-ethylhexyl)amine. Because the Pd(II) extraction from solutions of lower hydrochloric-acid concentration is small, Pd(II) and Au(III) can be extracted selectively from the trivalent metal ions Fe(III), Ga(III), and In(III). Because the extractability of hydrochloric acid using EH-A-F was lower than that of a competitive amine compound, benzyl 2ethylhexylamine, EH-A-F was found to show a higher Pd(II) extractability because of its moderate basicity. Slope analysis for Pd(II) extraction showed that the complex stoichiometry was 2:1 for EH-A-F and Pd(II). The Pd(II) extracted by using EH-A-F was stripped quantitatively by using aqueous thiourea solution.
{"title":"Extraction Behavior of Precious Metals in Hydrochloric-acid Media Using a Novel Amine Extractant Bearing a Furan Group","authors":"T. Oshima, Seishiro Iwao, Naoki Matsuo, K. Ohe","doi":"10.15261/SERDJ.26.69","DOIUrl":"https://doi.org/10.15261/SERDJ.26.69","url":null,"abstract":"Amine extractants are effective for extracting precious metals in hydrochloric-acid media. We developed a novel secondary-amine extractant 2-ethylhexylfurfurylamine (EH-A-F). EH-A-F showed a higher Pd(II) extractability compared with many secondary-amine compounds, such as di(2-ethylhexyl)amine. Because the Pd(II) extraction from solutions of lower hydrochloric-acid concentration is small, Pd(II) and Au(III) can be extracted selectively from the trivalent metal ions Fe(III), Ga(III), and In(III). Because the extractability of hydrochloric acid using EH-A-F was lower than that of a competitive amine compound, benzyl 2ethylhexylamine, EH-A-F was found to show a higher Pd(II) extractability because of its moderate basicity. Slope analysis for Pd(II) extraction showed that the complex stoichiometry was 2:1 for EH-A-F and Pd(II). The Pd(II) extracted by using EH-A-F was stripped quantitatively by using aqueous thiourea solution.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.69","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093723","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}
Takafumi HANADA1, Minako IWAKUMA3 and Masahiro GOTO1,2 1Department of Applied Chemistry, Graduate School of Engineering, 2Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; 3Department of Chemical Engineering, National Institute of Technology, Miyakonojo College, 473-1 Yoshio-cho, Miyakonojo City, Miyazaki 8858567, Japan (Received January 14, 2019; Accepted February 22, 2019)
{"title":"Multifunctional Effect of the Polymer Extractant Thiomethylbenzoxazoyl-α-Methylstyrene on the Extraction of Au(III)","authors":"Takafumi Hanada, Minako Iwakuma, M. Goto","doi":"10.15261/SERDJ.26.91","DOIUrl":"https://doi.org/10.15261/SERDJ.26.91","url":null,"abstract":"Takafumi HANADA1, Minako IWAKUMA3 and Masahiro GOTO1,2 1Department of Applied Chemistry, Graduate School of Engineering, 2Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; 3Department of Chemical Engineering, National Institute of Technology, Miyakonojo College, 473-1 Yoshio-cho, Miyakonojo City, Miyazaki 8858567, Japan (Received January 14, 2019; Accepted February 22, 2019)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.91","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093742","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 -lactam antibiotics such as penicillin and cephalosporin account for over 65% of the market. Development of a more effective separation technique is desired to extract and purify the biologically active cephalosporin antibiotics. In this study, to recover cephalosporin antibiotics, cephalosporin C and cephalexin, an aqueous two-phase system (ATPS) composed of a water-miscible organic solvent and salts was used. For cephalosporin C extraction with the ATPS, the extent of extraction of cephalosporin C was small because of its high hydrophilicity. For cephalexin, which is more hydrophobic, it was successfully extracted with ATPS. From binodal experiments, tetrahydrofuran (THF), 1-propanol and acetone were selected as the candidates for the extraction solvent. In the extraction experiments, THF was found to be suitable because it gave the highest extractability of cephalexin and the lowest water content in the top (solvent) phase among the candidates. When the initial volume ratio of water to solvent was unity, the maximum distribution ratio was 3.13. The value of the distribution ratio increased up to 9.87 with increasing initial volume ratio. The ATPS composed of a water-miscible organic solvent and salt was found to be promising for purification of antibiotics under such mild conditions.
{"title":"Extraction of Cephalosporin Antibiotics with Aqueous Two-phase Systems Composed of Water-miscible Organic Solvents and Salts","authors":"M. Matsumoto, T. Ueda","doi":"10.15261/SERDJ.26.63","DOIUrl":"https://doi.org/10.15261/SERDJ.26.63","url":null,"abstract":"The -lactam antibiotics such as penicillin and cephalosporin account for over 65% of the market. Development of a more effective separation technique is desired to extract and purify the biologically active cephalosporin antibiotics. In this study, to recover cephalosporin antibiotics, cephalosporin C and cephalexin, an aqueous two-phase system (ATPS) composed of a water-miscible organic solvent and salts was used. For cephalosporin C extraction with the ATPS, the extent of extraction of cephalosporin C was small because of its high hydrophilicity. For cephalexin, which is more hydrophobic, it was successfully extracted with ATPS. From binodal experiments, tetrahydrofuran (THF), 1-propanol and acetone were selected as the candidates for the extraction solvent. In the extraction experiments, THF was found to be suitable because it gave the highest extractability of cephalexin and the lowest water content in the top (solvent) phase among the candidates. When the initial volume ratio of water to solvent was unity, the maximum distribution ratio was 3.13. The value of the distribution ratio increased up to 9.87 with increasing initial volume ratio. The ATPS composed of a water-miscible organic solvent and salt was found to be promising for purification of antibiotics under such mild conditions.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.63","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093685","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}
Tomoya Suzuki, H. Narita, Takeshi Ogata, Hideya Suzuki, T. Matsumura, Tohru Kobayashi, H. Shiwaku, T. Yaita
The ability of AMP03, a styrene–divinylbenzene copolymer functionalized with N,N,N -trimethylglycine moieties, to adsorb Pd(II) from HNO 3 solutions was investigated to elucidate the affinity of N,N,N -trimethylglycine for Pd(II). AMP03 effectively adsorbed Pd(II) from 0.10–0.50 M solutions in HNO 3 , and the adsorption ability decreased with increasing HNO 3 concentration owing to competitive adsorption of the acid. In contrast, the presence of added NO 3− increased the Pd(II) adsorption ability of the copolymer. On the basis of slope analysis of data for Pd(II) and HNO 3 at adsorption equilibrium, the Pd(II)/NO 3− /ligand stoichiometry of the adsorbed Pd(II) species was determined to be 1 : 2 : 1. Structural studies performed by means of Fourier transform infrared spectroscopy and extended X-ray absorption fine structure spectroscopy revealed that the N,N,N -trimethylglycine moieties on AMP03 and NO 3− coordinated to Pd(II) via their oxygen atoms. The adsorption selectivity of AMP03 for Pd(II), Ni(II), Cu(II), and Fe(III) was compared with the selectivities of commercially available carboxylic acid and iminodiacetic acid resins. AMP03 selectively adsorbed Pd(II) over Ni(II), Cu(II), and Fe(III) compared with that of the other resins. Our results suggest that AMP03 can be used for selective recovery of Pd(II) from HNO 3 solution.
{"title":"Mechanism of Palladium(II) Adsorption from Nitric Acid Solutions by a Styrene-Divinylbenzene Copolymer Functionalized with N,N,N-Trimethylglycine","authors":"Tomoya Suzuki, H. Narita, Takeshi Ogata, Hideya Suzuki, T. Matsumura, Tohru Kobayashi, H. Shiwaku, T. Yaita","doi":"10.15261/SERDJ.26.11","DOIUrl":"https://doi.org/10.15261/SERDJ.26.11","url":null,"abstract":"The ability of AMP03, a styrene–divinylbenzene copolymer functionalized with N,N,N -trimethylglycine moieties, to adsorb Pd(II) from HNO 3 solutions was investigated to elucidate the affinity of N,N,N -trimethylglycine for Pd(II). AMP03 effectively adsorbed Pd(II) from 0.10–0.50 M solutions in HNO 3 , and the adsorption ability decreased with increasing HNO 3 concentration owing to competitive adsorption of the acid. In contrast, the presence of added NO 3− increased the Pd(II) adsorption ability of the copolymer. On the basis of slope analysis of data for Pd(II) and HNO 3 at adsorption equilibrium, the Pd(II)/NO 3− /ligand stoichiometry of the adsorbed Pd(II) species was determined to be 1 : 2 : 1. Structural studies performed by means of Fourier transform infrared spectroscopy and extended X-ray absorption fine structure spectroscopy revealed that the N,N,N -trimethylglycine moieties on AMP03 and NO 3− coordinated to Pd(II) via their oxygen atoms. The adsorption selectivity of AMP03 for Pd(II), Ni(II), Cu(II), and Fe(III) was compared with the selectivities of commercially available carboxylic acid and iminodiacetic acid resins. AMP03 selectively adsorbed Pd(II) over Ni(II), Cu(II), and Fe(III) compared with that of the other resins. Our results suggest that AMP03 can be used for selective recovery of Pd(II) from HNO 3 solution.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.11","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093277","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}
For the separation of petroleum-derived heavy fractions by solvent extraction, the liquid-liquid equilibrium extraction of model heavy fractions, binary and multicomponent model oils, with aqueous methanol solutions was measured, and the effects of nitrogen heterocyclic and other coexisting compounds on the equilibrium extraction were studied. The distribution coefficient increased in the following order of the group compounds; alkanes, aromatics and heterocyclic compounds when the carbon numbers in the molecules of interest were same, and it decreased with an increase in the carbon number of the compound among the respective groups. The coefficients for indoles and quinolines were comparable, and those of carbazoles were smaller. The liquid-liquid equilibrium of nitrogen heterocyclic compounds with the multicomponent system was similar with that with the binary system, and the approximate trend of liquid-liquid equilibrium in the multicomponent system could be evaluated based on the results of simpler systems.
{"title":"Separation of Model Petroleum Heavy Fraction by Equilibrium Extraction","authors":"H. Habaki, Tomonori Masuda, R. Egashira","doi":"10.15261/SERDJ.26.35","DOIUrl":"https://doi.org/10.15261/SERDJ.26.35","url":null,"abstract":"For the separation of petroleum-derived heavy fractions by solvent extraction, the liquid-liquid equilibrium extraction of model heavy fractions, binary and multicomponent model oils, with aqueous methanol solutions was measured, and the effects of nitrogen heterocyclic and other coexisting compounds on the equilibrium extraction were studied. The distribution coefficient increased in the following order of the group compounds; alkanes, aromatics and heterocyclic compounds when the carbon numbers in the molecules of interest were same, and it decreased with an increase in the carbon number of the compound among the respective groups. The coefficients for indoles and quinolines were comparable, and those of carbazoles were smaller. The liquid-liquid equilibrium of nitrogen heterocyclic compounds with the multicomponent system was similar with that with the binary system, and the approximate trend of liquid-liquid equilibrium in the multicomponent system could be evaluated based on the results of simpler systems.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.35","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093622","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}
Separation of scandium (Sc) from yttrium (Y) in aqueous chloride media was investigated by solvent extraction with bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272). Conventional slope analysis method revealed the extraction equilibrium formulation of the metals. Sc is more strongly extracted than Y by Cyanex 272, and the separation factor of the metals is quite high at 2.82 × 105. Complete stripping of Sc from the loaded organic solution of Cyanex272 could not be achieved, even with a high concentration of hydrochloric acid. Addition of 1-octanol as a modifier to the organic phase decreased the extractability of Sc, leading to successful stripping of Sc from the loaded organic solution.
{"title":"Separation of Scandium from Yttrium in Aqueous Chloride Media by Solvent Extraction with an Acidic Phosphinate Extractant","authors":"J. Moon, Emi Yamada, S. Nishihama, K. Yoshizuka","doi":"10.15261/SERDJ.26.99","DOIUrl":"https://doi.org/10.15261/SERDJ.26.99","url":null,"abstract":"Separation of scandium (Sc) from yttrium (Y) in aqueous chloride media was investigated by solvent extraction with bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272). Conventional slope analysis method revealed the extraction equilibrium formulation of the metals. Sc is more strongly extracted than Y by Cyanex 272, and the separation factor of the metals is quite high at 2.82 × 105. Complete stripping of Sc from the loaded organic solution of Cyanex272 could not be achieved, even with a high concentration of hydrochloric acid. Addition of 1-octanol as a modifier to the organic phase decreased the extractability of Sc, leading to successful stripping of Sc from the loaded organic solution.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.99","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093837","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}
To date, many kinds of chelating extractants have been developed, however, many of the good extractants are insoluble in aliphatic solvents. In the present study, cyclopentyl methyl ether (CPME) was assessed as a solvent for extractants to develop new solvent extraction systems. Many of the extractants (100 mM) were soluble in CPME. The extraction behavior of metal ions using a typical chelating extractant, 8-quinolinol (HQ) in CPME, was studied. The extraction profiles of metal ions using HQ in CPME were similar to those in toluene, whereas metal ions were extracted using HQ in 1-octanol and chloroform under lower pH conditions. The extraction reaction of In(III) using HQ in CPME was confirmed by slope analysis. A 3 : 1 complex between HQ and In(III) was formed in CPME by a proton exchange reaction, and the extraction equilibrium constant was determined. In(III), extracted using HQ in CPME, was quantitatively recovered using mineral acids. From the results, CPME was found to be a potential alternative solvent to other toxic organic solvents for the development of a solvent extraction system.
{"title":"Extraction Behavior of Metal Cations Using 8-Quinolinol as an Extractant in Cyclopentyl Methyl Ether","authors":"T. Oshima, Takao Koyama, K. Ohe, Noriyasu Otsuki","doi":"10.15261/SERDJ.26.1","DOIUrl":"https://doi.org/10.15261/SERDJ.26.1","url":null,"abstract":"To date, many kinds of chelating extractants have been developed, however, many of the good extractants are insoluble in aliphatic solvents. In the present study, cyclopentyl methyl ether (CPME) was assessed as a solvent for extractants to develop new solvent extraction systems. Many of the extractants (100 mM) were soluble in CPME. The extraction behavior of metal ions using a typical chelating extractant, 8-quinolinol (HQ) in CPME, was studied. The extraction profiles of metal ions using HQ in CPME were similar to those in toluene, whereas metal ions were extracted using HQ in 1-octanol and chloroform under lower pH conditions. The extraction reaction of In(III) using HQ in CPME was confirmed by slope analysis. A 3 : 1 complex between HQ and In(III) was formed in CPME by a proton exchange reaction, and the extraction equilibrium constant was determined. In(III), extracted using HQ in CPME, was quantitatively recovered using mineral acids. From the results, CPME was found to be a potential alternative solvent to other toxic organic solvents for the development of a solvent extraction system.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093194","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}
K. Ohto, Takuyou Yoshinaga, Hiroaki Furugou, Shintaro Morisada, H. Kawakita, K. Inoue
A sulfide type trident molecule together with a monopodal compound has been prepared to investigate the extraction behavior of silver. The present trident molecule has a weaker extraction ability than thiol and dithioether derivatives of previously reported tripodal extraction reagents. On the contrary, it exhibited a higher extraction ability than the corresponding monopodal molecule due to the structural effect of the trident framework. Both sulfide molecules did not exhibit any pH dependency for silver extraction. The trident molecule showed a 1 : 1 stoichiometry (trident molecule : silver), while the monopodal molecule gave a 2 : 1 stoichiometry (monopodal molecule : silver). The coordination site of the trident molecule was confirmed by 1 H-NMR spectra before and after silver loading. The signal shifts for the protons of the methylene groups bounded to the sulfur atoms for the trident and monopodal compounds before and after silver loading were correlated with the formation of complexes. From the comparison of both molecules, the peak shift for the trident molecule included contributions not only from the functional groups but also from the structure of the trident framework.
{"title":"Silver Extraction with Sulfide Type Trident Compounds","authors":"K. Ohto, Takuyou Yoshinaga, Hiroaki Furugou, Shintaro Morisada, H. Kawakita, K. Inoue","doi":"10.15261/SERDJ.25.71","DOIUrl":"https://doi.org/10.15261/SERDJ.25.71","url":null,"abstract":"A sulfide type trident molecule together with a monopodal compound has been prepared to investigate the extraction behavior of silver. The present trident molecule has a weaker extraction ability than thiol and dithioether derivatives of previously reported tripodal extraction reagents. On the contrary, it exhibited a higher extraction ability than the corresponding monopodal molecule due to the structural effect of the trident framework. Both sulfide molecules did not exhibit any pH dependency for silver extraction. The trident molecule showed a 1 : 1 stoichiometry (trident molecule : silver), while the monopodal molecule gave a 2 : 1 stoichiometry (monopodal molecule : silver). The coordination site of the trident molecule was confirmed by 1 H-NMR spectra before and after silver loading. The signal shifts for the protons of the methylene groups bounded to the sulfur atoms for the trident and monopodal compounds before and after silver loading were correlated with the formation of complexes. From the comparison of both molecules, the peak shift for the trident molecule included contributions not only from the functional groups but also from the structure of the trident framework.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"67 1","pages":"71-78"},"PeriodicalIF":0.7,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89310438","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}
Yoichi Watanabe, M. Honda, Takuma Higashiura, Tetsuya Fukaya, S. Machmudah, Wahyudiono, H. Kanda, M. Goto
Yo WATANABE1, Masaki HONDA2,*, Takuma HIGASHIURA3, Tetsuya FUKAYA3, Siti MACHMUDAH4, WAHYUDIONO1, Hideki KANDA1 and Motonobu GOTO1,* 1Department of Materials Process Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 4648603, Japan; 2Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; 3Innovation Division, Kagome Company, Limited, Nishitomiyama, Nasushiobara 329–2762, Japan; 4Chemical Engineering Department, Sepuluh Nopember Institute of Technology, Kampus ITS Sukolilo, Surabaya 60111, Indonesia (Received April 26, 2017; Accepted June 26, 2017)
{"title":"Rapid and Selective Concentration of Lycopene Z -isomers from Tomato Pulp by Supercritical CO 2 with Co-solvents","authors":"Yoichi Watanabe, M. Honda, Takuma Higashiura, Tetsuya Fukaya, S. Machmudah, Wahyudiono, H. Kanda, M. Goto","doi":"10.15261/SERDJ.25.47","DOIUrl":"https://doi.org/10.15261/SERDJ.25.47","url":null,"abstract":"Yo WATANABE1, Masaki HONDA2,*, Takuma HIGASHIURA3, Tetsuya FUKAYA3, Siti MACHMUDAH4, WAHYUDIONO1, Hideki KANDA1 and Motonobu GOTO1,* 1Department of Materials Process Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 4648603, Japan; 2Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; 3Innovation Division, Kagome Company, Limited, Nishitomiyama, Nasushiobara 329–2762, Japan; 4Chemical Engineering Department, Sepuluh Nopember Institute of Technology, Kampus ITS Sukolilo, Surabaya 60111, Indonesia (Received April 26, 2017; Accepted June 26, 2017)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"34 1","pages":"47-57"},"PeriodicalIF":0.7,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84837836","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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