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Conghua Yi - One of the best experts on this subject based on the ideXlab platform.
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Salting-Out extraction of bio-based isobutanol from an aqueous solution
Journal of Chemical Technology and Biotechnology, 2018Co-Authors: Conghua Yi, Shaoqu Xie, Yulei Zhang, Wenli Song, Xueqing QiuAbstract:© 2017 Society of Chemical Industry. BACKGROUND: More efficient downstream separation technologies need to be explored due to the low concentration of bio-based isobutanol in the fermentation broth. The Salting-Out extraction of isobutanol from its aqueous solution by employing nine salts (K 4 P 2 O 7 ·3H 2 O, K 2 HPO 4 ·3H 2 O, K 3 PO 4 ·3H 2 O, K 2 CO 3 , K 2 SO 4 , KCl, Na 2 CO 3 , Na 2 SO 4 , NaCl) as Salting-Out agents and three organic solvents (2-ethyl-1-hexanol, cyclopentanol, 2-methyl-2-butanol) as extractants were investigated at 298.15 K. RESULTS: The recovery was greatly influenced by the salt concentration and types of salts and organic solvents. When the initial molar K 4 P 2 O 7 concentration was equal to or higher than 1.01 mol kg -1 and the mass ratio of aqueous isobutanol solution to 2-ethyl-1-hexanol was 1:1, the recovery of isobutanol reached 100%, and more than 91.62% of water was removed from the organic phase. CONCLUSION: The Salting-Out effects of different anions in nine salts were ordered in the sequence: Cl - < SO 4 2- < HPO 4 2- < CO 3 2- < PO 4 3- < P 2 O 7 4- at the same initial molar salt concentration and using the same organic solvent. 2-Ethyl-1-hexanol was verified to be the most suitable extractant. The distribution behavior and Salting-Out extraction effects can be evaluated by tie-line correlations and solubility correlation.
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Salting-Out extraction systems of ethanol and water induced by high-solubility inorganic electrolytes
Journal of Industrial and Engineering Chemistry, 2017Co-Authors: Wenli Song, Conghua YiAbstract:Abstract The Salting-Out extraction systems of ethanol and water induced by the high-solubility inorganic electrolytes were investigated at 25 °C. More than 99.90% of ethanol was salted Out into the organic phase. The salt content of the organic phase is only abOut 0.01 wt%, which is negligible for the application of the ethanol–salt Salting-Out extraction. More than 90% of water can be retained in the aqueous phase. It is concluded that the Salting-Out effects of four Salting-Out agents on the aqueous solution of ethanol are ordered in the sequence: K4P2O7 > K3PO4 > K2HPO4 > K2CO3.
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Salting‐Out extraction of bio‐based isobutanol from an aqueous solution
Journal of Chemical Technology & Biotechnology, 2017Co-Authors: Conghua Yi, Yulei Zhang, Wenli SongAbstract:BACKGROUND More efficient downstream separation technologies need to be explored due to the low concentration of bio-based isobutanol in the fermentation broth. The Salting-Out extraction of isobutanol from its aqueous solution by employing nine salts (K4P2O7∙3H2O, K2HPO4∙3H2O, K3PO4∙3H2O, K2CO3, K2SO4, KCl, Na2CO3, Na2SO4, NaCl) as Salting-Out agents and three organic solvents (2-ethyl-1-hexanol, cyclopentanol, 2-methyl-2-butanol) as extractants were investigated at 298.15K. RESULTS The recovery was influenced by the salt concentration and types of salts and organic solvents greatly. When the initial molar K4P2O7 concentration was equal to or higher than 1.01 mol∙Kg-1 and the mass ratio of aqueous isobutanol solution and 2-ethyl-1-hexanol was 1:1, the recovery of isobutanol could reach 100%, and more than 91.62% of water was removed from the organic phase. CONCLUSION The Salting-Out effects of different anions in nine salts were ordered in the sequence: Cl- < SO42- < HPO42- < CO32- < PO43- < P2O74- at the same initial molar salt concentration and the same organic solvent. 2-Ethyl-1-hexanol was verified to be the most suitable extractant. The distribution behaviors and Salting-Out extraction effects can be evaluated by the tie-line correlations and solubility correlation.
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Separation of a Biofuel: Recovery of Biobutanol by Salting‐Out and Distillation
Chemical Engineering & Technology, 2015Co-Authors: Conghua YiAbstract:The second generation biofuel butanol can be produced by acetone-butanol-ethanol (ABE) fermentation, but the separation from the broth is still challenging. Therefore, dipotassium hydrogen phosphate was investigated as Salting-Out agent. The ABE fermentation broth was enriched by a prefractionator after being preheated. The enriched ABE solution was salted Out by K2HPO4 solutions at different temperatures. The water in the supplemented ABE solution was largely removed by the Salting-Out method. The energy requirements for the prefractionator and the butanol column were significantly reduced. The total energy demand for the recovery of acetone, butanol, and ethanol by Salting-Out and subsequent distillation was optimized. With the Salting-Out process, the entire Salting-Out and distillation method turned Out to be more energy-saving than the conventional one.
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Salting‐Out of acetone, 1‐butanol, and ethanol from dilute aqueous solutions
Aiche Journal, 2015Co-Authors: Conghua YiAbstract:The Salting-Out phase equilibria for acetone, 1-butanol, and ethanol (ABE) from dilute aqueous solutions using potassium carbonate (K2CO3) and dipotassium hydrogen phosphate trihydrate (K2HPO4⋅3H2O) as Outstanding Salting-Out agents were investigated. Increasing the salt concentration strengthened the Salting-Out effects and improved the distribution coefficients of all three solvents (ABE) significantly. Temperature had a slight effect on the phase equilibria. The K2HPO4 solution (69 wt %) showed a stronger Salting-Out effect than the K2CO3 solution (56 wt %) on recovering ABE from dilute aqueous solutions. Dilute aqueous solutions containing more solvents increased the recoveries of acetone and 1-butanol, while the results showed a negligible effect on the solubility of ABE. The solubility of ABE was also correlated well with the molar number of salt per gram of water in the aqueous phase. A new equation demonstrated this satisfactorily. © 2015 American Institute of Chemical Engineers AIChE J, 61: 3470–3478, 2015
Hongxin Fu - One of the best experts on this subject based on the ideXlab platform.
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effects of Salting Out and Salting Out extraction on the separation of butyric acid
Separation and Purification Technology, 2017Co-Authors: Hongxin Fu, Xudong Wang, Juntao Shen, Jufang Wang, Shangtian YangAbstract:Abstract The effects of Salting-Out and Salting-Out extraction on the separation of butyric acid from the simulated solution were investigated. Ammonium sulfate, monosodium phosphate and calcium chloride were screened Out and showed Outstanding Salting-Out ability under acidic conditions, resulting in a butyric acid-rich top phase with a concentration multiple of 6.5–18.7 and an increased selectivity of butyric acid to acetic acid from 4 to 13.8–50.0. However, the Salting-Out effect of inorganic salt decreased with the acid concentration, indicating that this method was not effective for separation of butyric acid at low concentration. In contrast, Salting-Out extraction system composed of monosodium phosphate and ethanol exhibited excellent extraction efficiency for both butyric acid (∼99%) and acetic acid (∼90%). The partition coefficient and recovery yield of butyric acid increased with the acid concentration and system composition, while decreased with the hydrophobicity of extractant. Finally, two-step Salting-Out and Salting-Out extraction was employed, as a result, the total recovery yield of butyric acid and acetic acid were 99.4–99.5% and 88.5–88.9%, respectively.
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Salting Out extraction of carboxylic acids
Separation and Purification Technology, 2015Co-Authors: Hongxin Fu, Hu Teng, Daijia ZhangAbstract:Abstract Developing economic and feasible technology for recovery of carboxylic acids is a challenge for their industrial production. Salting-Out extraction of carboxylic acids (formic, acetic, propionic, lactic, succinic, and citric acids) was studied using a system composed of ethanol and ammonium sulfate. The system parameters influencing the extraction efficiency, such as tie line length, phase volume ratio, acid concentration, temperature, and system pH were evaluated. The results showed that partition coefficient of carboxylic acids increased or decreased linearly as tie line length increased, and strongly depended on the system pH. However, the varied phase volume ratio alone the selected tie line, acid concentration and temperature nearly had no effect on the partition coefficient of carboxylic acids in this system, although the recovery increased obviously as the phase volume ratio increased. Correlation of the hydrophobicity (ClogP) of carboxylic acids with natural logarithm of partition coefficient (ln K ), indicated that the extraction efficiency was improved as hydrophobicity of carboxylic acids increased.
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Salting Out extraction and crystallization of succinic acid from fermentation broths
Process Biochemistry, 2014Co-Authors: Hongxin FuAbstract:Abstract In this study, Salting-Out extraction (SOE) and crystallization were combined to recover succinic acid from fermentation broths. Of the different SOE systems investigated, the system consisting of organic solvents and acidic salts appeared to be more favorable. A system using acetone and ammonium sulfate was investigated to determine the effect of phase composition and pH. The highest partition coefficient (8.64) and yield of succinic acid (90.05%) were obtained by a system composed of 30% (w/w) acetone and 20% (w/w) ammonium sulfate at a pH of 3.0. Additionally, 99.03% of cells, 90.82% of soluble proteins, and 94.89% of glucose could be simultaneously removed from the fermentation broths. Interestingly, nearly 40% of the pigment was removed using the single-step Salting-Out extraction process. The analysis of the effect of pH on Salting-Out extraction indicates that a pH lower than the pK of succinic acid is beneficial for the recovery of succinic acid in an SOE system. Crystallization was performed for the purification of succinic acid at 4 °C and pH 2.0. By combining Salting-Out extraction with crystallization, an identical total yield (65%) and a higher purity (97%) of succinic acid were obtained using a synthetic fermentation broth compared with the actual fermentation broth (65% and 91%, respectively).
Li Xu - One of the best experts on this subject based on the ideXlab platform.
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miniaturized Salting Out liquid liquid extraction of sulfonamides from different matrices
Analytica Chimica Acta, 2010Co-Authors: Ming Jiang, Gao Li, Li XuAbstract:Abstract Salting-Out liquid–liquid extraction (LLE) uses water-miscible organic solvents as the extractants. The principle of it is based on the phase separation of water-miscible organic solvents from the aqueous solutions in the presence of high concentration of salts. As an effort to miniaturization, in the present study, a 1-mL syringe was employed as the phase separation device for Salting-Out LLE. Once the phase separation occurred, the upper layer could be narrowed into the needle tip by pushing the plunger; thus, the collection of the upper layer solvent was convenient. By miniaturization, the consumption of organic solvent was decreased as low as possible. Four sulfonamides were used as model analytes. The optimal Salting-Out parameters were as follows. 150 μL of acetonitrile was added to the 500 μL of sample solution containing 300 mg mL −1 sodium chloride at a pH of 6.5. This procedure afforded a convenient, fast and cost-saving operation with good cleanup ability for the model analytes. It showed promising applications for different matrices. Herein, food (honey), environmental water (river water) and biological fluid (human urine) were investigated. Satisfactory results were obtained. An additional bonus of this sample preparation method is that, owing to its water-miscible nature, the extraction solvent is compatible with various analytical systems, like gas chromatography, high-performance liquid chromatography and capillary electrophoresis.
Xueqing Qiu - One of the best experts on this subject based on the ideXlab platform.
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Salting-Out extraction of bio-based isobutanol from an aqueous solution
Journal of Chemical Technology and Biotechnology, 2018Co-Authors: Conghua Yi, Shaoqu Xie, Yulei Zhang, Wenli Song, Xueqing QiuAbstract:© 2017 Society of Chemical Industry. BACKGROUND: More efficient downstream separation technologies need to be explored due to the low concentration of bio-based isobutanol in the fermentation broth. The Salting-Out extraction of isobutanol from its aqueous solution by employing nine salts (K 4 P 2 O 7 ·3H 2 O, K 2 HPO 4 ·3H 2 O, K 3 PO 4 ·3H 2 O, K 2 CO 3 , K 2 SO 4 , KCl, Na 2 CO 3 , Na 2 SO 4 , NaCl) as Salting-Out agents and three organic solvents (2-ethyl-1-hexanol, cyclopentanol, 2-methyl-2-butanol) as extractants were investigated at 298.15 K. RESULTS: The recovery was greatly influenced by the salt concentration and types of salts and organic solvents. When the initial molar K 4 P 2 O 7 concentration was equal to or higher than 1.01 mol kg -1 and the mass ratio of aqueous isobutanol solution to 2-ethyl-1-hexanol was 1:1, the recovery of isobutanol reached 100%, and more than 91.62% of water was removed from the organic phase. CONCLUSION: The Salting-Out effects of different anions in nine salts were ordered in the sequence: Cl - < SO 4 2- < HPO 4 2- < CO 3 2- < PO 4 3- < P 2 O 7 4- at the same initial molar salt concentration and using the same organic solvent. 2-Ethyl-1-hexanol was verified to be the most suitable extractant. The distribution behavior and Salting-Out extraction effects can be evaluated by tie-line correlations and solubility correlation.
Wenli Song - One of the best experts on this subject based on the ideXlab platform.
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Salting-Out extraction of bio-based isobutanol from an aqueous solution
Journal of Chemical Technology and Biotechnology, 2018Co-Authors: Conghua Yi, Shaoqu Xie, Yulei Zhang, Wenli Song, Xueqing QiuAbstract:© 2017 Society of Chemical Industry. BACKGROUND: More efficient downstream separation technologies need to be explored due to the low concentration of bio-based isobutanol in the fermentation broth. The Salting-Out extraction of isobutanol from its aqueous solution by employing nine salts (K 4 P 2 O 7 ·3H 2 O, K 2 HPO 4 ·3H 2 O, K 3 PO 4 ·3H 2 O, K 2 CO 3 , K 2 SO 4 , KCl, Na 2 CO 3 , Na 2 SO 4 , NaCl) as Salting-Out agents and three organic solvents (2-ethyl-1-hexanol, cyclopentanol, 2-methyl-2-butanol) as extractants were investigated at 298.15 K. RESULTS: The recovery was greatly influenced by the salt concentration and types of salts and organic solvents. When the initial molar K 4 P 2 O 7 concentration was equal to or higher than 1.01 mol kg -1 and the mass ratio of aqueous isobutanol solution to 2-ethyl-1-hexanol was 1:1, the recovery of isobutanol reached 100%, and more than 91.62% of water was removed from the organic phase. CONCLUSION: The Salting-Out effects of different anions in nine salts were ordered in the sequence: Cl - < SO 4 2- < HPO 4 2- < CO 3 2- < PO 4 3- < P 2 O 7 4- at the same initial molar salt concentration and using the same organic solvent. 2-Ethyl-1-hexanol was verified to be the most suitable extractant. The distribution behavior and Salting-Out extraction effects can be evaluated by tie-line correlations and solubility correlation.
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Salting-Out extraction systems of ethanol and water induced by high-solubility inorganic electrolytes
Journal of Industrial and Engineering Chemistry, 2017Co-Authors: Wenli Song, Conghua YiAbstract:Abstract The Salting-Out extraction systems of ethanol and water induced by the high-solubility inorganic electrolytes were investigated at 25 °C. More than 99.90% of ethanol was salted Out into the organic phase. The salt content of the organic phase is only abOut 0.01 wt%, which is negligible for the application of the ethanol–salt Salting-Out extraction. More than 90% of water can be retained in the aqueous phase. It is concluded that the Salting-Out effects of four Salting-Out agents on the aqueous solution of ethanol are ordered in the sequence: K4P2O7 > K3PO4 > K2HPO4 > K2CO3.
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Salting‐Out extraction of bio‐based isobutanol from an aqueous solution
Journal of Chemical Technology & Biotechnology, 2017Co-Authors: Conghua Yi, Yulei Zhang, Wenli SongAbstract:BACKGROUND More efficient downstream separation technologies need to be explored due to the low concentration of bio-based isobutanol in the fermentation broth. The Salting-Out extraction of isobutanol from its aqueous solution by employing nine salts (K4P2O7∙3H2O, K2HPO4∙3H2O, K3PO4∙3H2O, K2CO3, K2SO4, KCl, Na2CO3, Na2SO4, NaCl) as Salting-Out agents and three organic solvents (2-ethyl-1-hexanol, cyclopentanol, 2-methyl-2-butanol) as extractants were investigated at 298.15K. RESULTS The recovery was influenced by the salt concentration and types of salts and organic solvents greatly. When the initial molar K4P2O7 concentration was equal to or higher than 1.01 mol∙Kg-1 and the mass ratio of aqueous isobutanol solution and 2-ethyl-1-hexanol was 1:1, the recovery of isobutanol could reach 100%, and more than 91.62% of water was removed from the organic phase. CONCLUSION The Salting-Out effects of different anions in nine salts were ordered in the sequence: Cl- < SO42- < HPO42- < CO32- < PO43- < P2O74- at the same initial molar salt concentration and the same organic solvent. 2-Ethyl-1-hexanol was verified to be the most suitable extractant. The distribution behaviors and Salting-Out extraction effects can be evaluated by the tie-line correlations and solubility correlation.
