The Experts below are selected from a list of 16134 Experts worldwide ranked by ideXlab platform
Luis A Rios - One of the best experts on this subject based on the ideXlab platform.
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maleinization of soybean oil Glycerides obtained from biodiesel derived crude glycerol
Journal of the American Oil Chemists' Society, 2013Co-Authors: David A Echeverri, William A Perez, Luis A RiosAbstract:Glycerides obtained from the glycerolysis of soybean oil with crude glycerol were acylated with maleic anhydride at 80–100 °C. Both uncatalyzed and catalyzed reactions with 2-methylimidazole (2-MI) were evaluated. Formation of maleated Glycerides was confirmed by 1H-NMR and FTIR analyses. Consumption of maleic anhydride as a function of time was followed by acid value titration. High conversion (ca. 95 %) of hydroxyl groups was obtained at 90 °C in 60 min without catalyst. Under these conditions, a product with 1.9 maleate moieties per glyceride molecule was obtained. Catalyzed reactions afforded lower conversions of hydroxyl groups and lower maleate yields compared to uncatalyzed reactions.
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synthesis of maleated castor oil Glycerides from biodiesel derived crude glycerol
Industrial Crops and Products, 2013Co-Authors: David A Echeverri, William A Perez, Luis A RiosAbstract:Abstract Castor oil Glycerides were obtained from the glycerolysis of castor oil or its methyl esters with alkaline-crude glycerol. High monoglyceride yields were obtained between 20–30 min and 180–200 C with both substrates. The glycerolysis of castor oil afforded highest yield of products at 180 C and 30 min (50.4 of monoGlycerides and 35% of diGlycerides). However, the glycerolysis of methyl esters was more selective toward the formation of monoGlycerides. Castor oil Glycerides were further esterified with maleic anhydride without catalyst. Reaction was followed by acid value and 1H NMR. ca. 87% conversion of hydroxyl groups was obtained at 90 C. The final product contained 2.6 maleate groups per glyceride molecule.
David A Echeverri - One of the best experts on this subject based on the ideXlab platform.
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maleinization of soybean oil Glycerides obtained from biodiesel derived crude glycerol
Journal of the American Oil Chemists' Society, 2013Co-Authors: David A Echeverri, William A Perez, Luis A RiosAbstract:Glycerides obtained from the glycerolysis of soybean oil with crude glycerol were acylated with maleic anhydride at 80–100 °C. Both uncatalyzed and catalyzed reactions with 2-methylimidazole (2-MI) were evaluated. Formation of maleated Glycerides was confirmed by 1H-NMR and FTIR analyses. Consumption of maleic anhydride as a function of time was followed by acid value titration. High conversion (ca. 95 %) of hydroxyl groups was obtained at 90 °C in 60 min without catalyst. Under these conditions, a product with 1.9 maleate moieties per glyceride molecule was obtained. Catalyzed reactions afforded lower conversions of hydroxyl groups and lower maleate yields compared to uncatalyzed reactions.
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synthesis of maleated castor oil Glycerides from biodiesel derived crude glycerol
Industrial Crops and Products, 2013Co-Authors: David A Echeverri, William A Perez, Luis A RiosAbstract:Abstract Castor oil Glycerides were obtained from the glycerolysis of castor oil or its methyl esters with alkaline-crude glycerol. High monoglyceride yields were obtained between 20–30 min and 180–200 C with both substrates. The glycerolysis of castor oil afforded highest yield of products at 180 C and 30 min (50.4 of monoGlycerides and 35% of diGlycerides). However, the glycerolysis of methyl esters was more selective toward the formation of monoGlycerides. Castor oil Glycerides were further esterified with maleic anhydride without catalyst. Reaction was followed by acid value and 1H NMR. ca. 87% conversion of hydroxyl groups was obtained at 90 C. The final product contained 2.6 maleate groups per glyceride molecule.
Salvatore Spagna Musso - One of the best experts on this subject based on the ideXlab platform.
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rapid determination of esterified glycerol and Glycerides in triglyceride fats and oils by means of periodate method after transesterification
Food Chemistry, 2007Co-Authors: Daniele Naviglio, Raffaele Romano, Fabiana Pizzolongo, Antonello Santini, Antonio De Vito, L Schiavo, G Nota, Salvatore Spagna MussoAbstract:Abstract This paper describes an accurate method to determine esterified glycerol in the Glycerides of edible fats and oils and, in general, in all triglyceride fat or oil. Esterified glycerol is released by means of a transesterification reaction with potassium hydroxide in methanol, which simultaneously produces fatty acid methyl esters. Free glycerol is oxidized selectively to formic acid and without any interference in the same environment in which the transesterification reaction occurs by the addition of periodate. The formic acid produced is then potentiometrically titrated using an acid–base reaction. By knowing the acidic composition and the distribution of the glycerol between triGlycerides, diGlycerides and monoGlycerides, the determination of glycerol also makes it possible to evaluate the content of Glycerides present in the fats. The most accurate glyceride determination was obtained by suitably combining the determination of bound glycerol and the distribution of fatty acids obtained by means of gas chromatographic analysis. With little modifications, the proposed method also makes it possible to successfully analyse edible fat in terms of glycerol content in aqueous containing matrixes.
William A Perez - One of the best experts on this subject based on the ideXlab platform.
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maleinization of soybean oil Glycerides obtained from biodiesel derived crude glycerol
Journal of the American Oil Chemists' Society, 2013Co-Authors: David A Echeverri, William A Perez, Luis A RiosAbstract:Glycerides obtained from the glycerolysis of soybean oil with crude glycerol were acylated with maleic anhydride at 80–100 °C. Both uncatalyzed and catalyzed reactions with 2-methylimidazole (2-MI) were evaluated. Formation of maleated Glycerides was confirmed by 1H-NMR and FTIR analyses. Consumption of maleic anhydride as a function of time was followed by acid value titration. High conversion (ca. 95 %) of hydroxyl groups was obtained at 90 °C in 60 min without catalyst. Under these conditions, a product with 1.9 maleate moieties per glyceride molecule was obtained. Catalyzed reactions afforded lower conversions of hydroxyl groups and lower maleate yields compared to uncatalyzed reactions.
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synthesis of maleated castor oil Glycerides from biodiesel derived crude glycerol
Industrial Crops and Products, 2013Co-Authors: David A Echeverri, William A Perez, Luis A RiosAbstract:Abstract Castor oil Glycerides were obtained from the glycerolysis of castor oil or its methyl esters with alkaline-crude glycerol. High monoglyceride yields were obtained between 20–30 min and 180–200 C with both substrates. The glycerolysis of castor oil afforded highest yield of products at 180 C and 30 min (50.4 of monoGlycerides and 35% of diGlycerides). However, the glycerolysis of methyl esters was more selective toward the formation of monoGlycerides. Castor oil Glycerides were further esterified with maleic anhydride without catalyst. Reaction was followed by acid value and 1H NMR. ca. 87% conversion of hydroxyl groups was obtained at 90 C. The final product contained 2.6 maleate groups per glyceride molecule.
Feng Chen - One of the best experts on this subject based on the ideXlab platform.
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Enzymatic ethanolysis subjected to Schizochytrium biomass: Sequential processing for DHA enrichment and biodiesel production
Energy Conversion and Management, 2019Co-Authors: Wang Xiaofei, Yu Zhang, Zheng Guo, Jiang Yue, Feng ChenAbstract:Abstract To valorize oleaginous Schizochytrium sp. biomass, a novel sequential process was addressed and developed to simultaneously produce high value DHA-enriched Glycerides and low value bulky biodiesels. In this process, Schizochytrium sp. biomass was first treated by alkaline protease; then the resulting biomass was directly subjected to enzymatic ethanolysis catalyzed by liquid enzymes from C. antarctica (CALA), T. lanuginosus (TL), R. miehei (RM) and A. oryzae (PLA). For all four liquid lipases, the alkaline protease treatment on Schizochytrium sp. biomass significantly enhanced total lipid recovery, biodiesel yield and yield of DHA-enriched Glycerides. Under optimized conditions, CALA and TL achieved the highest biodiesel yields 76.28–76.66 wt% based on microalgae TFAs while PLA had the lowest (55.25 wt%). Moreover, CALA attained the highest DHA (77.93 wt%) and LC PUFAs (93.08 wt%) contents in glyceride fraction, suggesting a superior performance to concentrate DHA and LC PUFAs in Glycerides. 13C NMR analysis illustrated that non-regiospecificity and unfavorability towards LC PUFAs of CALA made it possible to transesterify saturated fatty acids located in all 3 positions of microalgal oil; thus LC PUFAs were highly enriched in Glycerides. Overall, the sequential process using enzymes and ethanol as green media was successfully established for the co-production of high-value microalgal bioproducts rich in LC PUFAs and sustainable biodiesels in a comprehensive manner.