The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Phillipe Gérardin - One of the best experts on this subject based on the ideXlab platform.
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Tartaric Acid catalyzed furfurylation of beech wood
Wood Science and Technology, 2017Co-Authors: Prabu Satria Sejati, Aurélia Imbert, Christine Gérardin-charbonnier, Stéphane Dumarçay, Emmanuel Fredon, Eric Masson, Dodi Nandika, Trisna Priadi, Phillipe GérardinAbstract:European beech ( Fagus sylvatica L.) is a major tree species of European forest which is underexploited because of its low dimensional stability and durability. Similarly to what has been developed with radiata pine, furfurylation might be the answer to optimize the utilization of local beech wood. Beech wood furfurylation process was studied using five different catalysts: maleic anhydride, maleic Acid, citric Acid, itaconic Acid, and Tartaric Acid. Optimization of the furfurylation process was investigated for different catalyst and furfuryl alcohol (FA) contents, and different duration of polymerization. The following properties were studied: weight percent gain (WPG), leachability, anti-swelling efficiency (ASE), wettability, modulus of elasticity, modulus of rupture, Brinell hardness, and decay durability. Tartaric Acid, never investigated up to now, was retained as catalyst to perform furfurylation due to its efficacy compared to other catalysts and its novelty. Wood modification with FA and Tartaric Acid as catalyst led to samples with high WPG even after leaching, improved ASE, and lower wettability with water. Increasing the polymerization duration increased the fixation of FA in treated wood. Most of all, treatment gave a significant improvement in mechanical properties and resistance to wood decaying fungi.
Jacques Molinier - One of the best experts on this subject based on the ideXlab platform.
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Adsorption of Tartaric Acid and malic by active carbons
OENO One, 1995Co-Authors: L. Robert, J. Mourgues, Arlette Pamar-robert, Djilali Achour, Jacques MolinierAbstract:Adsorption of Tartaric Acid and malic Acid by active carbons bas been tested with six samples of carbons. At Acid pH ; the adsorbed amounts of Tartaric Acid and of malic Acid are practically the same. For a solution concentration of 20 g/l, adsorbed amounts from 0.008 to 0.29 gramme for one gramme of carbon have been found, variation which may be due to various states of carbon surface oxidation. Increasing the pH of the solutions shows a dramatic decrease of adsorbed amounts, this decrease being more rapid for Tartaric Acid than for malic Acid. At neutral pH, the adsoiption becomes negligible. With Acidic solutions containing the two Acids altogether, Acid malic is more adsorbed than Tartaric Acid.
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Equilibrium diagrams at 20.degree.C of water-Tartaric Acid-2-methyl-1-propanol, water-Tartaric Acid-1-pentanol, and water-Tartaric Acid-3-methyl-1-butanol ternary systems
Journal of Chemical & Engineering Data, 1991Co-Authors: Freddy J. Smagghe, Muhammad Faizal, Guy Malmary, Jacques MolinierAbstract:The purpose of this work is to study the Tartaric Acid recovering possibilities from wine distillery wastewater through a liquid-liquid extracting process. 2-Methyl-1-propanol, 1-pentanol, and 3-methyl-1-butanol may be suitable as extracting solvents. Water-Tartaric Acid-alcohol ternary system solubility diagrams and tie lines were established at the temperature of 20°C. Partition coefficients are comprised between 0.07 and 0.42. 1-Pentanol seems to be the best solvent to extract Tartaric Acid from regeneration of ion-exchanging resins
Lianxin Liu - One of the best experts on this subject based on the ideXlab platform.
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the hydration mechanism and performance of modified magnesium oxysulfate cement by Tartaric Acid
Construction and Building Materials, 2017Co-Authors: Wenhai Chen, Huifang Zhang, Wuyu Zhang, Ningshan Jiang, Lianxin LiuAbstract:Magnesium oxysulfate (MOS) cement has the advantages of light weight, low alkalinity, fire resistance, and good decorative value. Large-scale applications of MOS cement in civil engineering have been restricted by its low strength, which can be improved by adding some proper additives. Here, the effects of Tartaric Acid on the setting time, compressive strength, flexural strength, and deformation of MOS cement have been studied. Fourier transform infrared spectra, pH changes, hydration-heat release rate, and impedance have been observed to determine the effects of Tartaric Acid on the hydration process of MOS cement. To a certain extent, the addition of Tartaric Acid extends the setting time of MOS cement by improving the stability of the hydration film of active MgO in magnesium sulfate. X-ray diffraction, scanning electron microscopy, and mercury intrusion porosimetry were used to examine the hydration products and pore-size distribution of MOS cement. The analysis results indicate that the main reason for the high strength of MOS cement with Tartaric Acid is that the addition of Tartaric Acid can promote the formation of the needle-like high-strength phase of 5Mg(OH)2·MgSO4·7H2O and inhibit the formation and growth of the Mg(OH)2 crystal phase.
Prabu Satria Sejati - One of the best experts on this subject based on the ideXlab platform.
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Tartaric Acid catalyzed furfurylation of beech wood
Wood Science and Technology, 2017Co-Authors: Prabu Satria Sejati, Aurélia Imbert, Christine Gérardin-charbonnier, Stéphane Dumarçay, Emmanuel Fredon, Eric Masson, Dodi Nandika, Trisna Priadi, Phillipe GérardinAbstract:European beech ( Fagus sylvatica L.) is a major tree species of European forest which is underexploited because of its low dimensional stability and durability. Similarly to what has been developed with radiata pine, furfurylation might be the answer to optimize the utilization of local beech wood. Beech wood furfurylation process was studied using five different catalysts: maleic anhydride, maleic Acid, citric Acid, itaconic Acid, and Tartaric Acid. Optimization of the furfurylation process was investigated for different catalyst and furfuryl alcohol (FA) contents, and different duration of polymerization. The following properties were studied: weight percent gain (WPG), leachability, anti-swelling efficiency (ASE), wettability, modulus of elasticity, modulus of rupture, Brinell hardness, and decay durability. Tartaric Acid, never investigated up to now, was retained as catalyst to perform furfurylation due to its efficacy compared to other catalysts and its novelty. Wood modification with FA and Tartaric Acid as catalyst led to samples with high WPG even after leaching, improved ASE, and lower wettability with water. Increasing the polymerization duration increased the fixation of FA in treated wood. Most of all, treatment gave a significant improvement in mechanical properties and resistance to wood decaying fungi.
Jingang Yu - One of the best experts on this subject based on the ideXlab platform.
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enantioselective separation of tryptophan by mg al layered double hydroxides intercalated with Tartaric Acid derivative
Applied Clay Science, 2013Co-Authors: Feipeng Jiao, Hailei Song, Weijie Yang, Xinyu Jiang, Xiaoqing Chen, Jingang YuAbstract:Abstract A series of Tartaric Acid derivatives, such as di-p-toluoyl- L -Tartaric Acid ( L -DTTA), di-p-toluoyl- D -Tartaric Acid ( D -DTTA), dibenzoyl- L -Tartaric Acid ( L -DBTA) and dibenzoyl- D -Tartaric Acid ( D -DBTA), were intercalated into layered double hydroxides (LDHs) by the ion-exchange method in this paper. The supramolecular products, DTTA-LDHs and DBTA-LDHs characterized by XRD and FTIR, were explored to recognize tryptophan enantiomers according to the different opticity active of different Tartaric Acid derivatives in the interlayer of LDHs. Batch studies were carried out to address various experimental parameters such as contact time, pH, temperature and initial tryptophan concentration. The results show that levo compounds modified LDH trend to adsorb D -tryptophan, while L -tryptophan trend to be adsorbed by LDHs intercalated with dextrorotary compounds. The recognition process was confirmed to be a chemisorption process according to the kinetic studies. Separation of tryptophan from aqueous solution using DTTA-LDHs and DBTA-LDHs has been well described by pseudo-second-order kinetic model. The adsorption isotherms showed that the adsorption data fitted the Freundlich isotherm equations well. The thermodynamic parameters indicated that the adsorption process was a spontaneous and endothermic chemisorption process.
