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1

Bankole, Kehinde Seun. "Uncatalyzed esterification of biomass-derived carboxylic acids." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/922.

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To shift from a petroleum-based to a biomass-based economy will require the development not only of biofuels, but also of biorenewable replacements for petroleum-derived chemicals. In this regard, environmentally friendly biomass-derived esters may serve as alternatives to fossil-derived chemicals such as toxic halogenated solvents and glycol ethers. Therefore, esterification of various carboxylic acids that find significant applications in the chemical, pharmaceutical, petrochemical, food, and cosmetic industries has been initiated by the chemical industry. At atmospheric condition, esterific
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2

Akbelen, Ozen Serap. "Kinetics Of Methyl Lactate Formation Over The Ion Exchange Resin Catalysts." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605027/index.pdf.

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iv The recovery of lactic acid from its dilute aqueous solutions is a major problem. The ester of lactic acid, namely, methyl lactate has a wide range of applications. The esterification of an aqueous solution of lactic acid with methanol is a reversible reaction. As excess of amount water is present in the reaction mixture, the conversion is greatly restricted by the chemical reaction equilibrium limitations. In this study the esterification kinetics of lactic acid with methanol both in the absence and presence of an ion exchange resin as a heterogeneous acid catalyst was investigated with is
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3

Vonner, Alexandre. "Étude et modélisation d'un procédé catalytique hétérogène d'estérification." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0175.

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Cette étude a pour objectif l'étude des processus impliqués dans la production de l'acrylate de 2-éthylhexyle, ester gras dérivé de l'acide acrylique. Cette réaction est accélérée par l'emploi d'un catalyseur solide, une résine acide sulfonée. Les interactions spécifiques des différents composés avec cette résine ont été étudiées à température ambiante. A 90°C, le couplage avec la cinétique de réaction a été analysé et modélisé en réacteur fermé. Un montage pilote spécifique conçu au laboratoire a permis la réalisation de réactions dans un réacteur en lit fixe, dont la structure tripartite per
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4

Oliveira, Samuel Alves de. "Avalia??o cin?tica e potencial do Nb2O5 obtido a partir de um complexo de ni?bio para forma??o do oleato de metila atrav?s da rea??o de esterifica??o do ?cido oleico." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15854.

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Made available in DSpace on 2014-12-17T15:01:35Z (GMT). No. of bitstreams: 1 SamuelAO_DISSERT.pdf: 6693517 bytes, checksum: 0be8bd399faaff3fe4e2da515c357889 (MD5) Previous issue date: 2014-01-30<br>Among the heterogeneous catalysts materials made from niobium show up as an alternative to meet the demand of catalysts for biodiesel production. This study aims to evaluate the potential of a heterogeneous catalyst derived from a complex of niobium in the reaction of methyl esterification of oleic acid. The catalyst was synthesized after calcination at different temperatures of a niobium complex
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5

Baco, Sindi. "Kinetic modeling for levulinic acid esterification in gamma-Valerolactone taking into account acid dissociation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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The first goal of this work is to demonstrate that using an aprotic polar solvent, such as γ- valerolactone instead of a protic polar solvent (i.e. ethanol, water), increases the yield of the esterification reaction of levulinic acid with ethanol, in presence of an acid catalyst. In fact, it is believed that an aprotic polar solvent can improve the catalytic activity of protons. The second goal is to study the influence of the variation of some parameters on the mentioned reaction. This was done by structuring the work in two sections: experimental and modelling. In the first section, two k
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6

Kadi, Mohamed El Amine. "Contribution à l'étude de l'influence des biocarburants et de leurs propriétés sur le fonctionnement des moteurs à combustion interne." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0207.

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Le réchauffement climatique, dû essentiellement aux gaz à effet de serre, et l’augmentation de la demande mondiale en énergies fossiles ainsi que leur épuisement rapide, représentent des défis environnementaux et économiques mondiaux,qui ont incité la communauté mondiale à se tourner vers les énergies alternatives et renouvelables. Cette thèse s’inscrit dans cette optique de développement des énergies renouvelables. Le travail de recherche peut se résumer en deux grands axes, où le premier englobe le développement du procédé de production de biodiesel en continu avec différentes matières premi
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7

Teo, Hue Tat Ronnie. "Recovery of dilute acetic acid through esterification in a reactive distillation column." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/24561.

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With ever-growing environmental concerns, petrochemical and fine chemical industries face an omnipresent issue in recovering acetic acid from its aqueous solutions. The recovery of acetic acid through the esterification process is a very viable option. However, esterification reactions are typically restricted by equilibrium limitations, and face challenges with product purification. Reactive distillation is an emerging technology that has an extremely attractive potential as a process alternative for carrying out equilibrium limited chemical reactions. Although the reactive distillation proce
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8

Leszczak, Jean-Pierre. "Synthèse d'esters de l'acide benzoïque par catalyse enzymatique en milieu hétérogène microaqueux." Grenoble INPG, 1998. https://theses.hal.science/tel-00841819.

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La synthèse d'esters de l'acide benzoïque par voie enzymatique en milieu hétérogène microaqueux est envisagée. Cette estérification est possible et est catalysée par la lipase de Candida rugosa en suspension dans un mélange hexane/toluène. Le toluène permet la solubilisation de l'acide benzoique. De nombreux paramètres influencent la synthèse des benzoates de méthyle et de butyle. La teneur en eau initiale agit uniquement sur la cinétique de réaction sans modifier de manière notable la position de l'équilibre de réaction. Il est préférable, dans la mesure du possible, de travailler à une activ
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9

Souza, Tatiane Fernandes Caetano. "Estudo comparativo de processos de produção de triacetina a partir da esterificação do glicerol." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-05092017-104546/.

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Foi realizado um estudo de desenvolvimento de projeto conceitual de uma unidade produtora de triacetina a partir de glicerol, como forma de aumentar a viabilidade de produção de biodiesel. A esterificação de glicerol com ácido acético envolve três reações de acetilação reversíveis consecutivas. Em cada etapa, água é produzida, resultando em conversão limitada e baixa seletividade. Uma forma de aumentar a seletividade da triacetina consiste em remover continuamente a água do meio reacional, de modo a alterar o equilíbrio. Foram considerados dois processos baseados em cinéticas diferentes. O pro
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10

Chaithanya, K. I. N. "Asymmetric synthesis of bioactive molecules via hydrolytic kinetic resolution of alkoxy epoxides, dihydroxylation of alkenes and synthetic methodologies involving oxidative cyclization of styrenes and esterification of aldehydes." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2014. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/1941.

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11

Costa, Diego Pinto. "Modelagem computacional aplicada na estimação de parâmetros cinéticos em processos químicos e cromatográficos." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=4853.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>A estimação de parâmetros cinéticos em processos químicos e cromatográficos utilizando técnicas numéricas assistidas por computadores tem conduzido para melhoria da eficiência e o favorecimento da compreensão das fenomenologias envolvidas nos mesmos. Na primeira parte deste trabalho será realizada a modelagem computacional do processo de produção de biodiesel via esterificação, sendo que, o método de otimização estocástica Random Restricted Window (R2W) será correlacionado com os dados experimentais da produção de biodiesel a p
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12

Zainal-Abidin-Murad, Sumaiya. "Production of biodiesel from used cooking oil (UCO) using ion exchange resins as catalysts." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10276.

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This study focuses on the development of novel two-stage esterification-transesterification synthesis of biodiesel from used cooking oil (UCO) using novel heterogeneous catalysts. The esterification of the UCO was investigated using three types of ion exchange resins catalysts including Purolite D5081, Purolite D5082 and Amberlyst 15. Of all the catalysts investigated, Purolite D5081 resin showed the best catalytic performance and was selected for further optimisation studies. From the optimisation study, it was found that the external and internal mass transfer resistance has negligible effec
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13

Patel, Dipesh. "Synthesis of n-hexyl acetate in batch and chromatographic reactors." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8521.

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Petrochemical and fine chemical industries face a daunting problem in recovering acetic acid from its aqueous solutions. The recovery of acetic acid could be done through esterification reaction. However, esterification is an equilibrium limited reaction. Multi-functional reactors such as chromatographic reactor (CR) and reactive distillation column (RDC) are promising technologies mainly for equilibrium limited reactions wherein reaction and separation of products are carried out in a single equipment that tends to shift the equilibrium towards the desired direction which is not possible in a
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14

David, Marie-Odile. "Déplacement d'une réaction équilibrée par pervaporation : études expérimentales, modélisation et mise au point de membranes catalytiques et séparatrices." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_DAVID_M_O.pdf.

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Le déplacement d'une réaction chimique équilibrée peut se faire grâce à l'assistance d'un procédé à membrane. Dans ce travail, l'extraction sélective et continue d'eau par pervaporation à travers une membrane composite GFT dont la couche active est en poly(vinylalcool) (PVA), permet d'obtenir une conversion totale de l'acide propionique et du n-propanol en ester. Dans un premier temps, un catalyseur homogène est utilisé pour accélérer la vitesse de réaction. Un modèle cinétique est alors bâti à partir des équations cinétiques d'estérification et de pervaporation. Grace à la validation de ce de
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15

Diemer, Étienne. "Intensification du procédé d’extraction, de purification et de fonctionnalisation des acides caféoylquiniques à partir de coproduits de la culture de l’endive." Electronic Thesis or Diss., Compiègne, 2024. http://www.theses.fr/2024COMP2821.

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La racine forcée d’endive est un coproduit de la culture de l’endive, produit caractéristique du Nord de la France, de la Belgique et des Pays-Bas. Actuellement sous utilisé en méthanisation ou en alimentation animale, ce coproduit contient pourtant des molécules d’intérêts à haute valeur ajoutée : les acides caféoylquiniques. Ces molécules possèdent des activités antioxydantes, anti-inflammatoires et permettent de limiter les maladies du désordre métabolique. Ce travail de thèse vise à intensifier le prétraitement, l’extraction, la purification et la fonctionnalisation des acides caféoylquini
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16

Dias, Marcio Andrade. "Modelagem cinética da esterificação de sec-butanol com ácido acético e estudo de monitoramento em linha da reação com espectroscopia de infravermelho." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-16112012-163258/.

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A esterificação do sec-butanol com ácido acético, submetida à catálise homogênea, apresenta poucos resultados experimentais de cinética reacional e equilíbrio químico disponíveis na literatura. A presente dissertação visa determinar os parâmetros cinéticos e de equilíbrio químico desta reação de esterificação, empregando modelo cinético de 2ª ordem baseado em atividades. Os experimentos cinéticos foram realizados em reator batelada com auxílio da metodologia Karl Fischer para análise do teor de água e determinação do perfil de frações molares ao longo da reação. A principal dificuldade na mode
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17

邱如吟. "Kinetics of heterogeneous esterification for production of butyl propionate." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/76023520659933253906.

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18

吳弦聰. "Kinetics of Heterogeneous Esterification for Producation of Amyl Acetate." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/23777358353032521047.

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碩士<br>國立臺灣科技大學<br>化學工程技術研究所<br>86<br>A fixed bed reactor was insrtalled in this work to study the kinetic behavior of heterogeneous esterification for production of amy 1 acetate by using Amberlyst 15and Dowex 50Wx8-100 (strongly acidic cation exchange resins) as catalysts. The effects of reaction temperature, average residence time, molar ratio of the reactants, and size of catalyst on the kimetic behavior were investigated. The experiments were conducted at temperatures from 30 °C to120 °C and molar ratio of reactants (amy1 alcoho1/acetic acid)from 15 to 1. The experimental results showed
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19

Liou, Bih-Yuan, and 劉璧媛. "Kinetics of Enantioselective Esterification of Naproxen by Lipase in Organic Solvents." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/45072939371164733522.

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碩士<br>國立成功大學<br>化學工程研究所<br>82<br>A kinetic model for the stereoselective esterification of racemic Naproxen with trimethylsilyl methanol by Candida cylindracea lipase (EC 3.1.1.3) in isooctane has been proposed . A ping-pong Bi Bi mechanism with competitive inhibition by this alcohol for each enantiomer has been found . The kinetic parameters were fitted from the time-course analysis,from which the theoretical results were calculated and found to be in agreememt with the experimental data.E
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20

Hsu, Hao-Lin, and 許豪麟. "Kinetics for Esterification of Sodium Benzoate over Immobilized Phase-Transfer Catalysts." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/88867029793730171032.

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碩士<br>國立中興大學<br>化學工程學系<br>91<br>The kinetics for SN2 nucleophilic substitution reaction of sodium benzoate with benzyl bromide catalyzed by immobilized phase-transfer catalyst was investigated. The support of solid phase-transfer catalyst was prepared from the copolymerization of polystyrene and chloromethylstyrene. Different functional groups were used as the active centers, such as trialkylamines, trioctylphosphine or triphenylphosphine, and that was immobilized onto the surface of the macroporous or microporous catalysts. In solid-liquid-liquid system, the product yield was obtai
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21

Yu, Kuo-Chi, and 于國琦. "Kinetics of Heterogeneous Esterification for Production of Amyl Acetate and Butyl Propionate." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/27450377843140660978.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>87<br>This study investigated the kinetic behavior of synthesizing amyl acetate and butyl propionate via heterogeneous esterifications over zeolite-Y and Dowex-50W, respectively. The experiments were conducted in a fixed-bed reactor at temperatures from 80℃ to 110℃ for amyl acetate system and from 60 ℃ to 120 ℃ for butyl propionate system with the molar ratios of alcohol to acid from 1:1 to 10:1 for both two esterifications. The rates of amyl acetate synthesis with zeolite-Y were found to be slower than those with Amberlyst-15. As evidenced from the exp
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22

Huang, Kuan-Chieh, and 黃冠捷. "Kinetics of non-catalytic esterification of phytosterol with oleic acid using microwave heating." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/17568127385733306032.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>105<br>Phytosterol ester can effectively reduce the levels of total cholesterols and decrease the risk of cardiovascular diseases. Although the enzyme-catalyzed esterification process is one of the most common methods for the synthesis of phytosterol esters, it remains many drawbacks, including high costs of enzymes, low product characteristic, and long reaction time. Microwave irradiation may become an alternative method for phytosterol ester synthesis since it generates a high esterification reaction rate. In this study, the effects of non-catalytic esterification
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23

Lin, Li-Jie, and 林立杰. "Kinetic Behavior Study on the Heterogeneous Esterification of." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ggd5js.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>106<br>The heterogeneous kinetics behavior was investigated with a batch reactor for the synthesis of linolenic acid n-butyl ester from linolenic acid and n-butanol over the cation-exchange resins, Amberlyat 39. The experiments were conducted at tempertures from 343.15 K to 363.15 K. Additionally, the effects of molar ratio of alcohol to acid in the feed stream, the mass transfer resistances on the catalytic reaction, and the different levels of catalyst loadings were also observed. Both reaction rate and equilibrium conversion of acid increased with increase of reac
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24

Chan, Kai-wen, and 詹凱雯. "Kinetic Behavior of Heterogeneous Esterification of Adipic Acid with Methanol." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/99762489980351731665.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>92<br>The kinetic behavior of heterogeneous esterification of adipic acid with methanol over an acidic cation-exchange resin, Amberlyst 35, was investigated with a fixed-bed reactor. The esterification was performed at temperatures between 313.15 K to 343.15 K and the molar ratios of feed (methanol to adipic acid) at 15 and 20 respectively. The reaction rate was found to increase with increasing temperature, but the equilibrium conversions of adipic acid were very close at different temperatures. It was also found that the equilibrium conversion of adipic acid inc
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25

TING, YSAI YU, and 蔡雨廷. "Kinetic Behavior of Heterogeneous Esterification of Glutaric Acid with Methanol." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/16859490921226985335.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>93<br>The kinetic behavior of heterogeneous esterification of glutaric acid with methanol over an acidic cation-exchange resin, Amberlyst 35, was investigated with a fixed-bed reactor. The esterification was performed at temperatures between 313.15 K to 333.15 K and the molar ratios of feed (methanol to adipic acid) at 15 and 20, respectively. The reaction rate was found to increase with increasing temperature, but the equilibrium conversions of glutaric acid were close over the entire range of experimental conditions. It means that the heat effect is minor and thus
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26

Schwarzer, Renier Bernhard. "Esterification of acetic acid with methanol : a kinetic study on Amberlyst 15." Diss., 2006. http://hdl.handle.net/2263/24670.

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Reaction rate data at 50oC was generated in a batch reactor over a wide range of initial concentrations in the reaction mixture. In each case the reaction was allowed to reach equilibrium. Equilibrium conversion data clearly indicated that it is important to consider the non-ideality of the system. The NRTL activity model proved to be the most suitable model to calculate the activity based equilibrium constant, as the percentage standard deviation of the equilibrium constant calculated in this manner was only 7.6% for all the different experiments as opposed to 17.8% when the equilibrium const
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27

Chang, Chu-Chun, and 張筑鈞. "KINETIC SIMULATION OF OLEIC ACID ESTERIFICATION WITH METHANOL BY SOLID ACID CATALYST." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3ttb5v.

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碩士<br>大同大學<br>化學工程學系(所)<br>107<br>Large amounts of waste cooking oils are generated daily from the restaurants and night markets in Taiwan. Without proper treatment, such waste cooking oil might become an environmental problem when dumped randomly. It may also cause a food safety problem if it is misused. Theoretically, the waste cooking oil containing triglyceride can be converted to biodiesel using the base catalyst. However, these low-quality feedstocks also containing significant amounts of free fatty acids (FFA) will react with the base catalyst to produce soap that hinders product sep
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28

Chen, Hsiao-Lou, та 陳筱簍. "Kinetic Behavior Study on the Heterogeneous Esterification of α-Linolenic Acid with Ethanol". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/2vd347.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>104<br>The heterogeneous kinetics behavior was investigated with a batch reactor for the synthesis of linolenic acid ethyl ester from linolenic acid and ethanol over cation-exchange resins, Amberlyat 39. The experiments were conducted at tempertures from 323.15 K to 343.15 K. Additionally, the effects of molar ratio of ethanol to acid in the feed stream, the mass transfer resistances on the catalytic reaction, and the different levels of catalyst loadings were also observed. The reaction rate and the equilibrium conversion of acid increased with increase of reaction
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29

Wu, Huai-En, and 吳懷恩. "Kinetic study On The Esterification of Benzenedicarboxylic acid and Substituted Phenylacetic acid By Solid-Liquid Phase-Transfer Catalysis." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/29246843380486099206.

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碩士<br>國立中興大學<br>化學系<br>87<br>英文摘要 The phase-transfer Catalysis (PTC) technique greatly enhances the reaction rates of various organic reations under mild conditions in multiphase systems. The objectives of the present study are to apply solid-liquid phase-transfer catalytic technique in systhesizing diesters and ether-esters by conducting nucleophilic substitutions in the organic solution, and to study the reaction kinetics. The systheses of dibenzyl phthalate (DBP)and diallyl phthalate (DAP) were conducted from potassium phthalate with benzyl bromide and allyl bromide ,respectively
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Рибалка, Артем Кирилович. "Кінетика реакцій естерифікації монохлорокарбонових кислот". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/1425.

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Рибалка А. К. Кінетика реакцій естерифікації монохлорокарбонових кислот : кваліфікаційна робота магістра спеціальності 102 "Хімія " / наук. керівник Т. В. Панасенко. Запоріжжя : ЗНУ, 2020. 58 с.<br>UA : В роботі 58 сторінок, 5 таблиць, 10 рисунків, було використано 55 літературних джерел, із них 39 іноземною мовою. Об’єкт дослідження – естери, похідні монохлороцтової кислоти, а саме бутил 2-хлороацетат. Предмет дослідження – газова хроматографія, ІЧ-спектроскопія, кінетика реакції естерифікації. Метою даної роботи є провести ресинтез естеру монохлороцтової кислоти та дослідити його фізик
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