Academic literature on the topic 'Acroléine – Synthèse (chimie)'
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Dissertations / Theses on the topic "Acroléine – Synthèse (chimie)":
Sotto, Nicolas. "Synthèse éco-compatible de DiVinylGlycol biosourcé." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2235.
Since few years, the priority for the different actors of the chemical fields has been the design of greener products and greener chemical processes to meet the environmental concerns. Thus, the twelve principles of the green chemistry were set. Among these concerns, the valorization of wastes and co-products from these processing is a real challenge. Indeed, the transformation of these co-products in high added value molecules can decrease the waste's amount from bio-mass. Among these different processes, our work focused on the chemical transformation of glycerol to DiVinylGlycol a high value-added molecule. To do this, our work is to find a sustainable process, in accordance with green chemistry. In that purpose, scientific, industrial and environmental locks have been studied
Béal, Patricia. "Utilisation de l'acroléine dans la synthèse de nouveaux composés odorants : étude de la réactivité de l'acroléine ou de diènes activés dans des réactions d'hétéro Diels-Alder avec des systèmes norbornéniques." Le Havre, 2001. http://www.theses.fr/2002LEHA0004.
The aims of this work was to prepare in two steps new compounds incorporating one or two acrolein moieties and then to study their olfactory properties. In the first past, we studied the structure and reactivity of trivertal 1. We prepared several esters from trivertal 1 either by conversion in aldehyde group or by Wittig reaction with phosphoranes leading to a,b-unsaturated esters. The synthesis of two aldehydes from trivertal 1 was also carried out. The Grignard reaction between trivertal 1 and acrolein leads to compound 19 allowing us to obtain three other derived products. In a last part, dehydration of trivertanol 2 was performed to produce the corresponding diene 24 wich was allowed to react with acrolein in a catalysed Diels-Adler reaction. All the prepared compounds have been submitted to an olfactory analysis. In the second part, we studied the hetero Diels-Alder reaction between acrlein and several substituted norbonenes. The results have shown that the compounds bearing an exocyclic double bond at the position a of the were not subjected to the Diels-Adler reaction and thus gave the desired products with moderate yields. The olfactory characteristics of all the obtained products were determined. In a last part, we looked for a valuable precursor or equivalents of acrolein. Our research followed two directions. The first one dealt with synthesis and reactivity of 1,3-dioxene 55 wich could be considered as an effective precursor of acrolein. The second one descrinbed the syntheses of several potential synthetic equivalents of acrolein bearing an electron withdrawing group at the position. The hetero Diels-Alder reactions of these compounds with ethylidene norbornene 35 was studied and the best result was obtained with the compound 63 bearing a CH2SO2Ph group. Among all the synthesised products, three of them have been selected by evaluation panel and their synthesis has been reproducted in a higher scale
Gahfif, Karima. "Analyse et quantification de la perte d'activité des catalyseurs lors de la fabrication d'additifs nutritionnels." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0240.
The methionine production process, Adisseo's flagship product, depends on the key step of acrolein synthesis via the catalytic oxidation of propylene in the gas phase. Observations at the industrial level underline an evolution of the catalyst (fouling, loss of activity) as well as hot spots, which ultimately harm the acrolein yield. For this purpose, a model describing the behavior of the industrial reactor over time is established to take into account this variation of the catalyst activity.In order to establish this model, it is necessary to go through a kinetic modeling step on a new catalyst. This one is carried out by exploiting data resulting from tests carried out on a microreactor and on an industrial pilot reactor, and has led to a model based on six consecutive and competitive reactions and involving the rate of oxidation of the catalyst. Furthermore, the experimental characterizations of new and spent catalyst samples have made it possible to identify the causes of deactivation, have shown a variable activity depending on the position of the sample in the reactor, and led to the establishment of a law deactivation which depends on time, position in the reactor and process parameters. Catalyst aging tests, under specific conditions, allowed the quantification of the physico-chemical parameters relating to this deactivation law.The integration of the kinetic model developed on a new catalyst and the variations in activity as a function of time and space finally enabled the development of a model describing the behavior of the industrial reactor for the oxidation of propylene to acrolein. The exploitation of this model finally allowed exploring ways of improving the operating parameters in order to extend the catalyst life
Yalgin, Hasret. "Vers la synthèse éco-compatible de dérivés de quinoléine biosourcés en flux continu." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2256.
The quinoline motif is present in numerous pharmaceutically relevant drugs as well as in a wide range of active ingredients used in cosmetic and food-processing industries. Despite its prevalence, typical quinoline synthesis reported in the literature are not scalable, and do not involve green protocols that take advantage of renewable resources. To address both limitations, we envisioned a green and industrially applicable approach using abundant resources. Specifically, we faced two main challenges: 1) to develop a sustainable synthesis of quinolines and 2) to apply this synthesis in a flow apparatus for potential industrial application. Throughout this dissertation, we disclose our studies toward the sustainable Skraup reaction. In particular, we developed a flow-synthesis of quinolines proceeding from glycerol - the main byproduct of biofuel production - as a building block and water as a green solvent. This innovative method marks a step toward the green production of heterocyclic compounds
Chateau, Mathieu. "Développement d’un réacteur intensifié pour la production d’acroléine." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0290.
The catalytic oxidation of propylene to acrolein is a complex and highly exothermic process carried out in the gas phase, involving consecutive and competitive reactions. To maximize the efficiency of this process, the temperature needs to be rigorously controlled and the thermal transfers must be maximized, in order to evacuate the heat released by the reactions. A millistructured reactor-exchanger has thus been chosen to intensify this process. Indeed, millimetric channels washcoated with an industrial catalyst provide intensified heat and mass transfer. To carry out this design, a preliminary study of the kinetics of these reactions was carried out and a kinetic model was determined. This model was then used to identify the optimal operating conditions of a single reactive channel (temperature, number of channels, composition), and to extrapolate these conditions for the design of an intensified reactor exchanger. The shape of the distribution and collect chambers of these reactive channels were then optimized to minimize maldistribution, maximize the acrolein yield with an optimal control of the temperature, and to ensure the safety of the process. This intensified reactor-exchanger with complex geometry was finally manufactured by 3D printing, within the French project FAIR (Additive Manufacturing for the Intensification of Reactors)
Ghribi, Abdellaziz. "Utilisation des organocuivreux, associés ou non à un acide de lewis, en synthèse asymétrique et dans la préparation des beta-cétophosphonates." Nancy 1, 1986. http://www.theses.fr/1986NAN10059.