Tesis sobre el tema "Synthèse des procédés"
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Gibon-Fargeot, Anne-Marie. "Synthèse d'observateurs pour le génie de procédés". Lyon 1, 1995. http://www.theses.fr/1995LYO10309.
Texto completoFortuny, Heredia Montserrat. "Modélisation de procédés pour la synthèse de latex multipopulés". Lyon 1, 2002. http://www.theses.fr/2002LYO10174.
Texto completoPennec, Alizé. "Procédés biotechnologiques éco-compatibles pour la synthèse de furanoconjugués". Rennes, Ecole nationale supérieure de chimie, 2012. http://www.theses.fr/2012ENCR0007.
Texto completoChemo-enzymatic synthesis as an efficient and environmental friendly strategy to access furanosidic compounds. Alpha-L-arabinofuranosidase from Clostridium thermocellum (Araf51), a thermostable glycosidase, is able to use arabinofuranosyl-donors to catalyse transglycosylation reactions with various aliphatic alcohols to give the corresponding glycoconjugates. Thanks to random mutagenesis method involving the development of an efficient screening, five mutants were obtained. In comparison to the wild type enzyme, they improve the reaction time, the conversion rate and the specificity to the alkyl furanoside formation. Many efforts have focused on the extraction and conversion of renewable biomass as biofuels or biocompounds but have neglected the pentose polymers from hemicellulose which represent 30 % of the total biomass. Hydrolysis of sustainable polymers as arabinan or arabinoxylan by the araf51 was studied. To enhance the hydrolysis rate, mutants were selected by a screening based on the conditions of the transglycosylation reaction performed to produce methyl-alpha-L-arabinofuranoside by the Araf51. We also demonstrate that a cyclodextrin glycosyltransferase, CGTase from Thermoanaerobacterium sp. Was able to recognize and glucosylate alkyl and para-nitrophenyl furanosides using beta-cyclodextrin as substrate with efficiency. The compounds were identified and presented only one interesting regioisomery. These compounds are good targets as amphiphilic molecules, building block or immunostimulating and anti-parasitic drug
Gonnot, Vanessa. "Synthèse de molécules d'intérêts thérapeutique: Rhéine et Méquitazine : Mise au point de procédés de synthèse". Strasbourg 1, 2007. http://www.theses.fr/2007STR13241.
Texto completoThis Ph-D work in collaboration with Laboratoires Pierre Fabre has lead to the developpment of new synthetic routes to biologically active coumpounds. In chapter 1, we have synthetised Mequitazine by a new route. Key step is a palladium-catalysed allylic substitution on a new allylic substrate. Racemic Mequitazine is obtained by hydrogenation in the last step, but this route could lead to biologically active Mequitazine enantiomer by the mean of an asymmetric hydrogenation catalyst. Two new ways for the synthesis of Rhein has been developped in chapter 2. They are both based on ortho-metallation reaction. The first route has been optimised so that it can be used industrially, while the second one, by changing the electrophile, leads to Rhein in only three steps. Last step’s Friedel Crafts’acylation selectivity has been improved by detailed study of Hayashi rearrangement in molten salt. In a third chapter, a new method for converting -fluorocyanhydrines into aldehydes has been studied
Mendez, Azua Hector. "Synthèse de lois de surveillance pour les procédés industriels complexes". Phd thesis, Grenoble INPG, 2002. http://tel.archives-ouvertes.fr/tel-00198339.
Texto completoGati, Wafa. "Nouveaux procédés de synthèse d’hétérocycles azotés par carbométallation intramoléculaire d’ynamides". Versailles-St Quentin en Yvelines, 2013. http://www.theses.fr/2013VERS0055.
Texto completoThe research projects that I have been involved during my PhD are all focused on the development of new processes for the synthesis of nitrogen heterocycles based on a unified approach relying on the use of intramolecular carbometallation reactions from ynamides. These unique molecules, whose chemistry has been under intense investigation during the last decade, notably for the inclusion of nitrogen-based functional groups into organic molecules, are emerging as useful and versatile building blocks in organic synthesis. Capitalizing on their unique reactivity, we have been able to design new processes in heterocyclic chemistry based on various carbometallation reactions starting from conveniently substituted ynamides. Indeed, we developed new routes to dihydropyridines, pyridines and indoles by intramolecular carbolithiation or carbocupration of ynamides. These new reactions allow for a straightforward and original entry to these various heterocyclic systems, which could be highlighted by a formal synthesis of a bioactive compound: Sarizotan. All together, this work should contribute to further expand the synthetic utility of ynamides as well as intramolecular carbometallation reactions in organic synthesis
Oudeyer, Sylvain. "Nouveaux procédés d'électrosynthèse et de synthèse de cyclopropanes, d'époxydes et d'aziridines". Paris 12, 2003. https://athena.u-pec.fr/primo-explore/search?query=any,exact,990003949000204611&vid=upec.
Texto completoThe aim of this work is to develop new synthetic methods for preparation of reactive nucleophilic species by activation of polyhalomethyl compounds. The latter species would react with various electrophilic compounds to produce small rings. An electrochemical process involving an iron/copper complex catalytic system and a simple Barbier reaction involving magnesium in DMF were used to prepare cyclopropanes, oxiranes and aziridines from respectively alpha, beta-unsaturated ketones or esters, nonconjugated aldehydes or ketones, and imines. These two simple and complementaiy new processes provide good yields in small rings, and moreover, they must be regarded as interesting alternatives to most common syntheses which use pollutant compounds or require very complex procedures. The 2-acyl-1,1-diphenylcyclopropanes thus obtained lead, through acid-catalysed ring-opening, to either substituted naphtalenes or beta-benzhydryl-alpha, beta-cycloalkenones
Théry, Hétreux Raphaële. "Analyse de faisabilité, synthèse et conception de procédés de distillation réactive". Toulouse, INPT, 2002. http://www.theses.fr/2002INPT023G.
Texto completoHallou-Beddiar, Zoulikha. "Procédé discontinu appliqué à la synthèse des éthers couronnés". Compiègne, 1991. http://www.theses.fr/1991COMPD380.
Texto completoGissot, Arnaud. "Vers de nouveaux procédés en synthèse organique : Réinvestigation de quelques réactions anciennes". Université Louis Pasteur (Strasbourg) (1971-2008), 2002. https://publication-theses.unistra.fr/public/theses_doctorat/2002/GISSOT_Arnaud_2002.pdf.
Texto completoThis manuscript describes several works that take profit of classical organic transformations to develop novel synthetic methodologies. The strategies developed are environmentally friendly and economically relevant. In the first part, we made use of an alkylsodium base in situ generated from chlorooctane and sodium in the ortho- or a-metalation of (hetero)aromatic compounds. The reagents needed are stable, cheap and the conditions used are especially well adapted to an industrial usage. Combination of the aromatic substrate affinity for Na+ associated to proton abstraction kinetics allowed us to propose an original mechanism that fully explains our experimental results. In the second part, we tried to synthesize catechin, a natural flavonoid frequently encountered in the plant kingdom. Our strategy was devised as far as possible in aqueous solvents as free polyphenolic compounds are water soluble, and was focused on phloroglucinol alkylation with different alkylhalides. In each case, excellent mono-C-alkylation selectivity was obtained. Finally, we developed an alternative strategy to transform secondary nitro compounds into ketones by means of nitrosating species auto-catalytically generated under neutral conditions from NaNO2. In annex, we also report our attempts to fabricate a photonic band-gap material from functionalized silica nano-beads
Fournier, Antoine. "Développement de procédés écoresponsables pour la synthèse de solvants et d'organocatalyseurs biosourcés". Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCK046/document.
Texto completoOxazolidinones are promising compounds for industrial applications, but nowadays there is not convenient method to produce them on large scale, because of the use of reactants and metallic catalysts harmful for health and environment. A new synthesis method of these compounds was thus elaborated using aminoalcohols and diethyl carbonate. This reaction is catalysed by a biobased imidazolium hydrogen carbonate which is produced by an electrochemical pathway in order to reduce its impact on the environment.This oxazolidinones synthesis method was then applied to the synthesis of a biobased oxazolidinone. To achieve this, an aminoalcohol synthesis was realised, and its structure was established from reactants that can come from renewable resources. The synthesis pathway was the object of modifications to permit the production of the aminoalcohol on a larger scale in safer conditions.The second thematic of these works is based on ionic liquids, very low volatile liquid salts, commonly used as solvents. These compounds are usually expensive, so, rather than to eliminate them at the end of their use, it is more interesting to recycle them. But their low volatility prevents their recycling by distillation, unlike common organic solvents. So, a first electrochemical method was developed, low energy consuming, permitting the recycling of biobased ionic liquids by the formation of an imidazolium hydrogen carbonate as intermediate. This method was compared with other recycling processes through a preliminary life cycle study.Keywords: oxazolidinone, aminoalcohol, imidazolium, ionic liquid, biobased, recycling, electrochemistry, sustainable development, eco-design, life cycle
Angeli, Jean-Marc. "Formulations et procédés de nettoyage et d'entretien à faible incidence sur l'environnement". Aix-Marseille 3, 1993. http://www.theses.fr/1993AIX30022.
Texto completoLecomte, Morgan. "Développement de nouveaux procédés de synthèse basés sur la chimie des ions cétèniminium". Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/261588.
Texto completoDoctorat en Sciences
info:eu-repo/semantics/nonPublished
Fakhfakh, Nadim. "Recherche de conditions opératoires optimales pour des procédés de synthèse en chimie fine". Toulouse, INPT, 2004. http://www.theses.fr/2004INPT013G.
Texto completoThilmany, Pierre. "Développement de nouveaux procédés de synthèse basés sur la chimie cationique des ynamides". Doctoral thesis, Universite Libre de Bruxelles, 2021. https://dipot.ulb.ac.be/dspace/bitstream/2013/324082/4/These.pdf.
Texto completoDoctorat en Sciences
info:eu-repo/semantics/nonPublished
Kolmykov, Oleksii. "Synthèse en milieu aqueux de nanocristaux de semi-conducteurs via des procédés microfluidiques". Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0090/document.
Texto completoIn recent years, microfluidics has become an attractive technology for the continuous flow synthesis of colloidal nanocrystals. This technology allows a good control of the synthesis parameters, a good reproducibility and the possibility of the application on a large scale. In a first part, we have developed continuous and ecological syntheses of the ZIF-8 crystals for the large scale, either with a monophasic or a biphasic flow (water/alkane). The microfluidic technology allows the fast synthesis (10 min) of ZIF-8 crystals over a wide size range (from ca. 300 to 900 nm) simply by varying the experimental parameters (flow rates, temperature,…). ZIF-8 crystals with the stable rhombic dodecahedron shape, of sodalite structure and with a high specific surface area (ca. 1700 m2.g-1) were obtained. Next, the catalytic properties of ZIF-8 crystals were evaluated. These particles were demonstrated to be an efficient heterogeneous catalyst for the Knoevenagel synthesis of α,β-unsaturated cyanoesters and of 3-cyanocoumarins using 2-hydroxy aromatic aldehydes and ethyl cyanoacetate as starting materials (yields ranging from 89 to 95%). The ZIF-8 particles can be recycled at least five times with negligible changes in catalytic performances. In the second part, we synthesized the Mn2+ or Cu+-doped CdS QDs coated with a ZnS shell in a tubular microreactor using a monophasic or a biphasic flow (water/alkane). Various experimental parameters (time, temperature, pH, molar ratio, concentration and nature of the starting materials) were evaluated to optimize the optical properties of the dots. The obtained Mn2+ doped CdS QDs exhibited a photoluminescence emission related to the 4T1 → 6A1 transition with quantum yields higher than 10%. The introduction of a ZnS shell with the monophasic flow allows to improve the optical properties and to reduce the surface defects of the 6% Mn:CdS/ZnS QDs (strong emission at 590 nm and quantum yields of ca. 20%). The introduction of a ZnS shell on the surface of Cu doped CdS QDs does not significantly improve the quantum yields. Finally, the synthesis of Mn2+-doped ZnS QDs with monophasic or biphasic flow (water/alkane) was developed. The dots have a photoluminescence quantum yield of 13% if they are prepared in a monophasic water flow
Larochette, Mathieu. "Mousses de polymères : étude des procédés de synthèse et de mise en forme". Pau, 2007. http://www.theses.fr/2007PAUU3016.
Texto completoPolymer foams are used for many applications thanks to their properties: lightness, insulation, impact resistance. . . In this work, we studied the elaboration of two kind of materials: polyurethane foam and extruded polystyrene foam. In the case of polyurethane, the correlation between the kinetic of polymerization and the foaming is important. For the polystyrene, we shown that the residence time distribution theory modelize properly the extrusion process. We found a relationship between the structural anisotropy and the thermal anisotropy coupling an experimental and a numerical approaches. The morphological anisotropy observed on industrial foam does not permit to observe the anisotropy of temperature field
Cadinot, Mélanie. "Nouveaux procédés d'élaboration de polymères à empreintes moléculaires". Phd thesis, INSA de Rouen, 2008. http://tel.archives-ouvertes.fr/tel-00558785.
Texto completoDe, Robillard Guillaume. "Synthèse et réactivité chimiques et électrochimiques de dérivés d'imidazoliums : vers des procédés éco-responsables". Thesis, Dijon, 2015. http://www.theses.fr/2015DIJOS026/document.
Texto completoThis work deals with the use of electrochemistry as a tool for alternative synthesis of new azolium-based molecules.A new electrosynthesis method was developed for the synthesis of imidazolium carboxylates (masked carbenes) leading to a wide library of compounds. This approach was compared to already reported chemical syntheses. In the current context of sustainable development, bio based products have been synthesized and optimization of the process was achieved in order to reduce waste and energy consumption.The key role of the hydrogenoxalate anion was demonstrated in the synthesis of ionic liquids and/or imidazolium salts. Some of them were employed as recyclable catalysts for Fischer esterification.The direct electrochemical reduction of various azoliums was also studied. The coupling of two electrogenerated neutral radicals leads to the corresponding σ-dimers. The oxidation of this species gives back the starting azolium proving the “reversibility” of the reaction, paving the way for new molecular switches.Azolium containing pyrene moiety was also electrosynthesized. Thus, electrochemical oxidation of pyrene in presence of different nitrogen nucleophiles leads to azolium pyrenes. This process was optimized in order to reduce waste and simplify the experimental setup. Some products have shown antimicrobial activities
Apanga, Ludovic. "Mise au point de procédés de préparation d'oligosaccharides contenant du fucose à partir d'exopolysaccharides issus de souches mutées de bactéries du sol". Amiens, 2008. http://www.theses.fr/2008AMIE0116.
Texto completoL-fucose and oligosaccharides containing of L-fucose present interesting biological properties notably in the prevention of the metastases, in the reaction of inflammation, in the treatment of rheumatoid arthritics, in the vaccination (antigens) and in the cosmetic domain against the dehydration of the skin. A production of L-fucose as of oligosaccharides containing of L-fucose with the aim of their use in therapies, pushed numerous laboratories to a screening of organisms synthetizing polysaccharides containing of L-fucose. Our work, concerned first of all the production of the polysaccharides by Sinorhizobium M5N1 cPRK290 noted N and Enterobacter noted Sc strains, later these polysaccharides were characterized. And secondly we produced oligosaccharides containing of L-fucose from polysaccharides. This production of oligosaccharides required the use of several methods (acid hydrolysis, thermal hydrolysis, in the medium of culture and enzymatic degradation). The enzymatic method allows to obtain oligosaccharides in a reproducible way
Zhou, Xinxin. "Procédé de synthèse, propriétés et applications d'élastomères techniques à base d‘itaconates". Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0006.
Texto completoThis thesis deals with the preparation and application of itaconate based engineering elastomers and their nanocomposites. The following elastomers or nanocomposites were prepared: (1) nanocomposites based on 3,9-bis[1,1-dim ethyl-2-{b-(3-tertbutyl-4-hydroxy-5-methylphenyl)propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro-[5,5]-undecane (AO-80) and poly(diisoamyl itaconate-co-isoprene) (PDII), (2) a bio-based carboxylic elastomer, poly(dibutyl itaconate-co-isoprene-co-methacrylic acid) (PDIM), and nanocomposites based on it and silica or halloysite nanotubes, (3) a novel bio-based elastomer, poly(dibutyl itaconate-co-butadiene) (PDIB), and nanocomposites based on it and silica. Bio-based green tires were manufactured by using PDIB/silica nanocomposite in a tire tread formulation. In addition to the preparation of the above bio-based elastomers and their nanocomposites, this thesis also gives a review on the progresses on bio-inspired sacrificial bonds in polymeric materials. This review will serve as a guide to engineer sacrificial bonds into itaconate based elastomers with high strength and toughness
Capelle, Nicolas. "Procédés de synthèses de dérivés hétérocycliques de la phénanthridine utilisés en santé animale". Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30067.
Texto completoWe studied the multistep synthetic process of two phenanthridine derivatives, namely the trypanosomicides Homidium and Isometamidium used in animal health, with the purpose to acquire the chemical and analytical knowledge on all the process. A step of quaternisation of phenanthridine, which was hazardous under previous conditions, was improved with an increase of the yield under safe regulation of the reaction. The last step of synthesis was controlled and optimized especially thanks to an experimental design. For avoiding a long and tedious separation procedure of salting out, we developed a novel and original process of purification of Isometamidium by nanofiltration, which is a process of filtration on membrane that could be extended to fine chemicals. Finally we designed and carried out a new synthetic route to phenanthridinium salts, what avoids the step of quaternisation of phenanthridine. The strategic step of this synthesis used the Suzuki's coupling reaction
Huchede, Maxime. "Développement de procédés originaux et compétitifs de synthèse de méthionine, à partir de nouvelles matières premières". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1288.
Texto completoChiva, Valérie. "Conception, synthèse et formulation de nouveaux produits cosmétiques. Application aux vernis à ongles". Aix-Marseille 3, 1994. http://www.theses.fr/1994AIX30111.
Texto completoRaad, Ibrahim. "Contribution à la définition d'une méthodologie d'analyse et de synthèse d'un processus industriel". Mulhouse, 1987. http://www.theses.fr/1987MULH0076.
Texto completoDewez, Damien. "Applications de la Catalyse au Cuivre en Synthèse Totale et pour le Développement de Nouveaux Procédés Impliquant des Cyanamides". Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/315175.
Texto completoDoctorat en Sciences
info:eu-repo/semantics/nonPublished
Wolbert, Dominique. "Analyse de sensibilité et optimisation dans un simulateur de procédés modulaire simultané". Toulouse, INPT, 1992. http://www.theses.fr/1992INPT072G.
Texto completoSene, Mame Birame. "Chimie des agroressources : nouveaux procédés de synthèse de l'acide 2,5-furane dicarboxylique à partir de l'acide mucique". Toulouse, INPT, 1994. http://www.theses.fr/1994INPT058G.
Texto completoTchuenkam, Tchoneng Honoré. "Techniques formelles pour le développement de systèmes de conduite de procédés manufacturiers : abstraction, spécification, synthèse et optimisation". Nancy 1, 1991. http://www.theses.fr/1991NAN10413.
Texto completoLancien, Antoine. "Synthèse d’amines bio-sourcées à l’aide de procédés hybrides combinant des nanoparticules métalliques supportées et des transaminases". Thesis, Université de Lille (2018-2021), 2021. https://pepite-depot.univ-lille.fr/ToutIDP/EDSMRE/2021/2021LILUR059.pdf.
Texto completoThe objective of hybrid catalysis is to exploit the advantages of biological and chemical catalysts to access new synthetic routes that cannot be performed independently or to perform transformations that have shown low yields with conventional approaches. 5-Hydroxymethylfurfural (HMF) is a versatile platform (or building block) molecule that can be used in many industrial applications. In particular, the synthesis of biosourced amino polymers represents a promising method for its valorization. To date, very few studies have described the production of these amino derivatives and their polymers. Finding an efficient methodology to directly convert HMF to 5-aminomethyl-2-furancarboxylic acid (AMFC) is therefore a significant challenge. After selecting the best oxidation catalyst for the conversion of HMF to 5-aldehyde-2-furancarboxylic acid and immobilizing a transaminase on a solid support, we were able to implement the first "one-pot two-step" hybrid catalytic process to produce FMCA (77% yield). With 2,5-furandicarboxylic acid (FDCA, 23% yield) as the sole by-product, this represents the most efficient direct catalytic production method of FMCA from HMF reported to date. In addition, a hybrid "one-pot one-step" process for integrated production of FMCA from HMF was also developed with a maximum yield of 20%, this represents a first breakthrough for this platform molecule, and a first achievement for French hybrid catalysis. Finally, the synthesis of a hybrid multi-catalytic material combining palladium nanoparticles and a transaminase, on an EziGTMOPAL support, was achieved and its application led to a final yield of 10% in FMCA. Finally, this concept was also applied to the conversion of a panel of bio-sourced molecules, with in particular the transformation of myrtenol into its amino equivalent according to a "one-pot two-step" process with a yield higher than 99%
Dobrosavljevic, Ivana. "Intensification des procédés de synthèse des produits de contraste et application à leur fabrication industrielle en continu". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0022.
Texto completoPreventing diagnostics are increasing and so is the demand for contrast media while its industrial cost needs to be decreased for competitiveness reasons. The synthesis route for a contrast media used in X-ray medical imaging, an iodinated molecule with hydrophilic functional groups, is made of several reactions: some of them are limited by heat transfer (exothermic reactions) or/and mass transfer (multiple-phase media) while others are kinetically limited. The use of continuous intensified equipment leads to enhanced heat and mass transfer performances while keeping good selectivity and reproducibility. The synthesis route is globally modified in the first place in order to shift from batch to continuous intensified and the reactions are classified for local intensification studies. A combined approach based on experimental measurements and simulation enables the building of reaction models which can be used as a guideline for the experiments towards finding the operating conditions that lead to the desired performances at laboratory scale. The new synthesis route production is based on an alternation between continuous and discontinuous steps, which leads to difficult production management. New prospects are created with a new hydrophilic synthesis route, where the limitations for shifting from batch to continuous due to the presence of solids are solved and the whole synthesis route can be transferred from batch to continuous mode
Bouts, Nicolas. "Synthèse, caractérisation, et propriétés de couches minces nanocomposites nickel/carbone et cuivre/carbone déposées par procédés plasmas". Nantes, 2014. https://archive.bu.univ-nantes.fr/pollux/show/show?id=eb3adf1f-744e-4804-b413-fa80c472e4d1.
Texto completoNanocomposite metal/carbon thin films, consisting of metal rich nanoparticles embedded in an amorphous carbon matrix, present specific and tunable physicochemical properties, depending on the chemical composition of thin films. The morphology and the microstructure of these materials have been explored on a wide range of chemical composition using electronic microscopy, EDX, XPS, XRD, and Raman spectroscopy. The influence of the metal nature on the nanocomposite metal/carbon thin film microstructure and electrical properties was studied for two metals : nickel and copper. The thin films were deposited using two different plasma processes : a first one combining the magnetron sputtering of the metal target (nickel or copper) and the plasma enhanced chemical vapour deposition in an argon/methane gas mixture, and the other one consisting in the cosputtering of metal and graphite targets. The study of the electrical properties highlighted an electrical percolation phenomenon. The catalytic properties for the carbon nanotubes growth and the piezoresistive behavior of nickel based thin films were studies. In addition, an original method based on the selective etching of copper nanoparticles contained in nc-Cu/C thin films was developed, leading to the synthesis of nanoporous carbon electrodes
Castries, Augustin de. "Synthèse de dérivés du cyclam et applications de leurs complexes métalliques dans des procédés catalytiques de chimie verte". Versailles-St Quentin en Yvelines, 2007. http://www.theses.fr/2007VERS0013.
Texto completoThis work has been devoted to the synthesis of various macrocycles derived from cyclam bearing sulfinyl and sulfonyl pendant arms and to the study of their potential applications in catalysis. The first part describes the synthesis of perfluorinated macrocycles by Michael addition on various perfluorinated acceptors. The catalytic activity of the corresponding complexes has been studied in autoxidation under fluorous biphasic conditions. The second part describes the synthesis of macrocycles from arylvinylsulfoxides and sulfones. The auxiliary role of the sulfinyl and sulfonyl moieties in the complexation of metallic cations Cu2+ and Eu3+ has been studied. The catalytic activity of the Cu (II) complexes and their ligands has been evaluated in catalytic reactions of Michael additions and ring opening of epoxides in aqueous and organic medium. The third part is devoted to the development of solid phase synthesis for the preparation of trifunctionnalized cyclams
LABAT, GILLES. "Modélisation d'hémoprotéines, cytochrome P-450, chloroperoxydase et lignine peroxydase : modèles efficaces de la lignine peroxydase et développement de procédés d'oxydation par catalyse biomimétique". Toulouse 3, 1989. http://www.theses.fr/1989TOU30175.
Texto completoArmanet, Frédéric. "Synthèse d'observateurs pour les systèmes non linéaires : application à la détection automatique de pannes en génie des procédés". Lyon 1, 1999. http://www.theses.fr/1999LYO10110.
Texto completoRiquet, Guillaume. "Synthèse et frittage par des procédés non conventionnels de composés diélectriques dérivés de la pérovskite de type CaCu3Ti4O12". Thesis, Normandie, 2019. http://www.theses.fr/2019NORMC257.
Texto completoAs the miniaturization of electronic components is becoming a major issue in many business sectors (automotive, aerospace, computer sciences…), the development of new families of materials with a high dielectric constant and low dielectric losses is still a priority line of research. This is the case of CaCu3Ti4O12. This material has been studied extensively since 2000 thanks to its “exceptional” relative permittivity. The work presented in this thesis proposes an original study of the synthesis and sintering of CaCu3Ti4O12 by non-conventional processes and its structural, microstructural and physical characterization.The first study concerns the conventional and microwave synthesis of CaCu3Ti4O12. The interest of microwave heating is the good coupling between microwaves and the dielectric properties of the material. This allows a rapid synthesis of CaCu3Ti4O12 and the control of its particle size. Subsequently, the study focused on a thorough analysis of the natural sintering of this ceramic. Densification is controlled up to 80% of relative density by grain-boundary diffusion. At higher temperature, a liquid phase occurs during the sintering, resulting in abnormal grain growth. Various sintering techniques (controlled atmosphere, SPS, forging) were used to control the microstructure of CaCu3Ti4O12. In the meantime, particular attention was paid to the nanostructural characterization of grain boundaries. For the first time, the transmission electron microscopy analysis reveals the exact nature of the copper-rich phases segregating at the grain boundaries in CaCu3Ti4O12. Finally, the structural, microstructural and physical characterizations of all the polycrystalline ceramics and the single-crystal provide new arguments in the understanding of the dielectric properties of CaCu3Ti4O12
Saillard, Raphaëlle. "Phénomènes thermiques sous champ micro-ondes dans les procédés de synthèse organique : application à la réaction de Diels-Alder". Toulouse, INPT, 1995. http://www.theses.fr/1995INPT046G.
Texto completoBarale, Sébastien. "Étude des procédés de synthèse et des modes d’action de produits pétroliers tels que les lubrifiants et les graisses". Thesis, Nice, 2015. http://www.theses.fr/2015NICE4075.
Texto completoThe research work presented in this thesis are oriented on the understanding of reactional mechanisms occurring in the field of oil products, such as lubricants and greases, by thermal analysis. The main thermal analysis technique used was the reaction calorimetry. Firstly, the instrumental response study of the calorimeter was led. A new calibration method have been proposed, this method is based on the calibration by Joule effect. From this correction, a more accurate kinetic evaluation can be done in order to study the complex mechanisms as those met with oil products. In a second time, the study of the neutralization of sulfuric acid by a marine cylinder lubricant was carried out. This work allowed to develop a routine analysis method to compare the lubricant ability to neutralize a precise amount of sulfuric acid. The time estimation is important to determine the frequency of lubricant replacement and to avoid the damage on the metallic parts. A kinetic study of the neutralization phenomena using isoconversional kinetic method, allowed to obtain the reactional model. Finally, the influence of parameters choice such as temperature, heating rate or cooking time have been evaluated by thermal and rheological analysis. Greases have been produced in a reaction calorimeter using a stirring system specifically developed. Information obtained allow to choose accurately the parameters used during the manufacturing processes in order to save time and decrease production costs
Dumas, Angela. "Élaboration de nouveaux procédés de synthèse et caractérisation de talcs sub-microniques : de la recherche fondamentale vers des applications industrielles". Toulouse 3, 2013. http://thesesups.ups-tlse.fr/3999/.
Texto completoThis thesis takes part of the general process of innovation in the domain of composite materials. The funding by the ANR NANOTALC project allowed significant progress in the process of production of new talc-like mineral nanofillers. The talc synthesis process has been revised in order to achieve compatibility with industrial requirements in terms of performance and efficiency. This new process replaces the previous ones since it saves time, leads to a 100% talc product having a high crystallinity, in the respect of few principles of the green chemistry. The crystal-chemistry characterization of the new synthetic talc shows new spectral signatures related to nanoscale dimensions, which allow also understanding of some until now unexplained behavior of natural powders. The synthetic talc derived from this new process differs from its natural counterpart in its submicron size, its chemical and mineral purity and also in its hydrophilic character, which is enhanced by the abundance of particle edges bearing silanol functions. This thesis also describes the various techniques tested to optimize this process and provides a new technical solution for the implementation of the synthesis on a semi-industrial scale
Fourdinier, Marion. "Etude d'un procédé industriel continu de synthèse catalytique d'un produit chimique". Phd thesis, Université d'Orléans, 2010. http://tel.archives-ouvertes.fr/tel-00858400.
Texto completoTheunissen, Cédric. "Développement de Nouveaux Procédés de Fonctionnalisation Directe d'Arènes et de Réactions de Polycyclisation Cationique". Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/239254.
Texto completoDoctorat en Sciences
info:eu-repo/semantics/nonPublished
Crouzet, Camille. "Procédés géo-inspirés pour la valorisation de déchets industriels ferreux et la synthèse de phosphates pour le stockage de l'énergie". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAU019.
Texto completoTwo areas of research relatively different were investigated during this Ph.D thesis at the boundary between process engineering, geosciences and material sciences through the valorization of ferrous byproducts and the synthesis of iron phosphates for energy storage applications. The common thread of this work was the use of our knowledge in redox and natural hydrothermal processes as a geo-inspiration source for the development of novel industrial processes.In the first and main part of this manuscript, we propose a novel valorization path for ferrous wastes and byproducts through the recovery of iron oxides and the production of hydrogen. This process is inspired from natural hydrogen production observed in mid-Atlantic ridges where ferrous iron content of magmatic minerals is oxidized by liquid water leading, among others, to hydrogen production and magnetite (Fe3O4) formation. Applying the same oxidation process to ferrous byproducts (metal Fe or ferrous iron FeO) enables the development of a novel valorization path. A first study is conducted on the identification of hydrothermal oxidation mechanism of reagent grade FeO and the influence of mild acetic acid on oxidation kinetic. This process is then applied to steel slag, a steel-making byproduct mainly composed of calcium but also of 15 to 25 %w FeO. The major result of this study was found in the characterization of magnetite as nanoparticles, a highly valuable product. In addition, we propose to complete the valorization process of steel slag by performing mineral CO2 sequestration (at room and high temperature).The second part of this Ph.D manuscript is dedicated to the synthesis of iron phosphates for energy storage applications. For mobile applications, this storage is nowadays mainly performed by lithium batteries. For these devices, a particular interest is given to lithium iron phosphates as positive electrode material for their ability to insert and disinsert lithium in its olivine related structure, modifying its chemical composition from LiFe2+PO4 (LFP) to Fe3+PO4 (FP). The main goal of this second part is to propose a novel synthesis path for FP through a two-step process with 1) the synthesis of a sarcopside related material Fe2+3(PO4)2 (a pseudo-olivine structured rare mineral) and 2) its isostructural oxidation in air to form the targeted FP material. This oxidation step leads to the partial solid migration of iron (exsolution mechanism) from the core to the surface and its precipitation as hematite, Fe2O3. For the sake of new materials as positive electrode, this process is then applied to the oxidation of maricite NaFe2+PO4 into Na3Fe3+2(PO4)3
Borg, Pascale. "Comparaison entre différents procédés de synthèse de triacyglycérols d'acides gras polyinsaturés n-3 par voie enzymatique en milieu non-conventionnel". Vandoeuvre-les-Nancy, INPL, 2000. http://www.theses.fr/2000INPL081N.
Texto completoZenasni, Mohamed Amine. "Synthèse et caractérisation des nanocomposites biodégradables élaborés par trois procédés (intercalation en solution, polymérisation in situ et par voie fondue)". Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0290/document.
Texto completoThe introduction of nano-fillers into polymers field lead to the creation of the nanocomposites. This creation is starting up a new revolution into the world of materials. Nanocomposites are similar to traditional composite of a polymer blend and filler with at least one nano-scopic dimension. In our project, we worked with nanocomposites of biodegradable polymers: polyacidlactic and polycaprolactone, combined with different nanoclays "kaolin and bentonite" and with different nano-organo-clays. These nanocomposites have been prepared by different methods (solution intercalation, in situ polymerization and melt mixture methods). The advantage of these polymers is their degradability and biocompatibility. A study of the relationship between development, microsctructure and physico-chemical properties of nanocomposites, clays modified with 3-aminopropyltriethoxysilane (APTES) and Hexadecyltriméthy ammonium bromide (CTAB) and untreated clays were made. In situ polymerization and melt mixture methods are most suitable methods to get a better dispersion named exfoliation. The study of the adsorption capacity of Co (II), Cd (II), Cu (II) and Ni (II) by these two raw adsorbents (kaolin and bentonite) increases significantly with increasing pH. This capacity is two and half times higher in the case of bentonite than in kaolin. The comparative study of adsorption kinetics, we revealed rapid kinetics of the order of 6 minutes for the Co (II), 10 min for the Ni (II), 15 min for the Cd (II) and an average kinetic order of 120 minutes for Cu (II) both for the bentonite that for kaolin. The study of the adsorption of Co (II), Cd (II), Cu (II) and Ni (II) by these materials (raw clays, organically and nanocomposites prepared by different methods) shows that the adsorption capacity of these heavy metals is important in the case modified clay by APTES
Guerold, Vincent. "Synthèse et caractérisation de films de zircone préparés par deux procédés optimisés de dépôt chimique et physique en phase vapeur". Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL120N.
Texto completoYactine, Bassem. "Synthèse et caractérisation de silicones fonctionnels par polymérisation par ouverture de cyclosiloxanes". Montpellier 2, 2008. http://www.theses.fr/2008MON20216.
Texto completoHergel, Jean. "Synthèse de formes fabricables à partir de spécifications partielles". Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0003.
Texto completoThe Rapid Manufacturing techniques that emerged from Rapid Prototyping techniques such as 3D printing or laser cutting allow to fabricate unique objects. However, the design of those objects with existing CAD software remain a difficult task: rapid prototyping processes impose constraints on the geometry of the model. This thesis presents a set of techniques that assist the user in the design of an object by taking into account the constraints of the fabrication process. To achieve this, the algorithm automatically performs part of the modelling process. The following problems have been tackled: First, I propose to improve the quality of 3D printed objects by minimizing defects that appear during the fabrication. The technique developed impacts only the algorithm that drives the printer. Then, I propose to help the user to take into account the fabrication constraints during the modelling process. My techniques rely on partial information about the shape that the user wants to fabricate like the 2D sketch of a mechanism or a parametric model of a furniture. The algorithm optimizes the initial shape to improve fabrication objectives(Wastage, etc.) Finally, in some cases, the user does not know how to operate dedicated software. In this case, I propose a synthesis technique of furniture from functionnal specification, e.g. loads that have to be supported in space
Labarthe, Émilie. "Nouvelle stratégie d'élaboration de la N-aminopipéridine via l'acide hydroxylamine-O-sulfonique : synthèse, modélisation cinétique, équilibres entre phases, extraction et procédés". Lyon 1, 2008. http://www.theses.fr/2008LYO10319.
Texto completoChemat, Farid. "Le chauffage micro-ondes dans les procédés de synthèse organique : application à l'hydrolyse des nitriles et à la pyrolyse de l'urée". Toulouse, INPT, 1994. http://www.theses.fr/1994INPT017G.
Texto completoDospinescu-Rosu, Ana-Maria. "Synthèse et étude d'amidons modifiés pour le développement de procédés d'oxydation du benzo[a]pyrène, un modèle de polluant organique persistant". Thesis, Littoral, 2011. http://www.theses.fr/2011DUNK0372/document.
Texto completoMy researchs concern remediation of polluted soil by polycyclic aromatic hydrocarbons (PAH) with the benzo[a]pyrene (BaP) as a model of persistent organic pollutant. The persistence of these molecules into soil is mainly due to both limiting parameters: their weak biodisponibility due to their low aqueous solubility and the difficulty for microorganisms of starting the oxidation of such stable molecules. Our approach consisted in the use of polysaccharides like starch matrix for stimulating the solubilization of BaP and allowing on such support the Fenton reaction (Fe²⁺+H2O2 → Fe ³⁺+ OH -+ OH ⁺) as a producer of high oxidant i.e. the hydroxyl radicals OH ⁺. A theoretical computer modelling study conducted on potato starch permits to identify the preferential sites for BaP and iron complexation. Thereafter, the experimental study aimed the chemical modification of starch using two types of alkylated agents i.e. epoxides and anhydrides of carboxylic acids. After the chemical characterization of these molecules by NMR and FTIR spectroscopy, the structure activity relationship between the modified starches, BaP and Fe2+ (as studied by fluorescence, SEM and SEM-EDS) allowed the screening of modified starches and the selection of the most soluble starches and the most effective one in BaP solubilization. For example, the molecule of starch (P17) bi-alkyl substituted by an epoxy group with three carbons and an anhydride with eleven carbons has an aqueous solubility of 4,41 g/L (native starch 0,4 g/L) and a capacity to stimulate the BaP solubility by a 20-factor. The last step of this work approaches, in vitro, the potential application of the modified starch for BaP degradation. The tests carried out with Fenton reaction suggested an original hypothesis based on the production of carbohydrate radicals having a higher half-life time compared with that of the hydroxyl radical itself, conferring them a better capacity to reach and to oxidize BaP. The first tests coupling chemical oxidation and the potentialities of fungal degradation must be still optimized in order to use all the potential biodiversity of fungi
Cercetările acestei teze se înscriu în cadrul unei probleme de remediere a solurilor poluate cu hidrocarburi aromatice policiclice (HAP),având ca model de poluare benzo [a] pirenul (BaP). Persistenţa acestor moleculelor, de acest tip, în soluri este dată în principal de doi parametri limitanţi: biosponibilitatea lor scăzută, datorită solubilităţii apoase scăzute, şi dificultatea, pentru microorganisme de a oxida aceste molecule stabile. Abordarea nostră constă în utilizarea polizaharidelor, având ca suport amidonul: ca matrice permanentă de stimulare a solubilităţii BaPului şi ca suport în reacţia Fenton (Fe²⁺+H2O2 → Fe ³⁺+ OH -+ OH ⁺) producătoare de un oxidant foarte puternic precum radicalul hidroxil OH ⁺. Un studiu teoretic de modelare moleculară a permis punerea în evidenţă în molecula de amidon a unor site-uri de fixare preferenţiale atât pentru BaP cât şi pentru cationul Fe²⁺. Apoi, un studiu experimantal a avut ca obiectiv sinteza chimică a amidonului modificat utilizând două tipuri de agenţi de alchilare: epoxizii şi anhidridele acizilor carboxilici. După caracterizarea chimică a acestor molecule prin spectroscopie RMN şi FTIR, studiile de relaţie structură-activitate (prin fluorescenţă, MEB şi MEB-EDS) între amidonurile modificate, BaP şi cationul Fe²⁺ au permis verificarea a douăzeci de molecule de amidon modificate şi selecţionarea amidonurilor modificate cele mai solubile şi mai eficace în solubilizarea BaPului. De exemplu, molecula de amidon (P17) bialchilată printr-un epoxid cu trei atomi de carbon şi o anhidridă cu unusprezece carboni, prezintă o solubilitate apoasă de 4,41 g/L (faţă de amidonul nativ 0,4 g/L) şi o capacitate de stimulare a solubilităţii BaP de un factor 20. Ultima etapă a acestei teze de doctorat abordează, in vitro, aplicaţiile potenţiale ale amidonurilor modificate pentru degradarea BaPului. Încercările realizate cu reacţia Fenton ne sugerează o ipoteză originală în care se pare că matricea polizaharidică produce radicali carbohidraţi posedând un timp de viaţă superior, comparativ cu cel al radicalului hidroxil, conferind o mai bună capacitate de captare şi oxidare a BaPului. Primele încercări cuplând oxidarea chimică şi potenţialitatea de degradare prin fungi saprotrofi mai trebuie încă optimizată pentru utilizarea întregului potenţial de biodiversitate a fungilor