WorldCat Identities

Goutaudier, Christelle (19..-....).

Overview
Works: 27 works in 29 publications in 2 languages and 33 library holdings
Genres: Conference papers and proceedings 
Roles: Thesis advisor, Other, Opponent, Author, Editor
Classifications: QC1, 541.363
Publication Timeline
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Most widely held works by Christelle Goutaudier
XXIX JEEP : Journées d'étude des équilibres entre phases, Villeurbanne, France, 2-3 avril, 2003 by Journée d'étude des équilibres entre phases( Book )

1 edition published in 2004 in English and held by 3 WorldCat member libraries worldwide

Tungstates pour la conversion de fréquences laser par décalage Raman : relation propriétés structurales-propriétés vibratoires, croissance cristalline et caractérisations by Emmanuel Gallucci( Book )

2 editions published in 2000 in French and held by 2 WorldCat member libraries worldwide

Cette étude s'inscrit dans le cadre de la recherche de nouveaux matériaux optiques non linéaires à susceptibilité d'électriques du 3e ordre élevées pour l'émission laser, par décalage Raman, autour de 1.55 micromètres, cette longueur d'onde présentant des dangers minimes pour l'œil et un grand intérêt pour l'amplification des signaux transmis par fibre optique. Le but de ce travail était d'identifier les paramètres qui contrôlent le décalage Raman des tungstates et de comprendre leur influence, puis, sur la base des résultats obtenus, proposer, faire croître sous forme de cristaux et caractériser des matériaux intéressants pour la réalisation de systèmes lasers solides. Tout d'abord, une étude par spectroscopie Raman des familles AL(WO4)2 et L2(WO4)3, (A = {Li, Na, K, Rb} et L = {A1, Sc, Y, In, La, Ce, Nd, Eu, Gd, Yb, Lu}), a permis d'analyser et de comprendre l'évolution des caractéristiques de la bande de vibration de plus haute fréquence des composés. Il en a été déduit une cartographie des potentiels d'application des tungstates en optique non linéaire qui permet de cerner rapidement les matériaux répondant à un besoin physique donné. Les propriétés physico-chimiques de six composés ont ensuite été étudiées d'un point de vue stabilité thermodynamique dans les systèmes complexes concernés, structural et vibrationnel. Des monocristaux purs ou dopés par des terres rares ont été obtenus par une méthode type Bridgman-Stockbarger adaptée en flux. Les propriétés de luminescence, succinctement abordées montrent le potentiel d'application immense de cette famille chimique. Dans son ensemble, ce travail permet d'avoir à présent une vision globale, plus large de la famille tungstate et des individus qui la composent. L'effort de compréhension des propriétés physico-chimiques réalisé pourra à l'avenir servir de base à l'étude de base d'autres tungstates et on cerne à présent un peu mieux les qualités physiques de ces matériaux ainsi que leur potentiel d'application, mais également leur limites
I love montreal : Cahier de production( Book )

1 edition published in 2007 in French and held by 2 WorldCat member libraries worldwide

Elucidating the mechanism of the considerable mechanical stiffening of DNA induced by the couple Zn2+/Calix[4]arene-1,3-O-diphosphorous acid by Yannick Tauran( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Monocristaux cubiques de sesquioxydes Ln2O3 (Ln = Y, Lu et Sc) et de fluorures CaF2 dopés par l'ion terre rare laser Yb3+ : croissance, caractérisations structurale et spectroscopique by Sana Hraiech( Book )

2 editions published in 2007 in English and held by 2 WorldCat member libraries worldwide

This study concerns the search of a laser diode pumped Yb3+- doped laser materials for the near IR range. Two cubic single crystalline families were studied: sesquioxides (Y2O3, Lu2O3 and Sc2O3) and fluorides CaF2, whose optical properties were optimized. Our object is to develop the interpretation of Yb3+ sites structure by spectroscopy and to contribute to the mechanism luminescence quenching. LHPG (Laser Heated Pedestal Growth) technique was modified for the sesquioxides growth. Single crystal fibers have been grown by using this technique without crucible. Other fibers were also obtained by Micro-Pulling-Down using a new rhenium crucible. Structural and spectroscopic properties of absorption, emission and decay time have been performed. A special study were adopted to interpret the influence of OH- on the luminescence quenching after proton implantation. In the case of Yb3+- doped CaF2 grown by the µPD technique, we have analysed the influence of the monovalent alkali ions Li +, Na + and K+ as charge compensator. Co-doping Na+ was proved to be the best for the laser optimization: it prevent Yb3+ ions from clustering, and control the number of the types of sites. First results of laser tests of the Yb3+ ions in symmetry C3v with CaF2 not compensated are also shown
Croissance cristalline de polymères de coordination : synthèse, suivi calorimétrique et caractérisation structurale by Jade Clarisse( )

1 edition published in 2013 in French and held by 1 WorldCat member library worldwide

Porous coordination polymers so called Metal Organic Frameworks (MOFs) are considered for promising development and applications such as in catalyst. However, the understanding of the synthesis mechanisms and crystal growth is a challenge. Currently, only a few in-situ studies have been done to rationalize the synthesis of MOFs, such as monitoring by nuclear magnetic resonance, mass spectroscopy and energy dispersive X-ray diffraction. In this manuscript the differential scanning calorimetry is proposed as an easier technique to implement that allows a continuous calorimeter tracking to identify the phenomena which govern the synthesis such as the formation reaction and crystallization temperatures. With such thermal analyses, the temperature range of the reaction was determined and the importance of various parameters influencing the synthesis was studied, such as heating temperatures and cooling speeds or reactant concentration. This was applied to the synthesis of new porous coordination compounds based on porphyrin acid derivative in order to understand the important reaction steps. Crystal structure determinations show that some are Porphyrin Paddle-Wheel Frameworks. New approaches to the MOFs synthesis are also proposed using organic ligands like acids, imines, oximes and Schiff bases
Croissance et caractérisation de fibres monocristallines de nouveaux matériaux pour microlasers bleus et UV by Nader Kozhaya( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

Blue and UV lasers are currently used for many applications as data storage, medicine, micromachining, etc. The frequency conversion by means of non-linear crystals appears as a good solution to obtain coherent light sources from usual solid lasers emitting in the IR, no UV laser effect can be produced in any crystal. In this frame, we studied three materials (K3Li2-xNb5+xO15+2x (KLN), Ca5(BO3)3F (CBF) and Bi2ZnB2O7 (BZBO)) which possess promising non-linear optical properties. In this work, we studied two phase diagrams: K2O-Li2O-Nb2O5 and CaO-B2O3-CaF2 in order to determine and optimize the growth conditions of the corresponding crystals.We showed that µ-PD is a good technique for growing non congruently melting crystals (CBF) and crystals originating from a solid solution (KLN). The obtained single crystal fibres were transparent, homogeneous in composition and had a good crystalline quality. The study of the growth of KLN fibers showed that it is very difficult to obtain crystals oriented along the a axis with the used technique. With regard to CBF, the viscosity of the liquid requires to determine the most appropriate couple pulling rate/capillary diameter to obtain transparent crystals. For BZBO, the yellow-red colour of the obtained fibres is probably a consequence of the presence of another phase richer in bismuth
Borates de stoechiométrie LnBO3 et Ln3BO6 où Ln=Gd, Yb, ou Y borates doubles à base de terre rare et d'aluminium ou d'alcalins : propriétés physicochimiques et élaboration de monocristaux, étude de quelques propriétés spectroscopiques by Ouassila Aloui( Book )

1 edition published in 2002 in French and held by 1 WorldCat member library worldwide

Les recherches faisant l'objet de ce mémoire ont été orientées vers l'étude de différents composés boratés. Trois aspects ont été abordés : - délimitation du domaine d'existence - structure cristallographique et influence de la température sur l'état structural - élaboration de matériaux (poudres ou monocristaux) dopés par des ions Ce3+ ou Yb3+ en vue de tester l'applicabilité de leurs propriétés spectroscopiques. Trois séries de composés ont été abordées : -les borates de gadolinium Gd3BO6, GdBO3, Gd(BO2)3 à travers une étude approfondie du système binaire Gd2O3-B2O3, d'YbBO3 et YBO3; - l'orthoborate mixte d'aluminium et de gadolinium pour lequel le domaine d'existence a été délimité et les orthoborates mixtes Al, Lu, et Al-Y dopé Ce3+ ; - le borate mixte de lithium et de gadolinium Li6Gd(BO3)3 pour lequel des monocristaux dopés Yb3+ ont été élaborés
Croissance, caractérisations structurales et analyses spectroscopiques de fibres monocristallines de la famille des niobates Li Nb O3 (LN), Ba2 Na Nb5 O12 (Bnn) et Srx Ba1-x Nb2 O6 (SBN) à propriétés non linéaires by Abdesselem El Hassouni( Book )

1 edition published in 2004 in French and held by 1 WorldCat member library worldwide

L'optique non linéaire est au coeur de nombreuses études pour ces applications dans les lasers continus et à impulsions accordables en fréquences. Parmi les cristaux utilisés, les niobates sont largement développés pour leur stabilité structurale et leurs coefficients non linéaire élevés. Dans cette étude, nous avons synthétisé des fibres monocristallines appartenant à cette famille (Li Nb O3, Ba2 Na Nb5 O15 et Srx Ba1-x Nb2 O6) en optimisant leurs croissance grâce à deux techniques novatrices, l'une de zone flottante par chauffage laser (LHPG) au LPCML de Lyon, l'autre dite [micro]-PD à l'université Tohoku au Japon. La structure des cristaux a été caractérisée par les voies usuelles de chimie du solide et par l'utilisation de sondes structurales luminescentes, comme Yb3+. L'analyse spectroscopique de niobates dopés a permis de mesurer les potentialités laser, à l'auto-doublage de fréquences et d'entrevoir des applications du phénomène d'hystérésis de paires d'Yb3+ aux mémoires optiques
Élaboration et caractérisation de fibres cristallines de nouveaux matériaux pour la conversion de fréquence dans le domaine V-UV par la technique micro-pulling down by Farah Assi( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

The growing interest in compact all-solid state laser sources based on non-linear optical crystals emitting in the UV range is explained by their numerous applications such as photolithography, marking, micromachining, cutting or surgery. The only way to generate an ultraviolet laser light from an oxide crystal is by frequency conversion of a near-infrared source. In these conditions, the research works focus towards borate crystals due to their performance, transparency and resistance to laser damage. In this context, we have studied three borate materials: Bi2ZnB2O7 (BZBO), LaBGeO5 (LBGO) and BaCaBO3F (BCBF). Several BZBO crystal fibers were pulled under different conditions by micro-pulling down technique, in order to solve the problem of the orange-red color of the obtained fibers in previous works. The direct growth of LBGO fibers from the melt is impossible because of its excessive viscosity. It was then necessary to find a flux to reduce viscosity and provide crystals with good quality and usable dimensions. So, the LBGO-LiF phase diagram was studied and also the isoplethal section La2O3- LaBGeO5 in the La2O3-B2O3-GeO2 ternary system to examine the possibility of "self-flux". The growth of BCBF fiber being very difficult, the micro-pulling down technique is not appropriate, in its present version, for the growth of this material
Captage du CO2 par les amines demixantes by Fatiha Dergal( )

1 edition published in 2013 in French and held by 1 WorldCat member library worldwide

Nowadays, CO2 capture by amines solvents is the most advanced technology to reduce CO2 industrial emissions. However, this technology presents some concerns. The major problem of this process, using monoethanolamine (MEA), is the high energy needed to regenerate the solvent and makes the process of CO2 capture very expensive. In order to reduce the high cost associated to the energy of regeneration, various breakthrough processes have been studied within the framework of FUI «ACACIA» which include several companies (IFPEN, RHODIA/SOLVAY, ARKEMA, LAFARGE, Gas of France, VEOLIA) and four academic laboratories (LMOPS, LSA, LTIM (ex-LTSP), IRCELyon): - CO2 Capture with gas hydrate formation. - Use of enzymes leading to process of less energy-consuming. - Use of multiamines to increase the quantity of CO2 absorbed or demixing amines which only allow the regeneration of the rich phase in CO2 (low cost for regeneration energy). Our contribution into the consortium has been the study of seven demixing amines or multiamines: - Three commercial amines (the N-Methylpiperidine, 2-Methylpiperidine and the molecule A). - Four « multiamines » with confidentiel structures synthesized by LMOPS and denoted by the initials B, D, E, F. The demixing phenomenon is influenced by many factors such as temperature, the loading of the acid gas and the amine concentration of the solution. The understanding of this phenomenon is one of the objectives of this thesis. The essential data to estimate the potentials efficiency of solvent to capture CO2 is the isotherm of absorption. We have determined these isotherms at temperatures close to the absorber and regenerator units (respectively 40°C and 80°C) at different concentrations of amine ((26%, 30%, 50% and 66%) and pressures of CO2varying between 10 kPa et 200 kPa. The thermodynamic modelling of the isotherms of absorption allows to deduce important operating parameters of the process (cyclic capacity, average enthalpy of reaction, solvent flow...) and to dimension the absorption unit and to estimate its energy consumption. The experimental study has been completed by the determination of vapor-liquid equilibrium of pure amines and of different aqueous solutions of amines with the static method. These data allow anticipating the possible loss in amine in the regenerator. Among the studied amines, the one denoted with the initial « F » is a potential candidate for an industrial application energy-efficient (good CO2 absorption capacity, low regeneration energy, low volatility)
Stabilité des solutions aqueuses de borohydrure de sodium lors de la génération d'hydrogène par hydrolyse by Tatiana Vilarinho Franco( )

1 edition published in 2013 in French and held by 1 WorldCat member library worldwide

Numerous investigations are addressing both component optimization and development of miniature energy sources. The rise of portable eletronic devices, brings to the fore the crucial issues of power supply. The foresceable evolution in functionalities and utilizations, as regards portable eletronic devices, together with the introduction of novel electronic components, entail considerable changes in requirements, in terms of power consumption and autonomy. Hydrogen generation by means of the hydrolysis of borohydrides is a promising technology for portable fuel cells. Particularly, sodium borohydride (NaBH4) presents many advantages for that purpose. For example, NaBH4 solutions are non-flammable thus yielding safe processes; the rate of H2 generation is easily controlled by a catalyst; reaction products are environmentally benign and finally the reaction by-product can be recycled. The hydrolysis of NaBH4 in water to produce H2 gives by-products, NaBO2.yH2O, hydrated sodium borate according to MBH4 + (2+x) H2O → 4 H2 + MBO2.xH2O The interesting point of this work is to increase the amount of produced H2 in order to improve the energy density of the H2 generator system. For this, one of the main challenges is to increase the NaBH4 concentration of the cartridge solution thus avoiding the drawbacks induced by NaBO2 crystallization, but also to control the stabillity of this solution, it means add sodium hydroxyde to limit the NaBH4 self-decomposition, thus stabilizing the system. This work shows the two aspects of the analysis of the cartridge timelife : - The kinetic of spontaneous hydrolysis of alkaline aqueous NaBH4 solutions as function of NaOH concentration and the operation temperature range of the cartridge, - An unequivocal understanding of the NaBO2 crystallization process and more specifically the delimitation of the homogeneous liquid phase domain in the quaternary system NaBH4- NaBO2-NaOH-H2O, which represents the mixture present during the hydrogen cartridge operation
Caractérisation des phases solides colmatantes observées lors du traitement acide de minerais uranifères : contribution à l'étude des équilibres liquides-solides dans le système complexe Al - Fe - K - P - S - H2O (± Ca et Mg) by Angélique Teyssier( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Lors de l'extraction de l'uranium par lixiviation acide, AREVA fait face à des phénomènes transitoires de précipitation de phases mal cristallisées entrainant un colmatage des installations. Les analyses de ces précipités ont mis en évidence la formation d'un solide jaune minoritaire et d'un blanc majoritaire composé de sulfate de calcium et d'hydroxysulfate d'aluminium. Afin de comprendre les phénomènes menant à la précipitation et pour prévoir, éviter ou limiter leur apparition, les travaux de thèse ont consisté en l'étude expérimentale des équilibres solides-liquide du système complexe Al-Fe-K-P-S-H2O (± Ca et Mg) en milieu acide à 25°C, avec pour objectif l'identification des solides susceptibles d'apparaître en conditions industrielles. Les résultats permettront ainsi de compléter les bases de données thermodynamiques utilisées pour modéliser le comportement global du milieu lors des opérations. Après la mise au point de techniques analytiques appropriées, le travail s'est porté sur la délimitation des équilibres liquide-solides du système relatif au précipité blanc et particulièrement sur l'analyse des ternaires impliquant les hydroxysulfates d'aluminium. Le colmatage se produisant durant la phase d'acidification, l'évolution de la précipitation de ces hydroxysulfates en fonction du pH a été étudiée, afin de caractériser les solides formés en présence de cations minoritaires (Na+, K+, Mg2+, Ca2+) et de définir leurs constantes de solubilités à partir d'un modèle de calcul des coefficients d'activités des ions en solution. Des tests dynamiques sur colonne à partir de minerai naturel ont également été effectués et comparés aux résultats statiques
Matériaux magnétiques moléculaires : chimie de coordination de systèmes polymétalliques à base d'éléments d et f : synthèses, structures cristallines, magnétisme et relations magnéto-structurales by Ana Borta( )

1 edition published in 2009 in French and held by 1 WorldCat member library worldwide

Molecular magnetism is a field which gathers the magnetism of the simplest molecules but also that of very complex systems : high-spin molecules, molecular-based magnets, single molecule magnets, magnetic supramolecular buildings. Coordination chemistry is one way to obtain compounds with specific magnetic properties : ferromagnetic exchange interactions, uniaxial anisotropy, slow relaxation and quantum tunnelling of magnetization. In this context, the work presented here reports the synthesis and the detailed study of the crystal structures and interest of this study is the understanding of the magneto-structural relationships. In the fist chapter we give some elements of molecular magnetism. In the second chapter we present the results obtained by the association of 2-hydroxypyridine lignad, with cuII et LnIII ions. The syntheses lead to two different series of compounds : [Tu4Ln2] and [Cu8Ln2]. In the third chapiter we foaclized our attention on synthesis and study of new heptanuclear mixed-valence manganese complex with 2-OHBzIm ligand (2-hydroxybenzimidazole). The structure is formed by [Mn7(L]12]5+ core, consisting in a nearly planar Mn7 unit comprising a central Mn held within a Mn6 hexagon. The magnetic properties of this compound show a single molecule magnet behaviour. In the last chapter we report the results of the theoretical and experimental study of the antiferromagnetic exchange interactions ad the anisotropy in a dinuclear CoII complex from measurements made on large size single crystal. This study was completed with a polarized neutron diffraction study
Etude cristallochimique et physico-chimique de matériaux phosphatés et fluorophosphatés à base de cadmium by Mohamed Aboussatar( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

This work is devoted to the crystallographic study and the electrochemical and optical properties of cadmium phosphates and fluorophosphates. The investigation of the NaF - CdO - NaPO3 system revealed a new fluorophosphate of formula Na2CdPO4F and the polymorphism of the phosphate NaCdPO4. The crystal structures of these two phases were solved using XRD powder diffraction data, from materials obtained by a ceramic route. The characterization of the fluorophosphate Na2CdPO4F was also carried out by infrared spectroscopy, Raman scattering and Nuclear Magnetic Resonance. The electrochemical study, carried out on solid solutions of the Na2(Cd/Mn)PO4F type, revealed that the simultaneous presence of two divalent cations was beneficial for the improvement of the sodation/desodation rates. The luminescence properties of the red emitters NaCdPO4: Eu3+ and Na2CdPO4F: Eu3+ are closely correlated with the structural properties. Some formulations of NaCdPO4: Eu3+ type are of interest for application as red components in light emitting devices. The study of the LiF - CdO - NaPO3 system revealed the existence of an original fluorophosphate of formula Li4Na41Cd30P30O117F20. Its crystal structure, determined on monocrystal, is characterized by the presence of a novel entity PO3F2, where the phosphorus admits a five-fold coordination
Dissolution du dioxyde de carbone dans des solutions aqueuses d'électrolyte dans le contexte du stockage géologique : approche thermodynamique by Barbara Liborio( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

XXIXèmes JEEP, Journées d'Etude des Equilibres entre Phases : Villeurbanne, France, 2 et 3 avril 2003 by Journées d'étude des équilibres entre phases( Book )

1 edition published in 2003 in French and held by 1 WorldCat member library worldwide

Propriétes thermodynamiques des britholites CaxLay(SiO4)6-u(PO4)uO1, étude des propriétés de fixation et de diffusion des ions lanthanides et transuraniens dans les britholites : application dans le domaine des luminophores et du stockage des déchets nucléaires by Riadh El Ouenzerfi( Book )

1 edition published in 2003 in French and held by 1 WorldCat member library worldwide

Les travaux, objet de ce mémoire, concernent en particulier, la synthèse et la caractérisation des oxy-silicophosphates apatitiques. Cette étude traite en première partie de l'investigation du système quaternaire CaO-La2O3-SiO2-P2O5 afin de délimiter un domaine d'existence d'apatites phosphosilicatées pures. Ensuite, l'identification et la caractérisation des phases obtenues par les méthodes d'analyse chimique, de microsonde électronique, de DRX, et des spectroscopies IR et Raman. L'étude de la solubilisation et de la diffusion de l'uranium dans les matrices apatitiques a été réalisée à partir de la détermination de la limite de substitution, du degré d'oxydation ainsi que du coefficient de diffusion de l'uranium dans une apatite phosphosilicatée. Dans une deuxième partie, nous nous sommes intéressés à l'étude des propriétés de luminescence des ions Eu3+ et Ce3+ dans les apatites phosphosilicatées. Dans son ensemble, ce travail permet à présent d'avoir une vision globale, plus large, de la famille des apatites oxy-silicophosphatées et des conditions de leur synthèse. L'étude des propriétés physico-chimiques des britholites dopées aux ions actinides et lanthanides pourra à l'avenir servir de base à l'étude des propriétés optiques de ces matrices
Préparation électrochimique de la chloramine, élaboration d'alkylhydrazines par transfert de phases : application à la monométhylhydrazine by Christelle Goutaudier( Book )

1 edition published in 1993 in French and held by 1 WorldCat member library worldwide

L'ETUDE PRESENTEE AVAIT POUR OBJET L'ELABORATION D'ALKYLHYDRAZINES PAR ADAPTATION DU PROCEDE RASCHIG EN UTILISANT UNE REACTION DE TRANSFERT DE PHASES ET SON APPLICATION A LA SYNTHESE DE LA MONOMETHYLHYDRAZINE (MMH). DANS UN PREMIER TEMPS, LA MONOCHLORAMINE A ETE PREPAREE PAR ACTION D'EAU DE JAVEL SUR L'AMMONIAQUE. L'ALKYLHYDRAZINE A ETE ENSUITE FORMEE PAR REACTION EN MILIEU BIPHASIQUE DE NH2CL SUR L'AMINE EN EXCES. LES DIFFERENTES ETAPES ONT ETE LE CHOIX DU SOLVANT ET LA MESURE DES DIFFERENTS COEFFICIENTS DE PARTAGE, LA DETERMINATION DES DOMAINES D'EQUILIBRE SOLIDE-LIQUIDE-VAPEUR DU SYSTEME QUATERNAIRE MMA-H#2O-TBME-NAOH, L'ETUDE DE LA SYNTHESE EN MILIEU BIPHASE DE LA MMH EN DISCONTINU PUIS SON APPLICATION EN CONTINU SUR UNE UNITE PILOTE CONSTRUITE AU LABORATOIRE. DANS UN SECOND TEMPS, LA CHLORAMINE A ETE PREPAREE PAR ELECTROLYSE D'UNE SOLUTION AMMONIACALE D'HALOGENURE. L'INFLUENCE DES DIVERS PARAMETRES A ETE ETUDIEE ET UNE MODELISATION DES RESULTATS EXPERIMENTAUX EN FONCTION DES DENSITES DE COURANT IMPOSEES A ETE PROPOSEE
Thermodynamique des équilibres entre phases appliquée à la définition des conditions d'extraction et de purification de la N-aminopyrrolidine by Marie-Rose Frangieh( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

This global work is related to the synthesis, extraction and purification of a new exocyclic hydrazine with cosmetic applications, the N-aminopyrrolidine (NAPY). Firstable, the optimization of the synthesis conditions by the Raschig way are carried out by studying the influence of two parameters, the reagents' molar ratio and the temperature, on the yield of the reaction. Due to the very low hydrazine content in the reaction liquors (≈5%w of NAPY), the extraction and purification of the useful product are often linked to successive demixing and distillation operations. The determination of these separation conditions requires then the knowledge of thermodynamics' properties of the phase equilibria in these unitary steps. The optimization of the demixing needs then the study of the solid-liquid-liquid ternary solution NaOH/Pyrrolidine/Water. In this aim, three isothermal isobaric sections were studied, by combination of ATI (Isoplethic Thermal Analysis) and chemical analysis. The diameter and modulus method was developed in order to determine the composition of the critical point of the demixing curve. The distillation steps involve the liquid-vapor ternary system NAPY/Pyrrolidine/Water. The limit binary system Water/Pyrrolidine was determined by ebulliometry under atmospheric pressure. For a better understanding of the heteromolecular interactions in the liquid phase, two others liquid-vapor binary systems Water/Amine were obtained. The study of the ternary liquid-vapor system lad us to deduce two various distillation schemes. Once the synthesis and extraction conditions defined, a global process scheme was proposed, and NAPY was obtained in conformity with the cosmetical specifications
 
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Alternative Names
Tremblay, Christelle

Languages
French (18)

English (4)