Bibliografías temáticas / Cumene

Índice

  1. Artículos de revistas
  2. Tesis
  3. Libros
  4. Capítulos de libros
  5. Actas de conferencias
  6. Informes

Literatura académica sobre el tema "Cumene"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte las listas temáticas de artículos, libros, tesis, actas de conferencias y otras fuentes académicas sobre el tema "Cumene".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Artículos de revistas sobre el tema "Cumene"

1

Young, Jay A. "Cumene". Journal of Chemical Education 83, n.º 7 (julio de 2006): 989. http://dx.doi.org/10.1021/ed083p989.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
2

Yang, Wei-Jun, Can-Cheng Guo, Neng-Ye Tao y Jun Cao. "Aerobic oxidation of cumene to cumene hydroperoxide catalyzed by metalloporphyrins". Kinetics and Catalysis 51, n.º 2 (marzo de 2010): 194–99. http://dx.doi.org/10.1134/s0023158410020047.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
3

Shen, Hai M., Hong L. Ye, Qin Wang, Meng Y. Hu, Lei Liu y Yuan B. She. "Efficient oxidation of cumene to cumene hydroperoxide with ambient O2 catalyzed by metalloporphyrins". Journal of Porphyrins and Phthalocyanines 25, n.º 04 (31 de marzo de 2021): 314–22. http://dx.doi.org/10.1142/s1088424621500310.

Texto completo
Resumen
A novel and efficient protocol for oxidation of cumene to cumene hydroperoxide was presented using ambient O2 catalyzed by very simple metalloporphyrins. The selectivity toward cumene hydroperoxide reached 98.3% in the cumene conversion of 28.1% with T(4-COOH)PPCu as a catalyst at 80[Formula: see text]C. The origin of the higher performance of T(4-COOH)PPCu was mainly ascribed to the low catalytic performance of copper(II) in the cumene hydroperoxide decomposition, and the ability of T(4-COOH)PP in stabilizing cumene hydroperoxide through hydrogen-bond interactions between them. Compared with current industrial processes and academic research in oxidation of cumene to cumene hydroperoxide with O2, the main superiorities of this protocol were the high selectivity, high conversion, simple catalysts, solvent-free, additive-free and mild conditions which made this work an appealing reference for the industrial oxidation of cumene to cumene hydroperoxide, as well as the oxidative functionalization of other C-H bonds in various hydrocarbons.
Los estilos APA, Harvard, Vancouver, ISO, etc.
4

Di Somma, Ilaria, Raffaele Marotta, Roberto Andreozzi y Vincenzo Caprio. "Detailed thermal and kinetic modeling of cumene hydroperoxide decomposition in cumene". Process Safety and Environmental Protection 91, n.º 4 (julio de 2013): 262–68. http://dx.doi.org/10.1016/j.psep.2012.07.001.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
5

Duh, Y. S., C. S. Kao, C. Lee y S. W. Yu. "Runaway Hazard Assessment of Cumene Hydroperoxide From the Cumene Oxidation Process". Process Safety and Environmental Protection 75, n.º 2 (mayo de 1997): 73–80. http://dx.doi.org/10.1205/095758297528832.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
6

Matsui, S. y T. Fujita. "New cumene-oxidation systems". Catalysis Today 71, n.º 1-2 (noviembre de 2001): 145–52. http://dx.doi.org/10.1016/s0920-5861(01)00450-3.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
7

Ishida, T. y T. Matsumoto. "Enantioselective metabolism of cumene". Xenobiotica 22, n.º 11 (enero de 1992): 1291–98. http://dx.doi.org/10.3109/00498259209053157.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
8

Hou, Ching T., Thomas A. Seymour y Marvin O. Bagby. "Microbial oxidation of cumene". Journal of Industrial Microbiology 13, n.º 2 (marzo de 1994): 97–102. http://dx.doi.org/10.1007/bf01584105.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
9

Hsu, Ying Fang y Cheu Pyeng Cheng. "Polymer supported catalyst for the effective autoxidation of cumene to cumene hydroperoxide". Journal of Molecular Catalysis A: Chemical 120, n.º 1-3 (junio de 1997): 109–16. http://dx.doi.org/10.1016/s1381-1169(96)00442-6.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
10

Liao, Shixia, Feng Peng, Hao Yu y Hongjuan Wang. "Carbon nanotubes as catalyst for the aerobic oxidation of cumene to cumene hydroperoxide". Applied Catalysis A: General 478 (mayo de 2014): 1–8. http://dx.doi.org/10.1016/j.apcata.2014.03.024.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
Más fuentes

Tesis sobre el tema "Cumene"

1

Lu, Yuan. "Reaction mechanism of cumene hydroperoxide decomposition in cumene and evaluation of its reactivity hazards". [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2904.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
2

Tuli, Leepika. "Proteome Profiling of Saccharomyces cerevisae stress response to Cumene Hydroperoxide (CHP)". Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28620.

Texto completo
Resumen
Oxidative stress, described as the state of disturbed intracellular redox balance, has been associated with several human conditions including ageing, apoptosis, cancer, autoimmune and neuro-degenerative diseases. Stress studies have shown that reactive oxygen species (ROS) and reactive nitrogen species (RNS) along with its intermediates can attack essential cell targets such as: DNA, proteins, lipids and carbohydrates, leaving behind dysfunctional biologic molecules. In effect, a cellâ s primary response is to involve several defense mechanisms that are under a complex and intricate regulatory control to repair any damages that may have occurred. Although several stress studies have been conducted in the past that have approached this biologically complex process step by step, application of a Systems Biology towards a comprehensive understanding is still emerging. The current objective of this project is to identify proteins that change in response to cumene hydroperxoide (CHP) treatment and in parallel make an attempt to uncover events and processes that are a part of CHP-induced oxidative stress response. From a systems biology viewpoint, the Yeast Oxidative Stress project will monitor response at three different levels: transcriptomics, proteomics and metabolomics, with dynamic changes being measured from 3 to 120 min after CHP addition. Data collected from the different levels will be integrated to accomplish a holistic viewpoint of stress response in the given system and to develop mathematical tools for modeling biochemical networks. Saccharomyces cerevisiae was chosen as a model, based on its availability of a completely mapped genome sequence with a collection of null mutants that was relevant to our fundamental research of stress response mechanism. Yeast, a simple unicellular eukaryote has been extensively used for applied studies and has proven to be indispensable for stress research. Information derived from this project can reveal response mechanisms used by higher eukaryotes, especially if via analogous signaling cascades that are comparable between organisms. Current research investigates an optimal workflow for generating 2D gel based protein expression data and identifying proteins that are induced by cumene hydroperoxide treatment. A non-targeted protein profiling followed by a 2-way ANOVA analysis provided a list of proteins that differ significantly between treatments. Protein identification provided relevant information on which proteins are affected by CHP induced stress response, including posttranslational modifications of peroxiredoxins. Redox active protein, Ahp1, was regulated post-translationally with sulfonic acid modification observed for its active Cys(62) residue.
Ph. D.
Los estilos APA, Harvard, Vancouver, ISO, etc.
3

Hurgobin, Sooviraj. "The effect of synthesis and post-synthesis modifications on the activity of zeolite beta for cumene synthesis". Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/17951.

Texto completo
Resumen
Bibliography: pages 128-140.
The isopropylation of benzene to produce cumene is an important petrochemical process since cumene is used as a chemical intermediate for the production of phenol and acetone. In recent years, the good performance of zeolite Beta for this particular reaction has often been reported in the literature (Reddy et al., 1993, Bellussi et al., 1995 and Perego et al., 1996). It is known, from the numerous studies that have been carried out on other zeolite types, that post synthesis modifications such as dealumination of the zeolite framework tend to enhance the activity of these zeolites for catalytic reactions. Moreover, the effect of synthesis parameters on the catalytic activity of zeolite Beta is an important issue that has not been thoroughly investigated in the literature. In this study, a commercial parent zeolite Beta catalyst (sample A) was modified by post synthesis modifications such as steaming, acid washing or steaming followed by acid washing. A series of zeolite Beta catalysts were also synthesised by different techniques. The samples were characterised with respect to structure, morphology, particle size, number of acid sites, co-ordination state of aluminium and the environment of silicon atoms. The isopropylation of benzene to cumene was used as a test reaction to evaluate the effect of post-synthesis modifications and synthesis procedure on the catalytic activity of the zeolite Beta catalysts.
Los estilos APA, Harvard, Vancouver, ISO, etc.
4

Crites, Charles-Oneil. "Investigating the Interactions between Free Radicals and Supported Noble Metal Nanoparticles in Oxidation Reactions". Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/33404.

Texto completo
Resumen
This thesis studies the interaction between free radical species and supported noble metal nanoparticles (silver and gold) in the context of oxidation reactions. The peroxidation of cumene is the first reaction to be discussed and the difference in peroxidation product distribution using silver nanoparticles (AgNP) versus gold nanoparticles (AuNP) is examined. Specifically, cumyl alcohol is obtained as the major product obtained when using supported AuNP, whereas cumene hydroperoxide is favoured for AgNP. Such variations in product distribution are partially explained by the differences in the nanoparticle Fenton activity, where the TiO2 support was proposed to enhance such activity due to possible electron shuttling capabilities with the nanoparticle surface. Use of hydrotalcite as a support was found to minimize this characteristic, due to its insulator properties. The stability of hydroperoxide was tested in the presence of various others supports (activated carbon, Al2O3, ZnO, SiO2 and clays) with little success, with hydroperoxide exhibiting stability in the presence of HT. Using an oxygen uptake apparatus, the interaction of the cumyl peroxyl radical with the AuNP surface was demonstrated. Furthermore, this interaction promotes decomposition leading to the corresponding alkoxyl radical and subsequent hydrogen abstraction to form the observed cumyl alcohol product. The radical interaction with supported nanoparticles, and its reversibility appear different for gold and silver and accounts for a large part of the product distribution differences observed between AuNP and AgNP, as illustrated below. The peroxidation of ethylbenzene and propylbenzene was studied and revealed the participation of a reactive surface oxygen species due to the decomposition of peroxyl radicals on the nanoparticle surface. The reactive oxygen species was found to be transient in nature in the case of AuNP . Furthermore, this surface species was found to be an important participant in hydrogen abstraction leading to peroxide product formation. Finally, supported nanoparticle catalyzed tetralin peroxidation was investigated to determine the influence of temperature on the peroxidation product distribution and how changes in the reaction temperature can effect the radical-nanoparticle surface interactions.
Los estilos APA, Harvard, Vancouver, ISO, etc.
5

CABRAL, Rucilana Patrícia Bezerra. "Síntese e avaliação de NiMo/Beta e NiMo/SAPO-5 no hidrocraqueamento do cumeno com piridina". Universidade Federal de Campina Grande, 2008. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1695.

Texto completo
Resumen
Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-09-12T14:38:14Z No. of bitstreams: 1 RUCILANA PATRÍCIA BEZERRA CABRAL - TESE (PPGEP) 2008.pdf: 6571244 bytes, checksum: d2b524bd924cc294214a4507138e3b56 (MD5)
Made available in DSpace on 2018-09-12T14:38:14Z (GMT). No. of bitstreams: 1 RUCILANA PATRÍCIA BEZERRA CABRAL - TESE (PPGEP) 2008.pdf: 6571244 bytes, checksum: d2b524bd924cc294214a4507138e3b56 (MD5) Previous issue date: 2008-07-06
Devido ao aumento na produção de óleo pesado, a indústria do refino voltou-se para os processos de hidrocraqueamento (HCC) que fornecem combustíveis básicos e leves atendendo as exigências da sociedade moderna. O processo HCC é realizado, geralmente, sob temperaturas e pressões elevadas na presença do hidrogênio e de um catalisador de hidrocraqueamento. As cargas de petróleo brasileiras inevitavelmente contêm muitas impurezas, como os compostos orgânicos nitrogenados. Estes compostos de nitrogênio presentes nas cargas de hidrocraqueamento atuam como venenos temporários dos catalisadores, resultando numa diminuição de atividade destes catalisadores. Normalmente, os catalisadores de HCC compreendem de um suporte ácido mais um componente hidrogenante selecionado do Grupo VIB e do grupo VIII da Tabela periódica dos Elementos, na forma de óxido ou sulfeto. Zeólita Beta e SAPO-5 foram propostos para serem usados como suportes ácidos. A respeito do componente hidrogenante, a combinação de metais usados, expressada como óxidos, foi NiO-MoO3. Uma série de catalisadores NiMo suportados em Zeólita Beta e SAPO-5, de diferentes composições, foram preparados por impregnação seqüencial úmida dos materiais utilizando soluções aquosas precursoras de Ni(NO3)2.6H2O e (NH4)6 Mo7O24. 4H2O. Os suportes e catalisadores foram analisados pelas técnicas: Difração de raios-X (DRX), Espectrometria de Emissão Atômica de Plasma Acoplado Induzido (ICPAES), Adsorção Física de N2 pelo método BET, Redução com Temperatura Programada (RTP), Microscopia Eletrônica de Transmissão (MET), Espectroscopia no Infravermelho de piridina adsorvida (IV), Espectroscopia de Refletância Difusa (DRS) e Espectroscopia de Ressonância Magnética Nuclear (RMN). Os catalisadores NiMo sulfetados foram avaliados usando um reator tubular de fluxo contínuo, no hidrocraqueamento do cumeno na presença e ausência de piridina. Foi verificado que os catalisadores suportados em zeólita Beta promoveram maiores conversões que os suportados em SAPO-5, principalmente o que usou zeólita Beta (Si/Al=8,2) com 4%NiO e 15%MoO3. A presença da piridina foi prejudicial à performance de todos os catalisadores, inclusive para os padrões cedidos pelo CENPES.
Due to the increasing of the heavier crude oil feedstocks production, the oil refining industry has turned to hydrocracking (HCK) processes to provide the lighter basic fuels which modern society demands. The HCK process is generally carried out under high temperatures and pressures in the presence of the hydrogen and a HCK catalyst. The feedstocks of the Brazilian crudes inevitably contain many impurities, such as organic nitrogen compounds. These nitrogen compounds present in the feeds of hydrocracking process act as, temporary poisons to the catalysts, thereby decreasing the catalyst activity. Usually, hydrocracking catalysts comprise of an acidic support plus a hydrogenating component selected from the Group VIB metals and Group VIII metals of the Periodic Table of the Elements, in their oxide or sulfide form. Beta zeolite and SAPO-5 are proposed as acidic support materials for hydrocracking. Regarding the hydrogenation component the combination of the metals used in the form of oxides, was NiO-MoO3. A series of NiMo catalysts supported on Beta zeolite and SAPO-5, of different compositions, were prepared by sequential incipient wetness impregnation of the materials with aqueous solutions of Ni(NO3)2 . 6H2O and (NH4)6 Mo7O24.4H2O. The supports and catalysts were analyzed by several techniques such as: X-ray diffraction (XRD), plasma-emission spectrometry (ICP-AES), N2 physical adsorption by BET method, temperature programmed reduction (TPR), transmission electronic microscopy (TEM), infrared spectroscopy of adsorbed pyridine (IR), diffuse reflectance spectroscopy (DRS) and nuclear magnetic resonance (NMR) spectroscopy. The sulfide NiMo catalysts were evaluated using a continuous-flow tubular reactor by the cumene hydrocracking in the presence and absence of pyridine. It was verified that the NiMo catalysts based on Beta zeolite produced the highest cumene conversion than those based on SAPO-5, particularly the one with Beta zeolite (Si/Al=8,2) containing 4%NiO and 15%MoO3. The presence of nitrogen as pyridine was detrimental for the performance of all catalysts, including the standards one, supplied for the CENPES.
Los estilos APA, Harvard, Vancouver, ISO, etc.
6

VIMARD, FLORENCE. "Mecanismes d'action cytotoxique de l'hydroperoxyde de cumene sur la lignee pc12. Action protectrice du bfgf et des agents reducteurs des thiols". Caen, 1996. http://www.theses.fr/1996CAEN2051.

Texto completo
Resumen
De nombreux arguments directs ou indirects suggerent que les derives de l'oxygene (do) sont impliques dans les phenomenes de degenerescence neuronales observes a la suite d'un accident ischemique ou au cours de nombreuses maladies neurodegeneratives. Nous avons utilise une lignee cellulaire modele, la lignee pc12, et teste l'action cytotoxique d'un peroxyde exogene, l'hydroperoxyde de cumene. L'action cytotoxique de l'hydroperoxyde de cumene est rapide et provoque un detachement des cellules suivi d'une permeabilisation de la membrane plasmique. Le peroxyde touche de facon precoce le compartiment mitochondrial et le cytosquelette. Son action est egalement associee a une diminution de la concentration intracellulaire de glutathion et des thiols proteiques. La differenciation des cellules par le bfgf ou leur traitement par des donneurs de groupements thiols entraine une diminution de leur sensibilite au peroxyde. L'ensemble de ces resultats suggere l'importance de groupements thiols specifiques dont l'oxydation pourrait controler les fonctions mitochondriales
Los estilos APA, Harvard, Vancouver, ISO, etc.
7

Bayle, Jérôme. "Etude du contact gaz-solide dans un reacteur a co-courant descendant par la mise en oeuvre du craquage catalytique du cumene". Paris 6, 1996. http://www.theses.fr/1996PA066815.

Texto completo
Resumen
Les dernieres innovations du procede de craquage catalytique visent a optimiser le melange initial de la charge et du catalyseur et a reduire le temps de contact gaz-solide afin d'exploiter au mieux l'activite des nouveaux catalyseurs disponibles. Le downer dans lequel charge et catalyseur s'ecoulent a co-courant descendant devrait permettre de severiser davantage les conditions operatoires par rapport au mode d'ecoulement ascendant tout en maximisant conversion et selectivite en produits intermediaires recherches. Reste a demontrer l'efficacite du contact gaz-solide dans ce nouveau procede. Le probleme est delicat car le catalyseur et le gaz sont tous les deux en mouvement. Le recours a une reaction test, le craquage catalytique du cumene, permet d'apprecier efficacement le contact gaz-solide. Le cumene est une charge legere, ce qui elimine les problemes potentiels de vaporisation. Sa cinetique peut etre obtenue independamment sur lit fixe. L'importance de la trempe et d'une separation ultra-rapide des reactifs en sortie du downer fut mise en evidence. Des conditions operatoires assez severes en terme de temperature (550c) et de rapport massique catalyseur/charge (25/1) furent necessaires a l'obtention de conversions significatives. La desactivation du catalyseur induit un changement de selectivite avec le temps de contact a l'echelle de la seconde. Cet effet n'etait pas observable en lit fixe. Les donnees experimentales sont confrontees a un modele d'ecoulement piston monodimensionnel. La portee du modele est limitee du fait de la non prise en compte de la distribution granulometrique du catalyseur, des interactions solide-solide et des fluctuations de debits.
Los estilos APA, Harvard, Vancouver, ISO, etc.
8

Silva, Luciana Yumi Akisawa. "Determinação experimental e modelagem termodinamica de dados de equilíbrio de fases de misturas binarias e ternaria contendo acetona, agua e cumeno". [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266953.

Texto completo
Resumen
Orientador: Maria Alvina Krahenbuhl
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
Made available in DSpace on 2018-08-08T18:45:17Z (GMT). No. of bitstreams: 1 Silva_LucianaYumiAkisawa_M.pdf: 3646991 bytes, checksum: ba62402781e91d287e8cc031d8f12f30 (MD5) Previous issue date: 2007
Resumo: No projeto de processos de separação é essencial o conhecimento do comportamento das fases que estão em equilíbrio. O presente trabalho consistiu no estudo do equilíbrio de fases de misturas contendo acetona, água e cumeno. Estes componentes são de grande importância para a indústria do fenol. Os componentes água e cumeno são parcialmente miscíveis e na destilação da mistura de acetona, água e cumeno ocorre a formação de três fases (líquido-líquido-vapor), por isso é muito importante a determinação de um único conjunto de parâmetros dos modelos de GE que possa representar adequadamente o equilíbrio líquido-líquido simultaneamente. Determinou-se dados de equilíbrio líquido-vapor dos sistemas acetona + água,acetona + cumeno e acetona + água+ cumeno e dados de equilíbrio líquido-líquido do sistema água + cumeno a 760 mmHg. O Princípio da Máxima Verossimilhança foi utilizado no ajuste dos parâmetros de interação binária dos modelos NRTL e UNIQUAC.Os parâmetros obtidos neste trabalho foram comparados em trabalho anterior,Mafra (2005,) no qual se procedeu ao ajuste de dados ternários de equilíbrio líquido-líquido a 50 °C, e buscou-se o conjunto de parâmetros que melhor representa o equilíbrio líquido-vapor e líquido-líquido simultaneamente. Os resultados obtidos revelaram que o modelo NRTL com parâmetros determinados a partir de dados binários representa satisfatoriamente os equilíbrios líquido-vapor e líquido-líquido de sistemas binários e ternário envolvendo acetona, água e cumeno
Abstract: On projecting separation processes it is essential the knowledge of the behavior of the phases in equilibrium. The present work involved the study of the phase equilibrium of mixtures containing acetone, water and cumene, which are very important in the phenol industry. The components water and cumene are partially miscible, and in the distillation of the mixture of acetone, water and cumene occurs the simultaneous formation of three phases, two liquids and one vapor. In such a way this it is important the determination of only one set of parameters for GE models that can represent appropriately the vapor-liquid and liquid-liquid equilibrium. It has been determined vapor-liquid equilibrium data of acetone + water, acetone + cumene and acetone + water -"o cumene systems and liquid-liquid equilibrium data of water + cumene system at 760 mmHg. The Maximum Likelihood Principle was used for the estimation of the interaction parameters for the NRTL and UNIQUAC models. The parameters obtained in this work were compared with the parameters found by Mafra (2005). who realized the reduction of ternary liquid-liquid equilibrium data at 50°C. and it has been analyzed which set of parameters gives the best representation of the vapor-liquid and the liquid-liquid equilibrium simultaneously. The results have shown that the NRTL model with parameters determined by binary data represents properly the vapor-liquid and liquid-liquid equilibrium of binary and ternary systems containing acetone, water and cumene
Mestrado
Desenvolvimento de Processos Químicos
Mestre em Engenharia Química
Los estilos APA, Harvard, Vancouver, ISO, etc.
9

Camarasa, Eric. "Étude hydrodynamique et modélisation des réacteurs à gazosiphon d'oxydation du cumène". Vandoeuvre-les-Nancy, INPL, 2000. http://www.theses.fr/2000INPLA001.

Texto completo
Resumen
Un modèle général prédisant le comportement des réacteurs à gazospiphon d'oxydation du cumène a été développé. Le modèle inclut la cinétique de la réaction, le transfert de matière et l'hydrodynamique. Le modèle du film a été choisi afin de tenir compte d'une éventuelle accélération du flux d'absorption de l'oxygènee. La configuration de l'écoulement a été prise en compte et un modèle de cellules est utilisé pour décrire l'état de mélange des phases liquide et gaz. Les paramètres hdrodynamiques que sont le taux de vide et la vitesse de circulation du liquide, sont calculés avfec un modèle approprié qui repose sur des équations de bilan de forces et qui est ajusté au système industriel à l'aide de données expérimentales. L'étude expérimentale, faisant intervenir de nombreuses techniques de mesure, a été réalisée sur divers réacteurs (une colonne à bulles simple et trois réacteurs à gazosiphon) équipés avec différents distributeurs de gaz et en utilisant de l'eau, des solutions aqueuses alcooliques et le mélange organique industriel comme phases liquides. Une meilleure compréhension de l'influence des propriétés du liquide (en particulier le comportement coalescent) et de la distribution gazeuse sur l'hydrodynamique y compris les caractéristiques des bulles a été obtenue. Les régimes d'écoulement et les transitions de régime ont également été analysés avec différentes techniques de traitement de signal appliquées aux flucturations de pression. Finalement, le modèle général prédit les variations des concentrations et des paramètres hydrodynamiques le long du réacteur, il est ainsi capable de fournir une bonne description des réacteurs d'oxydation étudiés. L'analyse de sensibilité des paramètres et l'incorporation du modèle dans une procédure d'optimisation permettent d'aboutir à un certain nombre de règles de dimensionnement et de conduite des oxydeurs de cumène
A complete model for prediction of cumene oxidation air-Iift reactors has been developed. The model includes reaction kinetics, mass transfer and hydrodynamics. The film model has been chosen to account for an eventual enhancement of the oxygen absorption rate. The flow configuration has been taken into account and the cell model approach is used to describe the liquid and gas phase mixing behavior. Hydrodynamic parameters as the gas hold-up and the liquid circulation velocity, are calculated with an adequate model based on momentum balance equations and adjusted to the industrial system with experimental data. Experimental work involving numerous measuring techniques has been conducted in several reactors (one simple bubble column and three air-lift reactors) equipped with different gas distributors and using water, water-alcohol solutions and the industrial organic mixture as the liquid phase. A better understanding of the influence of liquid properties (particularly the coalescing behavior) and of the gas distribution on bubble and hydrodynamic characteristics has been obtained. Flow regimes and regime transitions have also been examined using different techniques of signal analysis applied to pressure fluctuations. Finally, the complete model predicts the variations of concentration and hydrodynamic parameters along the reactor and so is able to provide a good description of the cumene oxidation reactors. By performing parameter sensitivity analysis and by incorporating the model into an optimization procedure, guidelines for design, operation and scale-up of such reactors are proposed
Los estilos APA, Harvard, Vancouver, ISO, etc.
10

Silva, Marciéli. "Propagação de jamboleiro [Syzygium cumini (L.) Skeels]". Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2358.

Texto completo
Resumen
Syzygium cumini (L.) Skeels é espécie exótica nativa da Ásia, porém seu cultivo está espalhado em vários países, nos quais inclui-se o Brasil. Apesar de existir poucos plantios comerciais dessa fruteira, ela apresenta inúmeras possibilidades de uso, desde o mercado de frutas frescas até o processamento como compotas, licores, vinagre, geleias, tortas e doces. O objetivo deste trabalho foi testar técnicas de propagação visando obter protocolo apropriado para esta espécie. Os experimentos foram feitos no Laboratório de Fisiologia Vegetal e Unidade de Ensino e Pesquisa Viveiro de Produção de Mudas, da Universidade Tecnológica Federal do Paraná - Câmpus Dois Vizinhos. O armazenamento de sementes de jamboleiro foi realizado nos tempos de 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 e 360 dias. O armazenamento seguido de hidrocondicionamento foi em temperatura de 25 °C por 0, 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144 e 156 horas. Em ambos, percorrido cada período de tempo, as sementes foram postas para germinar e aos 60 dias avaliaram-se a porcentagem de germinação, índice de velocidade de germinação e tempo médio de germinação. Na mini-estaquia testou-se concentrações de ácido indol-butírico (AIB) (0, 2000, 3000 e 4000 mg.L-1) e tipo de estaca (Apical, mediana e basal). No experimento de estaquia testou-se concentrações de AIB (0, 5000 e 10000 mg.L-1) e concentrações de Benzilaminopurina (BAP) (0, 250 e 500 mg.L-1). No segundo experimento de estaquia testou-se técnicas de condicionamento (Ttestemunha, anelamento e alumínio), tempo de condicionamento (40, 60, 80 e 100 dias) e concentrações de AIB (0, 2000 e 4000 mg.L-1). Na alporquia foram empregados tipos de revestimento (papel transparente, papel alumino e plástico preto), concentrações de AIB (0, 2000 e 4000 mg.L-1), presença ou não de algodão e estações do ano. Tanto para mini-estaca, estaquias e alporquia analisaram-se a porcentagem de enraizamento, número de raiz, comprimento das três maiores raízes e presença de calo para alporquia e estaquia. Para o jamboleiro recomendou-se o armazenamento seguido de hidrocondicionamento por até 156 horas, a mini-estaquia mediana e basal sem a aplicação de AIB. E a alporquia foi o método que mais se destacou com maiores valores de enraizamento.
Syzygium cumini (L.) Skeels is an exotic species native to Asia, but its is cultivated a lot of countries, including Brazil. Although there are few commercial plantations of this fruit tree, it has many possibilities of commercialization, market of fresh fruits to processing such as jams, liqueurs, vinegar, jellies, pies and sweets. The objective of the work was to test propagation techniques in order to obtain an appropriate protocol for this species. The experiments were carried out in the Laboratory of Plant Physiology and Unit of Teaching and Research Nursery, at Federal Technological University of Paraná - Câmpus Dois Vizinhos. The storage of S. cumini seeds was during 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360 days. The storage followed by hydrocondicionamento in temperature of 25 °C during 0, 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144 and 156 hours. The germination percentage, germination speed index and average germination time after 60 days were evaluated, according each time. In the mini-cuttings, indole-butyric acid (IBA) concentrations (0, 2000, 3000, 4000 mg.L-1) and type of cuttings (apical, middle and basal) were tested. In the cutting experiment, IBA concentrations (0, 5000, 10000 mg.L-1) and Benzylaminopurine (BAP) concentrations (0, 250 and 500 mgL-1) were evaluated. In the second cutting experiment, conditioning techniques (control, ringing and etiolation), conditioning time (40, 60, 80 and 100 days) and IBA concentrations (0, 2000, 4000 mg.L-1) were tested. In the air layering we used types of coating (withoutcolor plastic, aluminum paper and black plastic), IBA concentrations (0, 2000 and 4000 mg.L-1), presence or not of cotton and seasons of the year. In order to evaluate the percentage of rooting, root number, length of the three largest roots, and presence of callus by cuttingFor the S. cumini it was recommended the storage followed by hydrocondicionamento for up to 156 hours, the use of middle and basal minicuttings without the IBA application. The air layering was the technique propagation that it was possible higher rooting values.
Los estilos APA, Harvard, Vancouver, ISO, etc.
Más fuentes

Libros sobre el tema "Cumene"

1

Gardner, R. Cumene: Criteria document for an occupational exposure limit. London: HSE Books, 1994.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
2

Li, Kong. Deactivation of silica-alumina catalyst during the cumene cracking reaction. Salford: University of Salford, 1988.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
3

Horea, Ion. Cumpene. București: Albatros, 1991.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
4

Cuming, Fred. Fred Cuming. London: New Grafton Gallery, 2000.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
5

Cuming, Fred. Fred Cuming. London: New Grafton Gallery, 1988.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
6

Cuming, Fred. Fred Cuming. London: New Grafton Gallery, 1987.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
7

Topp, LaRayne Meyer. Cuming County. Charleston, South Carolina: Arcadia Publishing, 2012.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
8

Monzonis-Vilallonga, Jorge Fuentes. La cumbre. Burgos: Editorial Dossoles, 2006.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
9

Sovente, Michele. Cumae. Venezia: Marsilio, 1998.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
10

Cumha agus Cumann. Baile Átha Cliath: Aisling Design, 1985.

Buscar texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
Más fuentes

Capítulos de libros sobre el tema "Cumene"

1

Gooch, Jan W. "Cumene". En Encyclopedic Dictionary of Polymers, 186. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3175.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
2

Patnaik, Pradyot. "Cumene". En Handbook of Environmental Analysis, 415–16. Third edition. | Boca Raton : Taylor & Francis, CRC Press, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315151946-84.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
3

Gooch, Jan W. "Cumene Hydroperoxide". En Encyclopedic Dictionary of Polymers, 186. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3176.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
4

Weber, Manfred, Jan-Bernd Grosse Daldrup y Markus Weber. "Noncatalyzed Radical Chain Oxidation: Cumene Hydroperoxide". En Liquid Phase Aerobic Oxidation Catalysis: Industrial Applications and Academic Perspectives, 15–31. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527690121.ch2.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
5

Fedorov, A. Yu, E. V. Volchenko, T. A. Romanova, I. N. Singirtsev y A. P. Gumenyuk. "The treatment of cumene hydroperoxide containing wastewaters". En Global Environmental Biotechnology, 311–17. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-017-1711-3_27.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
6

Sharma, Shivom, Zi Chao Lim y Gade Pandu Rangaiah. "Process Design for Economic, Environmental and Safety Objectives with an Application to the Cumene Process". En Multi-Objective Optimization in Chemical Engineering, 449–77. Oxford, UK: John Wiley & Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118341704.ch16.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
7

Vinila, M. L., K. Aparna y S. Sreepriya. "Optimization of Parametric Model of Cumene Reactor Using Loop Shaping Methodology and Dynamic Modeling of Reactor". En Advances in Intelligent Systems and Computing, 201–8. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30465-2_23.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
8

Ross, Ivan A. "Syzygium cumini". En Medicinal Plants of the World, 445–54. Totowa, NJ: Humana Press, 2003. http://dx.doi.org/10.1007/978-1-59259-365-1_26.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
9

Bährle-Rapp, Marina. "Eugenia cumini". En Springer Lexikon Kosmetik und Körperpflege, 195. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_3807.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
10

Lim, T. K. "Syzygium cumini". En Edible Medicinal And Non Medicinal Plants, 745–59. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2534-8_100.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.

Actas de conferencias sobre el tema "Cumene"

1

Naegeli, David W. "The Role of Sulfur in the Thermal Stability of Jet Fuel". En ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-298.

Texto completo
Resumen
The autoxidation of Jet A, dodecane, and a dodecane-15%-cumene blend doped with sulfur compounds were studied at 433 K. Oxygen, hydro peroxide and soluble gum were monitored during the autoxidation. Dodecane, cumene, and the dodecane-15%-cumene blend autoxidized rapidly, while Jet A had an induction period followed by a relatively slow post autoxidation. The results suggest that an inhibitor formed early in the post autoxidation of Jet A. Gum formed in the autoxidation of Jet A, whereas none was detected in dodecane, cumene, or dodecane-15% cumene. However, gum was detected in dodecane and dodecane-15% cumene doped with thiols and disulfides. Alkyl thiols and disulfides reduced the rate of autoxidation of dodecane, and there was an induction period in the formation of gum. Traces of sulfur (≈4 ppm) inhibited the autoxidation of dodecane-15% cumene in a way that resembled the post autoxidation of Jet A. Adding an organic base increased the rate of post autoxidation in Jet A and prevented formation of the oxidation inhibitor. An inhibition mechanism is proposed in which phenois are formed via acid-catalyzed decomposition of benzylic hydro peroxides.
Los estilos APA, Harvard, Vancouver, ISO, etc.
2

"Supported transition metals oxides and N-hydroxyphthalimide in catalysis of the liquid-phase oxidation of cumene". En Chemical technology and engineering. Lviv Polytechnic National University, 2021. http://dx.doi.org/10.23939/cte2021.01.106.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
3

Ayres, J. R. "Cument Status and Trends in Active Matrix LCD's". En Proceedings of European Meeting on Lasers and Electro-Optics. IEEE, 1996. http://dx.doi.org/10.1109/cleoe.1996.562423.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
4

CONSUL KASSARDJIAN, DANIEL, Flávio L. Schmidt y Bianca Souza da Costa. "Caracterização física e físico-química de Jambolão (Syzygium cumini)". En XXIV Congresso de Iniciação Científica da UNICAMP - 2016. Campinas - SP, Brazil: Galoa, 2016. http://dx.doi.org/10.19146/pibic-2016-51920.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
5

Tretiakova, Svitlana. "RESISTANCE OF SUNFLOWER LINES AND HYBRIDS TO OROBANCHE CUMANA WALLR". En Relevant Issues of the Development of Science in Central and Eastern European Countries. Publishing House “Baltija Publishing”, 2019. http://dx.doi.org/10.30525/978-9934-588-11-2_8.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
6

Nerys, Leylianne de Cássia Rodrigues, Maria Cristina Ribeiro da Silva, Marilia Grasielly de Farias Silva, Edson Renan Barros de Santana, Brunna Fernanda Lira Patriota, Ricardo Yara y Cláudia Sampaio de Andrade Lima. "AVALIAÇÃO DA ATIVIDADE ANTIOXIDADE DE Syzigium malaccense E Syzigium cumini". En Encontro Anual da Biofísica 2017. São Paulo: Editora Blucher, 2017. http://dx.doi.org/10.5151/biofisica2017-030.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
7

CORREIA, J. L. A., R. C. LEÃO, E. R. FLORENTINO, K. M. A. dos SANTOS, V. C. F. PIRES, O. M. MARQUES y I. M. FLORÊNCIO. "APROVEITAMENTO DO FRUTO JAMBOLÃO (SYZYGIUM CUMINI) PARA ELABORAÇÃO DE VINHO." En XX Congresso Brasileiro de Engenharia Química. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeq2014-0100-27044-148163.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
8

Babkin, Alexander, Elena Neskoromnaya, Irina Burakova, Ananstasia Kucherova, Alexander Burakov y Elina Mkrtchyan. "Kinetic characteristics of Cu (II) adsorption on nano(poly)-cumulene". En PROSPECTS OF FUNDAMENTAL SCIENCES DEVELOPMENT (PFSD-2017): Proceedings of the XIV International Conference of Students and Young Scientists. Author(s), 2017. http://dx.doi.org/10.1063/1.5009827.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
9

Anton, Florin Gabriel y Luxiţa Rîşnoveanu. "Sunflower genotypes with resistance / tolerance at parasite Orobanche cumana Wallr". En XIth International Congress of Geneticists and Breeders from the Republic of Moldova. Scientific Association of Geneticists and Breeders of the Republic of Moldova, Institute of Genetics, Physiology and Plant Protection, Moldova State University, 2021. http://dx.doi.org/10.53040/cga11.2021.048.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
10

"Application of cumin in nutrition science and medicine". En International Conference on Medicine, Public Health and Biological Sciences. CASRP Publishing Company, Ltd. Uk, 2016. http://dx.doi.org/10.18869/mphbs.2016.107.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.

Informes sobre el tema "Cumene"

1

JAREK, RUSSELL L., STEVEN M. THORNBERG, STACIA BARROW, DANIEL E. TRUDELL y TINA M. NENOFF. Energy Efficient Catalytic Reaction and Production of Cumene. Office of Scientific and Technical Information (OSTI), diciembre de 2001. http://dx.doi.org/10.2172/791886.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
2

Martínez del Pozo, Álvaro. La Biologi­a Molecular cumple 50 años. Sociedad Española de Bioquímica y Biología Molecular (SEBBM), enero de 2010. http://dx.doi.org/10.18567/sebbmdiv_rpc.2010.01.1.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
3

Lanier, Nicholas Edward. La Cumbre Update: Motivation, Objectives, and Progress. Office of Scientific and Technical Information (OSTI), agosto de 2017. http://dx.doi.org/10.2172/1378914.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
4

Hsu, Donald P., William M. Davis y Stephen L. Buchwald. Synthesis and Structure of a Seven Membered Cyclic Cumulene. Fort Belvoir, VA: Defense Technical Information Center, mayo de 1993. http://dx.doi.org/10.21236/ada265289.

Texto completo
Los estilos APA, Harvard, Vancouver, ISO, etc.
5

Reporte de Estabilidad Financiera - I semestre 2021. Banco de la República, mayo de 2021. http://dx.doi.org/10.32468/rept-estab-fin.sem1-2021.

Texto completo
Resumen
En virtud del mandato otorgado por la Constitución Política de Colombia y de acuerdo con lo reglamentado por la Ley 31 de 1992, el Banco de la Repú-blica tiene la responsabilidad de velar por la estabilidad de los precios. El adecuado cumplimiento de esta tarea depende crucialmente del manteni-miento de la estabilidad financiera. La estabilidad financiera se entiende como una condición general en la cual el sistema financiero (establecimientos, mercados e infraestructuras): 1. Evalúa y administra los riesgos financieros de una manera que facilita el desempeño de la economía y la asignación eficiente de los recursos; 2. está en capacidad de absorber, disipar y mitigar de manera autónoma la materialización de los riesgos que pueda surgir como resultado de eventos adversos. Ete Reporte de Estabilidad Financiera cumple el objetivo de presentar la apreciación del Banco de la República sobre el desempeño reciente de los establecimientos de crédito y sus deudores, así como sobre los principales riesgos y vulnerabilidades que podrían tener algún efecto sobre la estabili-dad financiera de la economía colombiana. Con este objetivo se pretende in-formar a los participantes en los mercados financieros y al público, además de promover el debate público sobre las tendencias y los riesgos que atañen al sistema financiero. Los resultados aquí presentados sirven también a la autoridad monetaria como base para la toma de decisiones que permitan promover la estabilidad financiera en el contexto general de los objetivos de estabilidad de precios y estabilidad macroeconómica. Este Reporte se complementa con el Reporte de Sistemas de Pago publicado anualmente por el Banco de la República, en el cual se divulga la labor de seguimiento a las infraestructuras financieras de la economía colombiana.
Los estilos APA, Harvard, Vancouver, ISO, etc.
También puede estar interesado en las bibliografías ampliadas sobre el tema "Cumene" para tipos de fuentes particulares:
Artículos de revistas Tesis Libros
Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!

Pasar a la bibliografía