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Contribution A Letude De Lisomerisation Catalytique Des Butenes En Isobutene
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Book Synopsis CONTRIBUTION A L'ETUDE DE L'ISOMERISATION CATALYTIQUE DES BUTENES EN ISOBUTENE by : JEANNINE.. SZABO MOINIER
Download or read book CONTRIBUTION A L'ETUDE DE L'ISOMERISATION CATALYTIQUE DES BUTENES EN ISOBUTENE written by JEANNINE.. SZABO MOINIER and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ISOMERISATION DES N-BUTENES EN ISOBUTENE EST REALISEE AU CONTACT DE CATALYSEURS SOLIDES TELS QUE LES ALUMINES OU SILICE-ALUMINES. APRES OPTIMISATION DES CONDITIONS OPERATOIRES (450C), NOUS AVONS ETABLI UN MODELE CINETIQUE POUR CETTE REACTION ET CARACTERISE CHAQUE ETAPE PAR UNE CONSTANTE DE VITESSE. 1) QUEL QUE SOIT LE BUTENE LINEAIRE DE DEPART, TOUTES LES ETAPES D'ISOMERISATION SONT DU PREMIER ORDRE. 2) LA MIGRATION DE LA DOUBLE LIAISON ET L'ISOMERISATION CIS-TRANS ONT LES VITESSES LES PLUS ELEVEES. 3) LES CONSTANTES CARACTERISANT L'ISOMERISATION SQUELETTALE SONT DE 5 A 10 FOIS PLUS FAIBLES QUE LES PRECEDENTES, ET MONTRENT QUE L'ISOBUTENE NE SE FORME QU'A PARTIR DES BUTENES-2. 4) CEPENDANT LA FORMATION DE SOUS-PRODUITS RESULTE DE PROCESSUS BIMOLECULAIRES QUI ENTRAINENT UNE BAISSE IMPORTANTE DE LA SELECTIVITE DES CATALYSEURS LES PLUS ACTIFS. 5) LES TROIS PROCESSUS SE DESACTIVENT AVEC DES VITESSES DIFFERENTES. CES RESULTATS PERMETTENT DE PREVOIR LA REPARTITION DES PRODUITS EN FONCTION DE L'AGE DU CATALYSEUR. LES CATALYSEURS LES PLUS ACTIFS SONT LES SILICE-ALUMINES, MAIS ILS SONT PEU SELECTIFS ET AUCUN AJOUT NE LES AMELIORE. LA MEILLEURE SELECTIVITE DES ALUMINES, ENCORE ACCRUE PAR L'AJOUT DE FLUORURE EST DUE AU FAIT QUE LEUR VITESSE D'ISOMERISATION SQUELETTALE EST PLUS ELEVEE RELATIVEMENT AUX ISOMERISATIONS DE DOUBLE LIAISON ET A LA METATHESE. UN FAIBLE AJOUT DE SULFATE AMELIORE LEUR STABILITE
Book Synopsis Contribution à l'étude de l'isomérisation catalytique du butène-1 au contact des zéolithes synthétiques by : Jean-François Tempere
Download or read book Contribution à l'étude de l'isomérisation catalytique du butène-1 au contact des zéolithes synthétiques written by Jean-François Tempere and published by . This book was released on 1968 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ISOMERISATION DES BUTENES EN ISOBUTENE SUR DES CATALYSEURS A PORES MOYENS by : LE.. LE NGOC HUNG
Download or read book ISOMERISATION DES BUTENES EN ISOBUTENE SUR DES CATALYSEURS A PORES MOYENS written by LE.. LE NGOC HUNG and published by . This book was released on 1997 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOTRE TRAVAIL A ETE CONSACRE A L'ETUDE DE L'ISOMERISATION SQUELLETALE DU BUTENE SUR DES ZEOLITES A PORES MOYENS (FERRERITE, ZSM-23, ETC.). PLUS PRECISEMENT, NOUS NOUS SOMMES ATTACHES A REPONDRE AUX QUESTIONS SUIVANTES : PAR QUEL MECANISME LE BUTENE EST-IL SELECTIVEMENT TRANSFORME EN ISOBUTENE, QUELLE EST LA NATURE DU SITE ACTIF ET QUELLES SONT LES CONDITIONS REQUISES POUR AVOIR UN CATALYSEUR SELECTIF. NOUS AVONS MONTRE QUE LE BUTENE EST SELECTIVEMENT TRANSFORME EN ISOBUTENE VIA UNE REACTION MONOMOLECULAIRE ET UN INTERMEDIAIRE METHYL-CYCLOPROPANIQUE ET NON PAS, COMME CELA ETAIT PROPOSE VIA UN MECANISME BIMOLECULAIRE. NOUS AVONS ETABLI QUE LE SITE ACTIF EST UN PROTON : CE PROTON N'EST SELECTIF QUE SI UNE CONTRAINTE SPATIALE EXISTE ET QUI INTERDIT LA FORMATION DE L'INTERMEDIAIRE OLEFINIQUE EN C8. CETTE CONTRAINTE SPATIALE (OU SELECTIVITE DE FORME) EST REALISABLE DANS LA POROSITE DE LA FER SOIT EN ECHANGEANT UNE PARTIE DES PROTONS AVEC DES IONS VOLUMINEUX TELS CS#+, SOIT EN DEPOSANT DU CARBONE (COKE) DANS LES CAVITES DE LA ZEOLITE AU COURS DU VIEILLISSEMENT SOUS REACTIF, SOIT EN ENCOMBRANT PARTIELLEMENT LES CAVITES EN EXTRAYANT DE L'ALUMINIUM DU RESEAU ZEOLITIQUE. NOUS AVONS GENERALISE NOS CONCLUSION A D'AUTRES MATERIAUX A POROSITE MOYENNE TELS LES ZSM-23 OU LES SILICO-ALUMINO-PHOSPHATES (SAPO-11 ET MEA1PO-11) ET NOUS AVONS MONTRE QUE LE CATALYSEUR D'ISOMERISATION SELECTIVE DU BUTENE EN ISOBUTENE ETAIT D'AUTANT PLUS SELECTIF QUE LA POROSITE EST ETROITE.
Book Synopsis Contribution à l'étude de l'isomérisation du 1-butène sur les catalyseurs isolants by : Serge Bielikoff
Download or read book Contribution à l'étude de l'isomérisation du 1-butène sur les catalyseurs isolants written by Serge Bielikoff and published by . This book was released on 1967 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Étude de l'hydrogénation et de l'isomérisation des butènes en présence de l'oxyde de zinc by : Jean-Michel Frénial
Download or read book Étude de l'hydrogénation et de l'isomérisation des butènes en présence de l'oxyde de zinc written by Jean-Michel Frénial and published by . This book was released on 1974 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DU CATALYSEUR EN PRESENCE DE BUTENES PAR CONDUCTIVITE ELECTRIQUE. ETUDE DE L'HYDROGENATION DE L'ISOBUTENE QUI NE S'ISOMERISE PAS ET CONDUIT EXCLUSIVEMENT A L'ISOBUTANE; CINETIQUE ET MECANISME DE LA REACTION. L'ETUDE CINETIQUE DE L'ISOMERISATION DES ETA -BUTENES PERMET D'ENVISAGER UN MECANISME RADICALAIRE POUR CETTE REACTION. ETUDE CINETIQUE DE L'HYDROGENATION DES ETA -BUTENES. DANS CE CAS L'ISOMERISATION EST SIMULTANEE
Book Synopsis Formaldehyde and Other Aldehydes by : National Research Council
Download or read book Formaldehyde and Other Aldehydes written by National Research Council and published by Legare Street Press. This book was released on 2023-07-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and detailed guide to the science of formaldehyde and other aldehydes. This book covers the physical and chemical properties of aldehydes, their behavior in the environment, and their potential effects on human health. It also includes a thorough review of the regulatory landscape surrounding these compounds. This book is essential reading for scientists and policymakers alike. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis Hydrocracking Science and Technology by : Julius Scherzer
Download or read book Hydrocracking Science and Technology written by Julius Scherzer and published by CRC Press. This book was released on 1996-08-06 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents advances in the field of hydrocracking. The volume includes catalytic materials, reaction mechanisms and pathways, as well as hydrocracking processes and applications. It discusses hydrocracking processes and hydrocracking technology in catalytic dewaxing, resid upgrading, and fluid catalytic cracking feedstock improvement
Book Synopsis Solid State Polymerization by : Constantine D. Papaspyrides
Download or read book Solid State Polymerization written by Constantine D. Papaspyrides and published by John Wiley & Sons. This book was released on 2009-04-27 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most current guide to solid state polymerization Solid State Polymerization (SSP)is an indispensable tool in the design, manufacture, and study of polymers, plastics, and fibers. SSP presents significant advantages over other polymerization techniques due to low operating temperatures, inexpensive equipment, and simple and environmentally sound procedures. Combining fundamentals of polymer science, chemistry, physical chemistry, and engineering, SSP also offers many research applications for a wide range of students and investigators. Gathering and filtering the latest literature on SSP, Solid Solid State Polymerization offers a unique, one-stop resource on this important process. With chapters contributed by leaders in the field, this text summarizes SSP, and provides essential coverage that includes: An introduction to SSP, with chemical and physical steps, apparatus, advantages, and parameters SSP physical chemistry and mechanisms Kinetic aspects of polyesters and polyamides SSP Catalysis in SSP processes Application of SSP under high pressure conditions in the laboratory Engineering aspects regarding process modeling and industrial application Recent developments and future possibilities Solid State Polymerization provides the most up-to-date coverage of this constantly developing field to academic and industry professionals, as well as graduate and postgraduate-level students in chemical engineering, materials science and engineering, polymer chemistry, polymer processing and polymer engineering.
Book Synopsis Industrial Uses of Large Radiation Sources by : International Atomic Energy Agency
Download or read book Industrial Uses of Large Radiation Sources written by International Atomic Energy Agency and published by . This book was released on 1963 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymer Science and Materials by : Arthur Victor Tobolsky
Download or read book Polymer Science and Materials written by Arthur Victor Tobolsky and published by Krieger Publishing Company. This book was released on 1980 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unsaturated Polyesters by : Herman V. Boenig
Download or read book Unsaturated Polyesters written by Herman V. Boenig and published by . This book was released on 1964 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymer Production by : Open University. T352 Course Team
Download or read book Polymer Production written by Open University. T352 Course Team and published by . This book was released on 1979 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Polymers written by Manfred Gordon and published by . This book was released on 1963 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Catalytic Chemistry by : Bruce C. Gates
Download or read book Catalytic Chemistry written by Bruce C. Gates and published by John Wiley & Sons. This book was released on 1992-04-16 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text aims to present catalysis in a coherent, unified and easy-to-teach manner. The subject traditionally appears as fragments in courses such as chemical reaction engineering, chemical engineering, kinetics, organometallic chemistry and physical chemistry.
Download or read book Polymer Networks written by A. Chompff and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: For several decades, polymer science has sought to rationalize the mechanical and thermodynamic properties of polymer networks largely within the framework of statistical thermodynamics. Much of this effort has been directed toward the rubbery rather than the glassy state. It is generally assumed that networks possess an av erage composition to which average properties may be assigned; from such a continuum view, a powerful analysis of such properties as modulus, swelling, birefringence and thermoelasticity has emerged. In the years following the rise of polymer characterization (the late 40's and early 50's), many scientists began to study ap parent relations between the properties of linear polymer molecules and the networks obtainable therefrom. This search was also stimu lated by the wide range of applications of polymer networks in com mercial elastomers, thermosets and coatings. Frequently, these data were confidently matched with curves obtained from statisti cally describable models of networks of ghost chains, uniformly distributed in space. More recently, it has become apparent that polymer chains in networks are not as ideal as assumed in the formulation of statis tical models, and there has been a shift in emphasis towards the less than ideal, perturbed and possibly inhomogeneous networks which are more frequently encountered in practice. The continuum approach, however, had to be developed before inhomogeneous systems could be described; the present volume, therefore, contains both views.
