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  • 1980-1984  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Catalytic Beckmann rearrangement of cyclohexanone oxime to caprolactam over metal sulfates (1983)
    Springer
    Reaction kinetics and catalysis letters 22 (1983), S. 197-202 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Бэкмановская перегруппировка циклогексаноноксима до капролактама была исследована в газовой фазе на сульфатных катализаторах. Наиболее активным и селективным образцом оказался Al2(SO4)3. Каталитическая активность увеличивается с электроотрицательностью металлических катионов. Селективность к капролактаму вероятно связана с некоторыми специфическими взаимодействиями между нитроксильными промежуточными соединениями и металлическими катионами. Исследввали эффект диспергирования Al2(SO)4)3 на окисном материале.
    Notes: Abstract The Beckmann rearrangement of cyclohexanone oxime to caprolactam has been studied in the vapor-phase over sulfate catalysts. Al2(SO4)3 was the most active and selective sample. Catalytic activity was found to increase with electronegativity of the metal-cation. Selectivity to caprolactam is probably related also to some specific interaction between nitrenium intermediates and metal cations. The effect of dispersing Al2(SO4)3 on an oxide material has also been investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064832
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Isomerization-disproportionation of m-xylene over dealuminated mordenites (1984)
    Springer
    Reaction kinetics and catalysis letters 25 (1984), S. 79-82 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Изомеризация-диспропорционирование м-ксилола было исс ледовано на серии деалюминированных морденитов, характеризуемых отноше нием Si/Al, изменяющимся от 5 до 15. Каталитическая активность увелич ивается с увеличением отношения Si/Al, а соответственно зтому и продукты диспропорционирования. Зто поведение обьясняется на основе увеличив ающейся кислотной силы, приводящей к высокой активности и селек тивности к диспропорционированию, через общий механизм, который включает в себя как параллельные, так и последовательные ступени.
    Notes: Abstract The isomerization-disproportionation of m-xylene has been investigated over a series of dealuminated mordenites characterized by Si/Al ratios varying from 5 to 15. Catalytic activity increases with the Si/Al ratio and correspondingly also the products of disproportionation. This behavior is interpreted in terms of increasing acid strength leading to a higher activity and selectivity to disproportionation through a common mechanism which involves both a parallel and a consecutive route.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02076544
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Solid-State Equilibria in the MoO3 - TeO2 - Al2O3 System (1984)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 510 (1984), S. 189-193 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die binären und ternären Gleichgewichte im System MoO3 - TeO2 - Al2O3 wurden rötgenographisch untersucht. Bei 750°C in Luft wurden in diesem System die im Abstract angegebenen koexistierenden Bereiche gefunden. Eine Bildung ternärer Verbindungen konnten im untersuchten Temperaturbereich (450 - 750°C) nicht beobachtet werden.
    Notes: The binary and ternary equilibrium reactions of Al2O3 with TeO2 and MoO3 were studied by X-ray diffraction methods and the following compatibility ranges were determined in the TeO2 - MoO3 - Al2O3 system at 750°C in air: TeO2, Te2MoO7, Al2TeO6; Te2MoO7, MoO3, Al2TeO6; MoO3, Al2(MoO4)3, Al2TeO6; Al2(MoO4)3, Al2O3, Al2TeO6. Ternary compound formation was not observed in the temperature range investigated (450 - 750°C).Phasengleichgewichte im System MoO3 - TeO2 - Al2O3.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19845100326
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    Paper (German National Licenses)
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