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Selective Oxidation of Isobutane and Isobutene over Mo-Te Mixed Oxide Catalysts

Guan J. Q., Wu J. S., Shao Y. Q., Xu H. Y., Yang Y., Xu L., Zhen K. J., Kan Q. B.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 8

1571-1571

EN

A series of TeMox (x = 3–6) mixed oxides were prepared and investigated for the selective oxidation of isobutane and isobutene. Both the characterization results and the catalytic properties of the samples are quite different, depending on the composition of the calcined samples. Among them, TeMo3 catalyst showed the best total selectivity to methacrolein and methacrylic acid (as high as 46%), and their yield reached 10.1% at 400°C in the selective oxidation of isobutane. How ever, TeMo4 catalyst showed the best catalytic performance in the selective oxidation of isobutene, in which 73% selectivity to methacrolein and 9% selectivity to methacrylic acid can be obtained at 77.5% isobutene conversion at 440 graduate C.

2

Izobuten - otrzymywanie i zastosowanie w przemysłowej technologii organicznej

Ogonowski J., Skrzyńska E.

Nafta-Gaz

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2007

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R. 63, nr 9

556-564

PL

W artykule przedstawiono możliwe sposoby zagospodarowania izobutenu w przemysłowej technologii organicznej, a także przedstawiono alternatywną drogę jego otrzymywania w reakcji odwodornienia izobutanu w obecności ditlenku węgla. Podano typowe warunki prowadzenia procesu oraz stosowane katalizatory.

EN

The paper discusses the possibilities of isobutene application in the industrial organic technology. An isobutane dehydrogenation reaction in the presence of carbon dioxide was shown as an alternative way for obtaining this olefin. Typical processing conditions as well as using catalysts were also presented.

3

Odwodornienie izobutanu w obecności ditlenku węgla - analiza termodynamiczna procesu

Ogonowski J., Sikora E., Skrzyńska E.

Nafta-Gaz

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2005

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R. 61, nr 3

120-124

PL

W pracy przeprowadzono analizę termodynamiczną procesu odwodornienia izobutanu w obecności CO2 dla modelu stechiometrycznego obejmującego sześć reakcji liniowo niezależnych: reakcję odwodornienia izobutanu do izobutenu, reakcję gazu wodnego oraz reakcje termicznego krakingu izobutanu do niższych węglowodorów.

EN

In the work thermodynamic consideration of dehydrogenation of isobutane to isobutene in the presence of carbon dioxide was performed. Stoichiometric model established six linear independent reactions: dehydrogenation isobutane to isobutene, reverse water gas shift reactions and thermal cracking reactions of isobutane to light hydrocarbons.

4

The kinetics of ethers synthesis from alkenes and methanol catalyzed by the sulfonated styrene-divinylbenzene copolymer

Słomkiewicz P.M.

Polish Journal of Chemical Technology

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2004

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Vol. 6, nr 2

43-49

EN

The investigation of ethers synthesis on the acidic catalyst (sulfonated styrene-divinylbenzene copolymer Amberlyst 15) was carried out. For the experiments: methanol and alkenes (propene, isobutene, 2-methyl-1-butene, 2-methyl-2-butene, 2-methyl-1-pentene, 2-methyl-2-pentene, 2-methyl-2-hexene) were chosen. The influence of the parameters reaction (temperature, partial pressure of the reacting substances) on the course of etherification reaction was determined. The Langmuir-Hinshelwood heterogeneous kinetic model was used for the description of the kinetic etherification reaction. The adsorption equilibrium constants for the alkenes and alcohols on the sulfonated styrene-divinylbenzene copolymer Amberlyst 15 by separate measurements, were also determined with a gas chromatography method. The influence of the carbon chain length in the alkenes on the kinetic parameters of the etherification reaction and the influence of the sorption effects on rate of the reaction was determined.