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EN
A method of determining equilibrium constants of catalytic reactions was described using gas chromatography. Both the equilibrium constants and enthalpies of methyl-tert-butyl ether from methanol and isobutene, ethyl-tert-butyl ether from ethanol and isobutene on catalyst Amberlyst 15 in the gas phase were determined. The enthalpy values of these reactions were compared with the enthalpies calculated from thermodynamic data and the experimental data given in the literature.
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.
3
Content available remote Eter metylowo-tert-butylowy - metoda oznaczania
PL
Metodę stosuje się do oznaczania stężeń par eteru metylowo-tert-butylowego w powietrzu na stanowiskach pracy podczas przeprowadzania kontroli warunków sanitarnohigienicznych. Metoda polega na adsorpcji par eteru metylowo-tert-butylowego na węglu aktywnym, desorpcji mieszaniną dichlorometanu i izopropanolu oraz analizie chromatograficznej otrzymanego roztworu Oznaczalność metody wynosi 10 mg/m3.
EN
The method is based on the adsorption of methyl-tert-butyl ether on charcol, desorption with isopropanol and dichlo- romethane (1:1) mixture and gas chromatographic (GC-FID or GC-MSD) analysis of the resulting solution. The determination limit of the method is 10 mg/m3.
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