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Title: Equilibrium of the simultaneous etherification ofisobutene and isoamylenes with ethanol inliquid-phase
Author: Soto López, Rodrigo
Fité Piquer, Carles
Ramírez Rangel, Eliana
Bringue Tomás, Roger
Cunill García, Fidel
Keywords: Equilibri químic
Energies renovables
Contaminació atmosfèrica
Chemical equilibrium
Renewable energy sources
Atmospheric pollution
Issue Date: 23-Nov-2013
Publisher: Elsevier B.V.
Abstract: The simultaneous etherification of isobutene and isoamylenes with ethanol has been studied using macroreticu-lar acid ion-exchange resins as catalyst. Most of the experiments were carried out over Amberlyst-35. In addition,Amberlyst-15 and Purolite CT-275 were also tested. Chemical equilibrium of four chemical reactions was studied:ethyl tert-butyl ether formation, tert-amyl ethyl ether formation from isoamylenes (2-methyl-1-butene and 2-methyl-2-butene) and isomerization reaction between both isoamylenes. Equilibrium data were obtained in a batchwisestirred tank reactor operated at 2.0 MPa and within the temperature range from 323 to 353 K. Experimental molarstandard enthalpy and entropy changes of reaction were determined for each reaction. From these data, the molarenthalpy change of formation of ethyl tert-butyl ether and tert-amyl ethyl ether were estimated. Besides, the chemical equilibrium between both diisobutene dimers, 2,4,4-trimethyl-1-pentene and 2,4,4-trimethyl-2-pentene, wasevaluated. A good agreement between thermodynamic results for the simultaneous etherification carried out in thiswork and those obtained for the isolated ethyl tert-butyl ether and tert-amyl ethyl ether systems was obtained.
Note: Versió postprint del document publicat a:
It is part of: Chemical Engineering Research & Design, 2013, vol. 92, num. 4, p. 644-656
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ISSN: 0263-8762
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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