Epoxidation of 2-butene from raffinate 2 feedstock / Torsten Berndt in Industrial & engineering chemistry research, Vol. 49 N° 8 (Avril 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp 3957–3960 Titre : Epoxidation of 2-butene from raffinate 2 feedstock Type de document : texte imprimé Auteurs : Torsten Berndt, Auteur Année de publication : 2010 Article en page(s) : pp 3957–3960 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Epoxidation Butene Raffinate Feedstock Résumé : The gas-phase epoxidation of 2-butene (trans or cis) has been conducted in a flow-through reactor at a pressure of 0.5 bar and a temperature of 325 °C using a N2/O2 mixture as the carrier gas. The primary oxidizing agent in the feed gas is ozone. Selectivity to epoxide (trans- and cis-epoxide in total) of about 90% is observed. Investigations using mixtures of trans-2-butene with 1-butene or n-butane revealed a clearly preferred reaction of trans-2-butene. Kinetic analysis of the overall process yielded ratios for the corresponding rate coefficients of k(trans-2-butene)/k(1-butene) = 5.4−7.2 and k(trans-2-butene)/k(n-butane) 67. A few experiments showed a similar behavior for cis-2-butene. Using raffinate 2 (1-butene, 2-butene, n-butane, and iso-butane) as the feedstock for epoxidation, a selective production of 2-butene oxide (trans/cis mixture) is feasible. Additions of methane (1.7−12.5 vol %), H2O vapor (1.7−4.2 vol %), or CO2 (1.7−25 vol %) in the carrier gas do not influence the epoxidation reaction. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901349n [article] Epoxidation of 2-butene from raffinate 2 feedstock [texte imprimé] / Torsten Berndt, Auteur . - 2010 . - pp 3957–3960. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp 3957–3960 Mots-clés : Epoxidation Butene Raffinate Feedstock Résumé : The gas-phase epoxidation of 2-butene (trans or cis) has been conducted in a flow-through reactor at a pressure of 0.5 bar and a temperature of 325 °C using a N2/O2 mixture as the carrier gas. The primary oxidizing agent in the feed gas is ozone. Selectivity to epoxide (trans- and cis-epoxide in total) of about 90% is observed. Investigations using mixtures of trans-2-butene with 1-butene or n-butane revealed a clearly preferred reaction of trans-2-butene. Kinetic analysis of the overall process yielded ratios for the corresponding rate coefficients of k(trans-2-butene)/k(1-butene) = 5.4−7.2 and k(trans-2-butene)/k(n-butane) 67. A few experiments showed a similar behavior for cis-2-butene. Using raffinate 2 (1-butene, 2-butene, n-butane, and iso-butane) as the feedstock for epoxidation, a selective production of 2-butene oxide (trans/cis mixture) is feasible. Additions of methane (1.7−12.5 vol %), H2O vapor (1.7−4.2 vol %), or CO2 (1.7−25 vol %) in the carrier gas do not influence the epoxidation reaction. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901349n

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