Conclusions
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1.
The Bi, Sn, Sb, and In oxides are inactive as catalysts for the aromatization of isobutylene. The Zn, Ti, Th, and V oxides are slightly active in this reaction, but in the case of the Ti and Zn oxides the liquid reaction products contain mainly p-xylene (respectively 80.8 and 63.2%).
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2.
The catalysts, obtained by depositing V2O3 on Al2O5, Al2O3(F), and SiO2, have a high activity, in which connection the main reaction products are xylenes, the amount of which in the catalyzates is respectively 76.2, 75.4, and 93.4%. The ratio between the individual reaction products and, in particular, between the C8 aromatic hydrocarbons, depends on the V2O5 concentration in the catalyst.
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3.
The relative amount of the isomeric xylenes and ethylbenzene in the reaction products is apparently due to the isomerization of the isobutylene dimer, which is formed in the first step of the aromatization reaction.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1318–1323, June, 1980.
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Kondrat'ev, D.A., Dergachev, A.A., Bondarenko, T.N. et al. Catalytic aromatization of C2–C4 olefins. Russ Chem Bull 29, 939–944 (1980). https://doi.org/10.1007/BF00958812
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DOI: https://doi.org/10.1007/BF00958812