Collect. Czech. Chem. Commun. 1992, 57, 896-900

Transalkylation of Benzene by the Fraction of Diisopropylbenzenes on ZSM-5 Zeolite Catalysts

Dušan Mraveca, Adrián Schnierera, Denisa Riečanováa, Jiří Herainb and Vendelín Machoa

a Department of Organic Technology, Slovak Technical University, 812 37 Bratislava
b Department of Petroleum Technology and Petrochemistry, Slovak Technical University, 812 37 Bratislava


The possibility of transalkylation of benzene by diisopropylbenzenes present in residual fraction from the production of cumene was tested on H-ZSM-5 zeolite catalysts. In this work the influence of: (i) the molar ration SiO2/Al2O3 in zeolites, (ii) reaction temperature, (iii) WHSV and (iv) the molar ratio of benzene and diisopropylbenzenes in the feed on the conversion and selectivity of the reaction were studied. The best yield of cumene was obtained at a temperature of 225 °C and WHSV = 1 h-1, at molar ratio benzene/ΣDIPB = 4 on the H-ZSM-5 zeolite with molar ratio SiO2/Al2O3 = 20.