Collect. Czech. Chem. Commun.
1999, 64, 138-148
https://doi.org/10.1135/cccc19990138
Cyclohexylation of Naphthalene Over USY Zeolites
Miroslav Michvocíka,*, Dušan Mraveca, Milan Hroneca, Agáta Smieškováb and Pavol Hudecb
a Department of Organic Technology, Faculty of Chemical Technology, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Slovak Republic
b Department of Fuels and Petrochemistry, Faculty of Chemical Technology, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Slovak Republic
Abstract
The influence of thermal stabilization of NH4-Y zeolite and modification of USY zeolites with solutions of hydrochloric acid on the cyclohexylation of naphthalene in the liquid phase was studied. Removal of the part of extra-framework aluminium from zeolite structure has a positive effect on both conversion of naphthalene and amount of dicyclohexylnaphthalenes formed. Modification of zeolites leads to an increase in conversion and selectivity of β-substitution in the naphthalene cyclohexylation.
Keywords: Alkylation; Cyclohexylation; Naphthalene; 2,6-Dialkylnaphthalenes; Zeolites; Heterogeneous catalysis.
