Reaction Kinetics and Catalysis Letters, Vol.83, No.2, 329-335, 2004
Deactivation of external acid sites of H-mordenite by silica-modification in the isopropylation of biphenyl
Although extensive isomerization of 4,4'-diisopropylbiphenyl (4,4'-DIPB) occurred at 300degreesC over H-mordenite, high selectivity for 4,4'-DIPB among DIPB isomers was observed over silica-modified H-mordenite. This is due to the prevention of the isomerization of 4,4'-DIPB by the deactivation of external acid sites.