Tertiary butylation of phenol over mesoporous H-FeMCM-41

Trivalent-iron-substituted mesoporous molecular sieve catalysts (FeMCM-41) were synthesized hydrothermally and characterized systematically by various analytical and spectroscopic techniques. Temperature-programmed desorption studies of ammonia of the protonated catalyst (H-FeMCM-41) indicate a broa d distribution of the acid sites. Vapour-phase alkylation of phenol with t- butyl alcohol (2-methyl-2-propanol) was carried out over this solid acid ca talyst and p-t-butyl phenol was obtained as the major product with high sel ectivity.