Chemistry Letters, Vol.34, No.10, 1446-1447, 2005
The t-butylation of phenol in supercritical carbon dioxide over H-Y zeolite. remarkable enhancement of catalytic performance for the formation of 2,4-di-t-butylphenol
Remarkable enhancement of the formation of 2,4-di-t-butylphenol was observed in the t-butylation of phenol over H-Y zeolite under supercritical CO2 medium. Supercritical CO2 renders active sites free for the catalysis by fast removal of coke-precursors.