High Yield Alkylation of Phenol over Mesoporous Aluminum Silicate Molecular Sieves

A mesoporous aluminum silicate molecular sieve (MASM) with the Si/Al molar ratios of 25, 50, 100 and 150 was one pot synthesized with aluminum isopropoxide, tetraethylorthosilicate and cetyltrimethylammonium bromide by sol-gel method by using acetylacetone (acac) as chelating agent. XRD, N2 sorption, high resolution transmission electron microscopy and 27Al-NMR, investigation showed that a mesoporous molecular sieves with wormhole framework structure is formed. The synthesized MASM with the Si/Al molar ratio of 25 successfully catalyze the alkylation of phenol with 1-octene at 160 0C in liquid phase to the monoalkyl substituted product quantitatively.

Keywords:

Mesoporous aluminum silicate , Sol-gel , acetylacetone (acac) , alkylation , phenol , 1-octene