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Selective Formation of p-Cresol by Alkylation of Phenol with Methanol Over Y Type Zeolite

1980; Elsevier BV; Linguagem: Inglês

10.1016/s0167-2991(08)64870-3

2542-6613

Seitarô Namba, Tatsuaki Yashima, Yasushi Itaba, Nobuyoshi Hara,

Catalysis for Biomass Conversion

This chapter presents the selective formation of p-cresol by alkylation of phenol with methanol over Y type zeolite. In the alkylation of phenol with methanol over H–Y zeolite catalysts, the moderate acid sites (−3.0 ≥ H0 > −8.2) on H–Y zeolites are advantageous to produce p-cresol selectively. The weaker acid sites are effective in producing anisol and the stronger acid sites are helpful for the secondary reactions. K+ in H–Y zeolites is more effective for the selective formation of p-cresol than Na+ in H–Y zeolites. The yield of p-cresol is 22%, the selectivity for p-cresol based on phenol converted is 35%, and the fraction of p-isomer in cresols is 61% on the H–K–Y zeolite. Anisol is not a main intermediate in the formation of cresol by the alkylation of phenol with methanol over H–Y zeolite catalysts.