Role of Lewis and Brønsted acid sites in resorcinol tert-butylation over heteropolyacid-based catalysts

Investigating Keggin heteropolyacid embedded in SiO₂, TiO₂ and ZrO₂ showed that both Brønsted (B) and Lewis (L) acid sites are needed to achieve the alkylation of resorcinol with MTBE. An optimum B to L site ratio allows maximizing the performance.