Produção Nacional
Revisado por pares
Benzylation of toluene and anisole by benzyl alcohol catalysed by niobic acid
1996; Elsevier BV; Volume: 28; Issue: 1-2 Linguagem: Inglês
10.1016/0920-5861(95)00214-6
ISSN1873-4308
AutoresMarcelo Alonso Morais, Epifanio Torres, L.M.P.M. Carmo, Nídia Maria Ribeiro Pastura, Wilma A. Gonzalez, A. C. B. Dos Santos, Elizabeth R. Lachter,
Tópico(s)Catalysis and Oxidation Reactions
ResumoThe catalytic activities of commercial niobic acid, niobium pentoxide prepared in laboratory and niobic acid treated with phosphoric acid, were evaluated in the benzylation of toluene and anisole with benzyl alcohol, in liquid phase. The best results were achieved with niobic acid treated with phosphoric acid (pretreatment at 423 K), the conversion of benzyl alcohol was 99.2% with anisole and the main product was the benzylation product. The acidity of these solids has been determined by infrared spectrometry using pyridine as a probe molecule. The ratio of Lewis acidity/Brønsted acidity was higher for niobic acid treated with phosphoric acid.
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