BENZYLATION OF TOLUENE AND ANISOLE BY BENZYL ALCOHOL CATALYZED BY NIOBIC ACID

Authors
MORAIS M TORRES EF CARMO LMPM PASTURA NMR GONZALEZ WA DOSSANTOS ACB LACHTER ER
Citation
M. Morais et al., BENZYLATION OF TOLUENE AND ANISOLE BY BENZYL ALCOHOL CATALYZED BY NIOBIC ACID, Catalysis today, 28(1-2), 1996, pp. 17-21
Citations number
16
Categorie Soggetti
Engineering, Chemical","Chemistry Applied","Chemistry Physical
Journal title
Catalysis today → ACNP
ISSN journal
09205861
Volume
28
Issue
1-2
Year of publication
1996
Pages
17 - 21
Database
ISI
SICI code
0920-5861(1996)28:1-2<17:BOTAAB>2.0.ZU;2-W
Abstract
The catalytic activities of commercial niobic acid, niobium pentoxide prepared in laboratory and niobic acid treated with phosphoric acid, w ere evaluated in the benzylation of toluene and anisole with benzyl al cohol, in liquid phase. The best results were achieved with niobic aci d 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/Bronsted acidity was higher for niobic acid treated with phosphoric acid.