Open AccessLiquid Phase Benzylation of Toluene over Modified Titania Catalysts
Author(s) -
K.R. Sunaja Devi,
S. Sugunan
Publication year - 2012
Publication title -
mapana journal of sciences
Language(s) - English
Resource type - Journals
ISSN - 0975-3303
DOI - 10.12723/mjs.21.3
Subject(s) - toluene , anatase , catalysis , calcination , desorption , benzyl chloride , crystallite , thermogravimetric analysis , montmorillonite , inorganic chemistry , adsorption , chemistry , phase (matter) , materials science , nuclear chemistry , organic chemistry , photocatalysis , crystallography
Titania, sulfated titania and a series of iron loaded sulfated titania catalyst with different iron loadings (39 %) are prepared by sol-gel method and calcined at 500°C. Anatase is found to be the active phase with crystallite size in the nano range. All the prepared catalysts are found to be stable up to 700°C. Acidity is measured using spectrophotometric monitoring of adsorption of perylene, thermogravimetric desorption of 2,6-dimethylpyridine and temperature programmed desorption of ammonia. The activities of the catalysts were tested for liquid phase Friedel-Crafts benzylation of toluene with benzyl chloride. It has been concluded that Lewis acid sites are responsible for the reaction.