SO42- -TiO2 as a solid acid catalyst for O-acylation phenol |
Paper ID : 1303-UFGNSM-FULL |
Authors: |
Abstract: |
The use of solid acid catalysts such as acid treated clay, zeolities and metal oxides are gaining more attention in chemical reactions. Since liquid acids are highly corrosive, hazardous and polluting, recently, a number of organic synthesis have been conducted with solid acids such as SO42 / TiO2 . The acylation of phenol is one the most important processes in organic synthesis. In this paper, synthesis of sulfated titania nanocatalysts by the sol-gel method and their evalution in the o-acylation of phenol is reported. Sulfate loading by ammium sulfate increase the lewis acidity of TiO2 . This catalyst gives exellent yield and is an inexpensive, easilily separable, eco-friendly and recyclable. Characterization of the sulfated solids was performed by means of various techniques such as infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Energy-dispersive X-ray (EDX) methods. The o-acylation of phenol was fallowed by TLC and Gas chromatography (GC ) method. The yeild of reaction was obtained 99.5 % in 90 min, at room temperature, Catalyst dosage of 10 wt% with respect to phenol and phenol : acetic anhydride molar ratio equal to 1. |
Keywords: |
Solid acids, Sulfated Titania, Nanocatalyst, O-acylation phenol |
Status : Paper Accepted (Poster Presentation) |