G. Yadav, Navinchandra S. Asthana, V. S. Kamble
Feb 10, 2003
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0
Influential Citations
43
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Journal
Applied Catalysis A-general
Abstract
Abstract 2,5-Dimethylbenzophenone is used extensively as a UV light stabilizer in plastics, cosmetics and films and produced by the benzoylation of p -xylene using homogeneous catalysts which pose several problems. The benzoylation of p -xylene with benzoyl chloride was carried out in a batch reactor using clay supported catalysts such as 20% (w/w) dodecatungstophosphoric (DTP) acid/K-10, 20% (w/w) Cs 2.5 H 0.5 PW 12 O 40 /K-10, 20% (w/w) ZnCl 2 /K-10 and K-10 itself and sulfated zirconia. Amongst these catalysts, 20% (w/w) Cs 2.5 H 0.5 PW 12 O 40 /K-10 was found to be a better catalyst which could be reused without any further chemical treatment eliminating the effluent disposal problem. This catalyst was fully characterized. The reaction obeys the Eley–Rideal type of mechanism with a weak adsorption of the benzoylating species.