Yadav, Ganapati D. ; Asthana, Navinchandra S. ; Kamble, Valmik S. (2003) Friedel–Crafts benzoylation of p-xylene over clay supported catalysts: novelty of cesium substituted dodecatungstophosphoric acid on K-10 clay Applied Catalysis A: General, 240 (1-2). pp. 53-69. ISSN 0926-860X
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0926-860X(02)00418-0
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) Cs2.5H0.5PW12O40/K-10, 20% (w/w) ZnCl2/K-10 and K-10 itself and sulfated zirconia. Amongst these catalysts, 20% (w/w) Cs2.5H0.5PW12O40/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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Heterogeneous Catalysis; Dodecatungstophosphoric Acid; Cs-Substituted Dodecatungstophosphoric Acid; Clay; Zncl2; Sulfated Zirconia; p-Xylene; Benzoylation; 2,5-Dimethylbenzophenone; Benzoyl Chloride; Kinetics |
| ID Code: | 111837 |
| Deposited On: | 18 Sep 2017 12:23 |
| Last Modified: | 18 Sep 2017 12:23 |
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