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Mechanism of the Products Formation in the Vapor Phase Ammoxidation Reaction of 4-Phenyl-o-Xylene
Institute of Catalysis and Inorganic Chemistry Named after M. Nagiyev, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
Institute of Catalysis and Inorganic Chemistry Named after M. Nagiyev, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
Institute of Catalysis and Inorganic Chemistry Named after M. Nagiyev, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
- 1 Institute of Catalysis and Inorganic Chemistry Named after M. Nagiyev, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
- 2 Institute of Catalysis and Inorganic Chemistry Named after M. Nagiyev, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
- 3 Institute of Catalysis and Inorganic Chemistry Named after M. Nagiyev, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
Advances in Chemical Engineering and Science·Volume 05 (2015)·Pages 430–440·Published 25 August 2015·DOI10.4236/aces.2015.54044
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Abstract
On the basis of kinetic data of 4-phenyl-o-xylene and 4-phenyl-o-tolunitrile ammoxidation, formation mechanism of the products was analyzed and generalized. It has been shown that dissociative adsorption of a substrate and mononitrile occurs on the centers with high heats of adsorption of oxygen and as a consequence, completely covered with it, competitive adsorption of NH 3 and O 2 occurs on the centers with low heats of adsorption of the latter; mononitrile and dinitrile are formed correspondingly from adsorbed fragments of both substrate and NH 3 , and tolunitrile and NH 3 ; surface interaction of adsorbed fragments of substrate and O 2 with low heat of adsorption gives imide and CO 2 ; hydrolysis of dinitrile into imide occurs on centers completely covered with ammonia; imide decarboxylation occurs on the centers covered with it; oxidative destruction of tolunitrile occurs on centers covered with substrate and mononitrile.
KeywordsAmmonolysis4-Phenyl-o-XyleneKineticsMechanism
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