Transalkylation of alkylaromatics

Beck. J.S. Haag. W.O. Isomerization and Transalkylation of Alkylaromatics. In Handbook tf Heterogeneous Catalysis Ertl. G., Knozinger. H.. Weitkamp. J.. Eds. Wiley-VCH Weinheim, FRG. 1997 Vol. 5, 2136-2139. Chap. 4. GuisneL M. Procedes selectifs et propres de production d alkylaromatiques sur zeolithes. Actual. Chim.. Avril 1998.4. 9-15. 

Other Transformations of Alkylaromatics. An extensive amount of work has been done in the area of alkylaromatic isomerization-transalkylation, dealkylation, and related areas (7, 8,13, 32, 34, 35, 36, 41, 42, 60, 61, 62). Ward 67, 68, 69) also has conducted a series of very thorough studies into the relationship of activity in catalytic reactions, such as cumene dealkylation and alkylaromatic isomerization, and structural properties in synthetic faujasites, using IR spectroscopy among other... 

The reaction mechanism for a very strong one-electron donor centre in the dehydrogenation of alkylaromatic hydrocarbons is similar to that proposed by Krause for ethylbenzene dehydrogenation [reactions (5) and (6)]. The mechanism for n-propylbenzene transalkylation and cyclization on the radical pathway has been suggested. ... 

Isomerization and Transalkylation Reactions of Alkylaromatics over Zeolite Catalysts... 

The most important rearrangements in industrial aromatic chemistry are those of alkylaromatics (transalkylations), which occur under the influence of Lewis acids. They are particularly significant in the production of benzene from xylenes, and in optimizing the production of alkylaromatics. 

Dealkylation, transalkylation and isomerization of the alkylaromatics. occurring on the zeolite component. 

In transalkylation, one of the alkyl groups is transferred from one alkylaromatic molecule to another aromatic molecule. The mechanism of transalkylation was studied extensively in Friedel-Crafts chemistry. Though the reaction conditions are quite different from those of Friedel - Crafts catalysts, it seems quite probable that an essentially same mechanism is operative also in transalkylation with solid-acid catalysts. Thus, Kaeding et al. proposed the following mechanism for disproportionation of toluene over zeolites. ... 

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