Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By alkyl or aryl transfer between molecules – e.g.,...
Patent
1998-12-17
2000-09-05
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By alkyl or aryl transfer between molecules, e.g.,...
585470, C07C 522
Patent
active
061145920
ABSTRACT:
An improved process combination is disclosed for the selective disproportionation of toluene. The combination comprises selective hydrogenation of a toluene feedstock followed by disproportionation using a zeolitic catalyst which is oil-dropped in an aluminum phosphate binder to achieve a high yield of paraxylene. Optionally, the catalyst is selectively precoked prior to toluene disproportionation. The catalyst and process provide improved selectivity for the production of paraxylene.
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Boldingh Edwin P.
Gajda Gregory J.
Conser Richard E.
Dang Thuan D.
Griffin Walter D.
Spears Jr. John F.
Tolomei John G.
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