Alkylation of organic aromatic compounds

Details Alkylation of organic aromatic compounds Alkylation of organic aromatic compounds

1994-05-23

1995-08-29

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

Same catalyst, solvent, or component thereof used in both...

585316, 585323, 585449, 203DIG6, C07C 100, C07C 264

Patent

active

054462231

ABSTRACT:
The aging rate of the catalyst in a process for the concurrent alkylation of aromatic with olefin and distillation of reaction components (reactants and products) in a distillation column reactor in a catalyst bed wherein the catalyst also serves as the distillation structure, is retarded by limiting the conversion of olefin in the catalyst bed to about 90 percent. A portion up to and including the entire unreacted aromatic and olefin in the overhead from the distillation column reactor are condensed and fed to a fixed bed alkylation reactor to substantially finish the conversion with a portion of the effluent from the fixed bed reactor recycled thereto to control the olefin content in the fixed bed reactor inlet to less than one volume percent, preferably less than 0.50 volume percent and thereby reduce the aging in that catalyst. A fixed bed transalkylation reactor is used to convert the polysubstituted alkylated aromatic products to mono-substituted alkylated aromatic products.

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