Patent ID: 7692055
Filing Date: 2010-04-06
Classification: C07C,Y02P

Abstract:
1. A process for the transalkylation of a feedstock containing including dialkylbenzene having alkyl groups within the range of 8 to 16 carbon atoms with benzene to provide monoalkylbenzene comprising: a. providing benzene and said feedstock to at least one transalkylation zone wherein the molar ratio of benzene to total dialkylbenzene and monoalkylbenzene in the feedstock is at least about 20:1; b. maintaining said at least one transalkylation zone at transalkylation conditions comprising a catalytically effective amount of solid transalkylation catalyst to provide a transalkylation product in which at least about 20 mole percent of the dialkylbenzene in the portion of the feedstock provided to said reaction zone is converted to monoalkylbenzene, wherein the transalkylation catalyst is selected from the group consisting of include ZSM-4, ZSM-12, ZSM-20, ZSM-38, MCM-22, MCM-36, MCM-49, UZM-8 offretite, gmelinite, gottardite, and mixtures thereof; c. subjecting at least a portion of the transalkylation product to fractionation conditions to provide a lower boiling, benzene-rich fraction and a higher-boiling, alkyl substituted benzene-containing fraction; and d. passing at least a portion of the benzene-rich fraction to at least one transalkylation zone as at least a portion of the benzene to said reaction zone.