Process and Catalyst for the Transalkylation of Aromatics

A process for producing a monoalkylated aromatic compound from a polyalkylated aromatic compound, comprising the step of contacting an alkylatable aromatic compound with a polyalkylated aromatic compound under at least partial liquid phase conditions in the presence of a first transalkylation catalyst having a first catalytic activity, said first transalkylation catalyst comprising zeolite beta and phosphorous, the phosphorus content of said transalkylation catalyst is in the range of 0.001 wt. % to 10.0 wt. % of said first transalkylation catalyst, to provide a product which comprises a monoalkylated aromatic compound.