Patent ID: 6313362
Filing Date: 2001-11-06
Classification: C07C

Abstract:
An aromatic alkylation process comprising:contacting at least one alkylatable aromatic compound with at least one alkylating agent under sufficient reaction conditions and in the presence of a catalyst to provide an alkylated aromatic product comprising at least one monoalkylated aromatic compound and at least one polyalkylated aromatic compound; andcontacting at least a portion of said product with a purification medium comprising a molecular sieve catalyst selected from MCM-22, MCM-36, MCM-49, MCM-56 and combinations thereof in a liquid phase pre-reaction step to remove impurities and form a purified stream comprising said at least one polyalkylated aromatic compound; andcontacting said purified stream with at least one alkylatable aromatic compound under liquid phase conditions in a transalkylation section in the presence of a catalyst to convert at least a portion of said at least one polyalkylated aromatic compound to a monoalkylated aromatic compound.