Patent ID: 6090991
Filing Date: 2000-07-18
Classification: B01J,C07C

Abstract:
A method for the vapor-phase alkylation of an aromatic substrate comprising:providing an alkylation reaction zone having at least one catalyst bed containing a monoclinic silicalite catalyst having a weak acid site concentration of less than 50 micromoles per gram; andat least one other catalyst bed containing a second monoclinic silicalite catalyst, introducing feedstock of an aromatic substrate and an alkylating agent into the reaction zone;operating the alkylation reaction zone at temperature and pressure conditions in which the aromatic substrate is in a gaseous phase to cause gas-phase alkylation of the aromatic substrate in the presence of the monoclinic silicalite catalysts to produce an alkylation product; andwithdrawing the alkylation product from the reaction zone.