CATALYSTS WITH LOW CONCENTRATION OF WEAK ACID SITED AND METHOD FOR ALKYLATION OF AROMATICS

摘要

Ethylbenzene is produced by alkylation over monoclinic silicalite catalysts having a weak acid site concentration of less than 50 micromoles per gram. A feedstock containing benzene and ethylene is applied to 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. The alkylation reaction zone is operated at temperature and pressure conditions in which the benzene is in a gaseous phase to cause gas-phase alkylation of the aromatic substrate in the presenc e of the silicalite catalysts to produce an alkylation product. The alkylation produc t is then withdrawn from the reaction zone for separation and recovery.