Modifizierter Zeolit-Alkylierungskatalysator und Gebrauchsverfahren.

摘要

A metal modified alkylation catalyst comprising a lanthanum/beta zeolite is provided, The lanthanum/beta zeolite has a surface area based upon the crystalline structure of the lanthanum/beta zeolite of at least 600m<2>/g and a sodium content in the crystalline structure of the lanthanum/beta zeolite of less than 0,04 weight percent Na2O. A process for the preparation and utilization of the lanthanum/beta zeolite is also provided. The process is particularly useful for the alkylation of an aromatic substrate in the liquid phase by a low molecular weight alkylating agent. A specific process involves the alkylation of benzene with ethylene to produce ethylbenzene. The process is carried out in the liquid phase and at alkylation condition under which the xylene make, based upon the amount of ethylbenzene produced, is no more than 0.03 weight percent.