PROCESS FOR ISOMERIZATION OF ALKYLAROMATIC HYDROCARBONS

摘要

PURPOSE: A method for differentiating an ortho- or meta-xylene to a para xylene and a method for eliminating an ethylbenzene from a C8 aromatic are ne compound stream by using a zeolite combined zeolite catalyst are provided. CONSTITUTION: A process for isomerizing a feed containing alkylaromatic hydrocarbons, e.g., monocyclic alkylaromatic hydrocarbons and/or bicyclic alkylaromatic hydrocarbons. The process is carried out by contacting the feed under conversion conditions with a zeolite bound zeolite catalyst which comprises first crystals of an intermediate pore size first zeolite and a binder which comprises second crystals of a second zeolite. The process finds particular application in isomerizing a feed containing ethylbenzene and less than equilibrium amounts of xylene with ethylbenzene and can produce a product containing above equilibrium quantities of para-xylene with low aromatics ring loss and xylene loss.