FREMGANGSMAATE VED ALKYLERING AV AROMATISKE FORBINDELSER TIL ALKYLERINGSPRODUKTER ANRIKET PAA PARASUBSTITUERTE ISOMERE, OG KATALYSATORER FOR ANVENDELSE DERI

摘要

Aromatic compounds, such as benzene or biphenyl, are alkylated with an alkylating agent, such as propylene, in the presence of an acidic mordenite zeolite catalyst under conditions sufficient to produce a mixture of substituted polycyclic aromatic compounds enriched in the para alkylated isomers, such as p-diisopropyl-benzene or p,p min -di(isopropyl)biphenyl, respectively. The novel acidic mordenite catalyst is characterized by its silica/alumina molar ratio, its porosity, and Symmetry Index. The p,p min -disubstituted isomers of aromatic compounds are useful as monomers in the preparation of thermotropic, liquid crystal polymers.