Alkylation of polycyclic aromatic compounds to alkylates enriche

Details Alkylation of polycyclic aromatic compounds to alkylates enriche Alkylation of polycyclic aromatic compounds to alkylates enriche

1987-11-23

1990-01-02

Gray, Bruce

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568 27, 568 29, 568 33, 568 34, 568 36, 568 37, 568 53, 568 57, 568 58, 568 68, 568707, 585452, 585453, C07C 4118

Patent

active

048914487

ABSTRACT:
Polycyclic aromatic compounds, such as 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,p'-di(isopropyl)biphenyl. The novel acidic mordenite catalyst is characterized by its silica/alumina molar ratio, its porosity, and a Symmetry Index. The p,p'-disubstituted isomers of polycyclic aromatic compounds are useful as monomers in the preparation of thermotropic, liquid crystal polymers.

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