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

1989-12-28

1991-05-14

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

C07C 268

Patent

active

050157973

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

REFERENCES:
patent: 3631120 (1971-12-01), Eberly, Jr. et al.
patent: 3763260 (1973-10-01), Pollitzer
patent: 3888938 (1975-06-01), Ogasawara et al.

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