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ALKYLATION OF POLYCYCLIC AROMATIC COMPOUNDS WITH THE FORMATION OF ALKYLATES ENRICHED WITH THE PARA-SUBSTITUTED ISOMERS
ALKYLATION OF POLYCYCLIC AROMATIC COMPOUNDS WITH THE FORMATION OF ALKYLATES ENRICHED WITH THE PARA-SUBSTITUTED ISOMERS
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机译:多环芳族化合物的烷基化与富含对位取代异构体的烷基化物的形成
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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.
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