Minimizing diphenylethane formation in alkylation of benzene by

Details Minimizing diphenylethane formation in alkylation of benzene by Minimizing diphenylethane formation in alkylation of benzene by

1999-06-21

2000-11-28

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

585446, C07C 266

Patent

active

06153806&

ABSTRACT:
Reduction of the amount of 1,1-diphenylethane and heavier polyalkylated benzenes produced in the formation of ethylbenzene by alkylation of benzene with ethylene can be effected by reducing the number of hydride transfer active sites on a zeolite beta. One way of producing this "site-modified" beta is to take a parent or precursor zeolite beta that has at least 0.5% carbon on it and treat it under oxidation conditions at a temperature of about 450.degree. C. to about 750.degree. C. The use of such a catalyst gives a product containing less than 0.3 wt. % 1,1-diphenylethane relative to ethylbenzene.

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