Minimizing diphenylethane formation in alkylation of benzene by

Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By condensation of entire molecules or entire hydrocarbyl...

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585446, C07C 254

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059627590

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 treating a non-templated zeolite beta at thermal oxidation conditions. The precursor zeolite beta contains at least 0.5% carbon which represents a combination of coke and high molecular organic compounds which are not removed by an extended benzene wash at about 200-250.degree. C. The improvement leads to a product containing less than 0.3 weight percent 1,1-diphenylethane relative to ethylbenzene.

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