Method of continuous production of polyalkylbiphenyls

Details Method of continuous production of polyalkylbiphenyls Method of continuous production of polyalkylbiphenyls

2007-04-17

2007-04-17

Griffin, Walter D. (Department: 1764)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire cyclic molecules or entire...

C585S464000, C585S467000, C585S716000

Reexamination Certificate

active

10647592

ABSTRACT:
A method of continuously producing polyalkylbiphenyls involves reacting biphenyl and an olefin in the presence of a solid acid catalyst to obtain a reaction mixture containing monoalkylbiphenyls and dialkylbiphenyls, separating a fraction containing biphenyl and at least a part of the monoalkylbiphenyls, circulating the separated fraction to the reactor such that the ratio of biphenyls to monoalkylbiphenyls is designed to be 0.1 or more and is designed to be less than the soluability of biphenyl to monoalkylbiphenyl at a circulation temperature, and recovering polyalkylbiphenyls.

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