Method of continuous production of polyalkylbiphenyls
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United States of America Patent
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Apr 17, 2007
Grant Date -
Apr 15, 2004
app pub date -
Aug 26, 2003
filing date -
Aug 30, 2002
priority date (Note) -
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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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