| 摘要 |
PURPOSE:To profitably obtain a 4-alkyl-4'-diethyl biphenyl useful as a raw material for heat-resistant high molecular materials from an industrially inexpensive polyethyltoluene mixture in a high selectivity and in a high production efficiency. CONSTITUTION:When a 4-alkyl-4'-diethylbiphenyl is produced by subjecting a 4-alkylbiphenyl and a profitable raw material, plyethyltoluene compounds (EnT) mixture, to a transalkylation(TA) reaction in the presence of an acid catalyst, the EnT mixture containing diethyltoluene and triethyltoluene and having an average ethyl group number of 1.1-3.9 per benzene ring is employed as the TA agent to obtain the objective compound in a good selectivity. Especially when the acid catalyst is Friedel crafts catalyst, the objective compound is obtained in the substantially same high selectivity as by conventional methods and in a far higher production efficiency than by the conventional methods. Since other components excluding the objective compound in the reaction products can again used, all amounts of the raw materials can be converted into the objective compound. |
