Vapour phase isopropylation of biphenyl over modified molecular sieve catalysts

摘要

The vapour phase isopropylation of biphenyl was carried over modified Y,SAPO and MCM-41 molecular sieves.The conversions of biphenyl were in the range of 31-77% and the selectivites of dialkylated biphenyl were 35-53%.The effect of various reaction parameters like reaction temperature,weight hourly space velocity,molar ratio were studied.The dialkylated products were more over MCM-41 catalysts and the ratio of (sum)monoalkylated/(sum)dialkylated in the products varied with the catalyst and time on.stream.