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    Method of preparing 4,4'-diisopropylbiphenyl
    15.
    发明申请
    Method of preparing 4,4'-diisopropylbiphenyl 审中-公开
    制备4,4'-二异丙基联苯的方法

    公开(公告)号：US20050137436A1

    公开(公告)日：2005-06-23

    申请号：US10741324

    申请日：2003-12-18

    申请人： Olga Ponomareva ,  Andrei Kuznetsov ,  Valentina Yushchenko ,  Andrei Smirnov ,  Elena Knyazeva ,  Irina Moskovskaya ,  Irina Ivanova ,  Grigorii Soloveichik

    发明人： Olga Ponomareva ,  Andrei Kuznetsov ,  Valentina Yushchenko ,  Andrei Smirnov ,  Elena Knyazeva ,  Irina Moskovskaya ,  Irina Ivanova ,  Grigorii Soloveichik

    IPC分类号： C07C2/66 ,  B01J29/00 ,  C07B61/00 ,  C07C2/12 ,  C07C6/12 ,  C07C15/14

    CPC分类号： C07C2/66 ,  C07C2529/18 ,  C07C15/14

    摘要： A continuous flow process has been discovered for the highly selective isopropylation of biphenyl to 4,4′-diisopropylbiphenyl. Thus biphenyl and propene in decalin are passed through a solid catalyst bed contained in a flow reactor at moderate temperature (220° C.) and pressure (10-30 atm) together with a continuous stream of nitrogen. The catalyst is an acidic zeolite catalyst having a molar ratio of SiO2 to Al2O3 in a range between about 20 to 1 and about 500 to 1. Optimal catalytic performance is achieved when 35% or more of the active sites in the catalyst have an activation energy of ammonia desorption in a range between about 145 kJ/mol and about 170 kJ/mol. Additional enhancements of catalyst performance can be achieved by pretreating the acidic zeolite catalyst with a volatile basic agent prior to the alkylation reaction.

    摘要翻译： 已经发现连续流动方法用于联苯至4,4'-二异丙基联苯的高选择性异丙基化。 因此，萘烷中的联苯和丙烯与中等温度（220℃）和压力（10-30atm）的流动反应器中所含的固体催化剂床和连续的氮气流一起通过。 所述催化剂是一种酸性沸石催化剂，其摩尔比为SiO 2至约2:1至约2:1至约2.0:1 500至1.当催化剂中35％或更多的活性位点具有在约145kJ / mol至约170kJ / mol之间范围内的氨解吸活化能时，实现最佳催化性能。 可以通过在烷基化反应之前用挥发性碱性试剂预处理酸性沸石催化剂来实现催化剂性能的进一步增强。