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    • 2. 发明授权
    • Cumene synthesis process using purified benzene and propylene feedstock streams
    • 使用纯化苯和丙烯原料流进行合成工艺
    • US06355851B1
    • 2002-03-12
    • US09711285
    • 2000-11-13
    • Albert H. WuJames T. Wei
    • Albert H. WuJames T. Wei
    • C07C266
    • C07C15/085C07C7/005C07C7/12C07C2529/70C07C15/04C07C11/06
    • A zeolite-catalyzed cumene synthesis process in which benzene and propylene feedstocks are pre-treated to remove catalyst poisons. The benzene feedstock is pre-treated under pressure by contact with a “hot” clay bed at a temperature of about 200 to 500° C., followed by distillation of the benzene feedstock to separate the benzene from the higher molecular weight materials formed from olefinic poisons during the hot clay treatment. The benzene feed is also subjected to a “cold” clay treatment wherein the benzene distillate is contacted with an ambient-temperature clay. The propylene feedstock is pre-treated by contact with an alumina to remove trace sodium compounds and moisture, a molecular sieve to remove moisture, and two modified aluminas to remove catalyst poisons. The pre-treated propylene and benzene feedstocks are then reacted in the presence of a zeolite catalyst to form cumene without causing rapid degradation of the catalyst's activity.
    • 沸石催化的枯烯合成方法,其中苯和丙烯原料被预处理以除去催化剂毒物。 苯原料在压力下通过在约200至500℃的温度下与“热”粘土床接触进行预处理,然后蒸馏苯原料以将苯与由烯烃形成的较高分子量材料分离 热粘土处理期间的毒药。 苯进料也经受“冷”粘土处理,其中苯馏分与环境温度粘土接触。 丙烯原料通过与氧化铝接触来预处理以除去痕量的钠化合物和水分,分子筛以除去水分,以及两种改性的氧化铝以除去催化剂毒物。 然后将预处理的丙烯和苯原料在沸石催化剂的存在下反应以形成异丙苯,而不会引起催化剂活性的快速降解。