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    • 23. 发明授权
    • Process for making cyclohexylbenzene
    • 制备环己基苯的方法
    • US07579511B1
    • 2009-08-25
    • US12287655
    • 2008-10-10
    • Jihad Mohammed DakkaLorenzo Cophard DeCaulTeng Xu
    • Jihad Mohammed DakkaLorenzo Cophard DeCaulTeng Xu
    • C07C2/64C07C2/66
    • C07C2/74C07C2601/14C07C13/28
    • Provided is a process for making cyclohexylbenzene. The process includes the following steps: (a) contacting benzene and hydrogen in the presence of a first catalyst under hydroalkylation conditions sufficient to form a first effluent stream having cyclohexylbenzene, cyclohexane, methyl cyclopentane, and unreacted benzene; (b) supplying at least part of said first effluent stream to a first separation system to divide said first effluent stream part into a cyclohexane/methylcyclopentane-rich stream, a cyclohexane-rich stream, a benzene-rich stream, and a dicyclohexyl benzene-rich stream; (c) recycling at least part of the benzene-rich stream to the contacting step (a); (d) contacting the cyclohexane/methylcyclopentane-rich stream with a second catalyst that catalyzes dehydrogenation and exhibits low acidity under conditions sufficient to convert at least a portion of the cyclohexane to benzene and at least a portion of the methylcyclopentane to linear and/or branched paraffins to form a second effluent stream; and (e) recycling at least part of the second effluent stream to the contacting step (a).
    • 提供了制备环己基苯的方法。 该方法包括以下步骤:(a)在足以形成具有环己基苯,环己烷,甲基环戊烷和未反应苯的第一流出物流的加氢烷基化条件下,在第一催化剂存在下使苯和氢接触; (b)将至少部分所述第一流出物流供应到第一分离系统以将所述第一流出物流部分分解成富环己烷/甲基环戊烷流,富环己烷流,富含苯的流和二环己基苯 - 富流 (c)将至少部分富含苯的物流再循环至接触步骤(a); (d)使环己烷/甲基环戊烷流与催化脱氢的第二催化剂接触,并且在足以将至少一部分环己烷转化为苯和至少一部分甲基环戊烷的条件下呈现低酸度至线性和/或支化 石蜡形成第二流出物流; 和(e)将至少部分第二流出物流再循环到接触步骤(a)。