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    • 69. 发明公开
    • Dehydrocyclization process with downstream dimethylbutane removal
    • 脱水仙人掌on ender ender。。。。。。。。。。。。。
    • EP1010745A1
    • 2000-06-21
    • EP98310451.4
    • 1998-12-18
    • Chevron Chemical Company LLC
    • Witte, David H.
    • C10G61/02C07C5/41
    • C10G61/02C07C5/417C07C2529/22C07C2529/62C07C2529/74
    • In the present invention, dimethylbutanes are removed from the raffinate component of the feed to a dehydrocyclization process. Thus, according to a preferred embodiment, a process is provided for producing aromatics by the following steps:

      (a) contacting fresh paraffins rich feed hydrocarbons, containing 0.1 to 20.0 wt. % dimethylbutanes with a highly selective dehydrocyclization catalyst in a reaction zone, under dehydrocyclization reaction conditions, to convert paraffins to aromatics and obtain an aromatics rich effluent;
      (b) separating aromatics from the effluent to obtain an aromatics lean raffinate;
      (c) removing dimethylbutanes from the raffinate to obtain a raffinate of reduced dimethylbutane content; and
      (d) recycling the raffinate of reduced dimethylbutane content to the reaction zone.

      Preferably, the dehydrocyclization catalyst used is a nonacidic, monofunctional catalyst. Platinum on L zeolite is a particularly preferred highly selective dehydrocyclization catalyst for use in the process.
    • 在本发明中,将二甲基丁烷从进料的萃余液组分中除去脱氢环化过程。 因此,根据优选的实施方案,提供了通过以下步骤生产芳族化合物的方法:(a)使含有0.1至20.0重量% %二甲基丁烷与高选择性脱氢环化催化剂在反应区内,在脱氢环化反应条件下,将烷烃转化为芳族化合物,并获得富含芳烃的流出物; (b)从流出物中分离出芳族化合物以获得芳烃贫残余物; (c)从萃余液中除去二甲基丁烷以获得还原的二甲基丁烷含量的萃余液; 和(d)将还原的二甲基丁烷含量的残液回收到反应区。 优选地,所用的脱氢环化催化剂是非酸性单官能催化剂。 L沸石上的铂是用于该方法的特别优选的高选择性脱氢环化催化剂。