利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.02 秒)

    Aromatics transalkylation to ethylbenzene and xylenes
    5.
    发明申请
    Aromatics transalkylation to ethylbenzene and xylenes 审中-公开

    公开(公告)号：US20050215839A1

    公开(公告)日：2005-09-29

    申请号：US11137291

    申请日：2005-05-25

    申请人： Paula Bogdan ,  Robert James ,  Gregory Maher

    发明人： Paula Bogdan ,  Robert James ,  Gregory Maher

    IPC分类号： C07C5/22 ,  C07C5/27 ,  C07C6/12

    CPC分类号： C07C6/126 ,  C07C15/073 ,  C07C15/08

    摘要： The use of transalkylation catalysts to react heavy aromatic compounds of carbon number nine (and heavier carbon numbers) with benzene to form carbon number eight aromatics is disclosed. The catalyst system preserves ethyl-group species on the heavier aromatics that are otherwise de-ethylated over most gas-phase transalkylation catalysts to form undesired ethane gas with benzene or toluene. The catalyst system also promotes methyl-group species transalkylation at selected conditions. Thus, by using the transalkylation system, a greater yield of para-xylene or other carbon number eight aromatics may be achieved overall within an integrated aromatics complex.

    Process and bimetallic catalyst for C8 alkylaromatic isomerization
    8.
    发明申请
    Process and bimetallic catalyst for C8 alkylaromatic isomerization 审中-公开
    C8烷基芳族异构化的工艺和双金属催化剂

    公开(公告)号：US20050143615A1

    公开(公告)日：2005-06-30

    申请号：US10749179

    申请日：2003-12-30

    申请人： Paula Bogdan ,  John Bauer ,  Robert Larson

    发明人： Paula Bogdan ,  John Bauer ,  Robert Larson

    IPC分类号： C07C5/22 ,  C07C5/27

    CPC分类号： C07C5/2737 ,  C07C5/2775 ,  Y02P20/52 ,  C07C15/08

    摘要： A process for isomerizing ethylbenzene into xylenes such as para-xylene using a bimetallic zeolitic catalyst system based on MTW-type zeolite is disclosed. Preferably the two metals are platinum and tin. The invention obtains a stable and improved yield of xylenes such as para-xylene without excess benzene production by dealkylation. The zeolitic silica-to-alumina ratio ranges from 20 to 45. Use of MTW substantially free of mordenite improves yields and integrated aromatics complex economics by reducing undesirable aromatic ring-loss reactions.

    摘要翻译： 公开了使用基于MTW型沸石的双金属沸石催化剂体系将乙苯异构化为二甲苯（如对二甲苯）的方法。 优选地，两种金属是铂和锡。 本发明通过脱烷基化获得稳定且提高的二甲苯产率，如对二甲苯，而不产生过量的苯。 沸石二氧化硅与氧化铝的比例范围为20至45.使用基本上不含丝光沸石的MTW通过减少不期望的芳族环损失反应来提高产率和综合芳族化合物复合经济性。