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    Method and apparatus for the improved purification of vinyl aromatic compounds
    1.
    发明公开
    Method and apparatus for the improved purification of vinyl aromatic compounds 审中-公开
    Methode und Apparatfürdie Reinigung von vinylaromatischen Verbindungen

    公开(公告)号：EP1129753A1

    公开(公告)日：2001-09-05

    申请号：EP01200677.1

    申请日：2001-02-22

    申请人： FINA TECHNOLOGY, INC.

    发明人： Ledoux, Marcus E. ,  Prince, Kelli E. ,  Jacobsen, Adrian M. ,  Braud, Larry P.

    IPC分类号： B01D3/32 ,  C07C7/20

    CPC分类号： B01D3/322 ,  B01D3/141 ,  C07C7/05 ,  Y10S203/09 ,  C07C15/46

    摘要： The present invention is directed to an apparatus and method for the distillation of a readily polymerizable vinyl aromatic compound employing a polymerization inhibitor. The vinyl aromatic compound is subjected to distillation in at least one fractionation column having at least one reboiler for maintaining the bottoms of said column at a proper temperature. The reboiler comprises a heating section and a vapor phase section. The bottoms fraction from the fractionation column is cycled to the reboiler and subjected to heat to vaporize at least a portion of the bottoms fraction to form a vapor phase in the vapor section. A slip stream of the bottoms fraction is introduced to the vapor phase section of the reboiler. The slipstream contains polymerization inhibitor that had been added to the process at the fractionation column. The invention reduces fouling at the reboilers. The slipstream is optionally introduced to the reboiler using one or more spray nozzles. The polymerization inhibitor is added to the fractionation column in sufficient amounts to maintain a concentration of at least 400 parts per million by weight in the bottoms fraction.

    摘要翻译： 本发明涉及一种使用聚合抑制剂蒸馏容易聚合的乙烯基芳族化合物的装置和方法。 乙烯基芳族化合物在至少一个具有至少一个再沸器的分馏塔中进行蒸馏，用于将塔的底部保持在适当的温度。 再沸器包括加热段和气相段。 来自分馏塔的塔底馏分循环到再沸器并进行加热以蒸发至少一部分塔底馏分以在蒸汽段中形成气相。 底部馏分的滑流引入再沸器的气相部分。 滑流包含已经在分馏塔中加入到该方法中的阻聚剂。 本发明减少了再沸器的结垢。 滑流可选地使用一个或多个喷嘴引入再沸器。 将聚合抑制剂以足够的量加入到分馏塔中，以保持底部馏分中至少400重量ppm的浓度。

    Catalytic reactor for dehydrogenation of ethylbenzene to styrene
    2.
    发明公开
    Catalytic reactor for dehydrogenation of ethylbenzene to styrene 有权
    Katalytischer Reaktor zur Dehydrierung von Ethylbenzol zu Styrol

    公开(公告)号：EP1142631A1

    公开(公告)日：2001-10-10

    申请号：EP01200679.7

    申请日：2001-02-22

    申请人： FINA TECHNOLOGY, INC.

    发明人： Prince, Kelli E. ,  Ledoux, Marcus E. ,  Tudor, Honn ,  Gremillion, Mark

    IPC分类号： B01J8/02 ,  C07C5/333 ,  C07C15/46

    CPC分类号： B01J8/0214 ,  B01J2208/00707 ,  B01J2208/00725 ,  B01J2208/00849 ,  B01J2219/00024 ,  C07C5/333 ,  Y10S585/921 ,  Y10S585/922 ,  C07C15/46

    摘要： The present invention discloses a process and apparatus for improving the catalyst life and efficiency in a gas flow catalyst bed reactor assembly. The reactor comprises an outer reaction vessel (10), an inner displacement cylinder (12), and an annular catalyst bed (18) surrounding the displacement cylinder (12) having a top half and a bottom half. Fluid flow improvement is achieved by adding at least one baffle (30,31,32) to the top half of the displacement cylinder (12) to improve uniformity of fluid flow in the reaction vessel (10) and across the catalyst bed (18). Also disclosed is a process for improving fluid flow uniformity in a gas phase reactor comprising an outer reaction vessel (10), an inner displacement cylinder (12) having a top half and a bottom half and a reaction outer surface and an inert inner space, and an annular catalyst bed (18). The process comprises conducting fluid flow simulations using actual reactor conditions. During simulation, baffles (30,31,32)are added on the outer reaction surface of the displacement cylinder (12) to improve simulated fluid flow. The baffles (30,31,32) are added to the displacement cylinder (12) by entering the inner inert space of the cylinder (12) and attaching the baffles (30,31,32) to the reaction outer surface from the inner inert space. The process allows the modification of existing reactors without disassembling the reactor.

    摘要翻译： 本发明公开了一种改善气流催化剂床反应器组件的催化剂寿命和效率的方法和装置。 反应器包括外反应容器（10），内排量缸（12）和围绕排量缸（12）的环形催化剂床（18），其具有上半部和下半部。 通过将至少一个挡板（30,31,32）添加到排量缸（12）的上半部分来提高流体在反应容器（10）中的流动和穿过催化剂床（18）的均匀性来实现流体流动改进， 。 还公开了一种用于改进气相反应器中的流体流动均匀性的方法，其包括外部反应容器（10），具有上半部分和下半部分以及反应外表面和惰性内部空间的内部容积圆筒（12） 和环形催化剂床（18）。 该方法包括使用实际的反应器条件进行流体流动模拟。 在模拟期间，挡板（30,31,32）被添加在排量缸（12）的外部反应表面上以改善模拟的流体流动。 将挡板（30,31,32）通过进入气缸（12）的内部惰性空间并将挡板（30,31,32）从内部惰性气体（30,31,32）附接到反应外表面而添加到排量缸（12） 空间。 该方法允许在不拆卸反应器的情况下修改现有的反应器。