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    Gas phase alkylation with split load of catalyst
    5.
    发明公开
    Gas phase alkylation with split load of catalyst 有权
    Verfahren zur Alkylierung in der Gasphase mit gespaltener Katalysatorbeladung

    公开(公告)号：EP1002778A1

    公开(公告)日：2000-05-24

    申请号：EP99122754.7

    申请日：1999-11-16

    申请人： FINA TECHNOLOGY, INC.

    发明人： Merrill, James T. ,  Butler, James R. ,  Ghosh, Ashim K.

    IPC分类号： C07C2/66 ,  C07C15/073

    CPC分类号： C07C15/073 ,  C07C2/66 ,  C07C2529/035 ,  C07C2529/08

    摘要： Ethylbenzene is produced by alkylation over a split load of monoclinic silicalite alkylation catalysts having different silica/alumina ratios. A feedstock containing benzene and ethylene is applied to a multi-stage alkylation reaction zone having a plurality of series-connected catalyst beds. At least one catalyst bed contains a first monoclinic silicalite catalyst having a silica/alumina ratio of at least 275. At least one other catalyst bed contains a second monoclinic silicalite catalyst having a silica/alumina ratio of less than about 275. The alkylation reaction zone is operated at temperature and pressure conditions in which the benzene is in a gaseous phase to cause gas-phase alkylation of the aromatic substrate in the presence of the monoclinic silicalite catalysts to produce an alkylation product. The alkylation product is then withdrawn from the reaction zone for separation and recovery. The use of the split load of catalyst allows a higher purity ethylbenzene product to be produced at improved efficiencies than if only one of the catalysts were used by itself.

    摘要翻译： 通过在具有不同二氧化硅/氧化铝比的单斜晶硅沸石烷基化催化剂的分裂载荷下烷基化制备乙苯。 将含有苯和乙烯的原料施加到具有多个串联催化剂床的多级烷基化反应区。 至少一个催化剂床含有二氧化硅/氧化铝比至少为275的第一单斜晶硅沸石催化剂。至少一个其它催化剂床含有二氧化硅/氧化铝比小于约275的第二单斜硅沸石催化剂。烷基化反应区 在其中苯处于气相的温度和压力条件下操作，以在单斜硅沸石催化剂的存在下引起芳族底物的气相烷基化以产生烷基化产物。 然后将烷基化产物从反应区取出以进行分离和回收。 与仅使用一种催化剂本身一起使用时，使用催化剂的分体负载允许以提高的效率生产更高纯度的乙苯产物。

    Aromatic alkylation process
    7.
    发明公开
    Aromatic alkylation process 有权
    芳香族烷基化过程

    公开(公告)号：EP0943594A1

    公开(公告)日：1999-09-22

    申请号：EP99103541.1

    申请日：1999-02-24

    申请人： FINA TECHNOLOGY, INC.

    发明人： Ghosh, Ashim K.

    IPC分类号： C07C2/66 ,  C07C15/073

    CPC分类号： C07C2/66 ,  B01J29/7057 ,  C07C2529/70 ,  Y02P20/52 ,  C07C15/02 ,  C07C15/073

    摘要： A process for the alkylation of an aromatic substrate over a molecular sieve zeolite catalyst involving supplying an aromatic substrate to a reaction zone containing the catalyst. The molecular sieve catalyst is an effective aromatic alkylation catalyst and comprises a modified zeolite beta alkylation catalyst having an intergrowth of a ZSM-12 crystalline framework within the crystalline framework of zeolite beta. An alkylating agent is also supplied to the reaction zone which is operated under temperature and pressure conditions effective to cause alkylation of the aromatic substrate by the alklating agent. An alkylated substrate is recovered from the reaction zone.
    A specific catalyst used in the invention is characterized by an x-ray diffraction pattern characteristic of zeolite beta and having a maximum peak at an interplanar spacing D of 4.0/±0.1A and secondary peaks S 1 at a D spacing of 11.4±.2A, S 2 at a D spacing of 4.2±.1A and a secondary doublet S 3 , S 4 at D spacings within the range of about 3.0-3.4±.1A, and further comprising a first secondary peak characteristic of ZSM-12 occurring at an interplanar spacing D 10.0±2A and additional secondary peaks characteristic of ZSM-12 at D spacings less than the D spacing of said primary peak but greater than the D spacing of said doublet S 3 , S 4 . Specifically, the aromatic substrate is benzene and the alkylating agent is a C 2 -C 4 alkylating agent, specifically ethylene. In a specific embodiment of the invention, there is provided a process for the production of ethylbenzene by the liquid phase ethylation of benzene. In this embodiment of the invention, benzene and an ethylating agent are supplied to a reaction zone comprising a modified zeolite beta alkylation catalyst. The reaction zone is operated under temperature and pressure conditions to maintain the benzene in the liquid phase to cause monoethylation of the benzene under conditions which the xylene produced in the reaction zone is no more than 0.05 wt.% based upon the amount of ethylbenzene produced. The toluene in the reaction zone is no more than 0.1 wt.% based upon the amount of ethylbenzene produced.

    摘要翻译： 一种芳香族底物在分子筛沸石催化剂上烷基化的方法，包括将芳族底物提供给含有催化剂的反应区。 分子筛催化剂是有效的芳族烷基化催化剂，并且包含在沸石β的结晶框架内具有ZSM-12结晶骨架的共生的改性沸石β烷基化催化剂。 烷基化剂也供应到反应区中，该反应区在有效引起烷基化剂对芳族底物烷基化的温度和压力条件下操作。 从反应区回收烷基化的底物。 用于本发明的特定催化剂的特征在于沸石β的X-射线衍射图特征，并且在晶面间距D为4.0 /±0.1A处具有最大峰，在D间距为11.4±0.2A处具有次级峰S1， S2间距为4.2±1.A，D间距为约3.0-3.4±1.A的第二双峰S3，S4，并且还包括出现在晶面间距D处的ZSM-12的第一次要峰特征 10.0±2A，并且在D间隔处ZSM-12的另外的次级峰特征小于所述主峰的D间距，但大于所述双峰S3，S4的D间距。 具体而言，芳香族底物是苯，烷基化剂是C 2 -C 4烷基化剂，特别是乙烯。 在本发明的具体实施方案中，提供了通过苯的液相乙基化生产乙苯的方法。 在本发明的这个实施方案中，将苯和乙基化剂供应到包含改性沸石β烷基化催化剂的反应区中。 反应区在温度和压力条件下操作，以保持苯在液相中，在反应区中产生的二甲苯不超过产生的乙苯量的0.05重量％的条件下引起苯的单乙基化。 基于产生的乙苯量，反应区中的甲苯不超过0.1重量％。

    A start-up process for improved selectivity in toluene disproportionation
    9.
    发明公开
    A start-up process for improved selectivity in toluene disproportionation 失效
    Anlaufprozess zur verb dessertenSelektivitätder Toluol-Disproportionierung。

    公开(公告)号：EP0538229A2

    公开(公告)日：1993-04-21

    申请号：EP92870158.0

    申请日：1992-09-29

    申请人： FINA TECHNOLOGY, INC.

    发明人： Shamshoum, Edwar S. ,  Ghosh, Ashim K. ,  Schuler, Thomas R.

    IPC分类号： C07C6/12 ,  C07C15/04 ,  C07C15/08

    CPC分类号： C07C6/123 ,  C07C2523/755 ,  C07C2529/18 ,  C07C2529/24 ,  Y02P20/52

    摘要： A start-up procedure for use in the disproportionation of co-fed hydrogen and toluene feedstock over a nickel mordenite catalyst containing between 1.0 - 1.5 weight per cent nickel and having a silica to alumina molar ratio of between 16:1 and 22:1. At reaction start-up, the hydrogen to toluene molar ratio is maintained at an unconventionally low level of between 0.5 and 3.3. With an initial temperature of 250°C and under pressure of 550 psig or greater, toluene disproportionation is effected resulting in desirably high selectivity to benzene product and simultaneously low selectivity to undesirable non-aromatic compound by-product.

    摘要翻译： 用于在含有1.0-1.5重量％镍并具有16:1至22:1之间的二氧化硅与氧化铝摩尔比的镍丝光沸石催化剂中共同供给氢气和甲苯原料歧化的启动程序。 在反应启动时，氢与甲苯的摩尔比保持在0.5至3.3之间的非常规低水平。 在250℃的初始温度和550psig或更大的压力下，进行甲苯歧化，从而产生对苯产物的期望的高选择性，同时对不期望的非芳族化合物副产物的选择性低。

    Modified zeolite alkylation catalyst and process employing same
    10.
    发明公开
    Modified zeolite alkylation catalyst and process employing same 失效
    Modifizierter Zeolit-Alkylierungskatalysator和Gebrauchsverfahren。

    公开(公告)号：EP0507761A1

    公开(公告)日：1992-10-07

    申请号：EP92870056.6

    申请日：1992-04-03

    申请人： FINA TECHNOLOGY, INC.

    发明人： Shamshoum, Edwar S. ,  Schuler, Thomas R. ,  Ghosh, Ashim K.

    IPC分类号： B01J29/70 ,  C07C2/74

    CPC分类号： B01J29/7057 ,  B01J2229/26 ,  B01J2229/42 ,  C07C2/66 ,  C07C2529/70 ,  Y02P20/52 ,  C07C15/02

    摘要： A metal modified alkylation catalyst comprising a lanthanum/beta zeolite is provided, The lanthanum/beta zeolite has a surface area based upon the crystalline structure of the lanthanum/beta zeolite of at least 600m 2 /g and a sodium content in the crystalline structure of the lanthanum/beta zeolite of less than 0,04 weight percent Na 2 O.
    A process for the preparation and utilization of the lanthanum/beta zeolite is also provided. The process is particularly useful for the alkylation of an aromatic substrate in the liquid phase by a low molecular weight alkylating agent. A specific process involves the alkylation of benzene with ethylene to produce ethylbenzene. The process is carried out in the liquid phase and at alkylation condition under which the xylene make, based upon the amount of ethylbenzene produced, is no more than 0.03 weight percent.

    摘要翻译： 提供了包含镧/β沸石的金属改性烷基化催化剂。镧/β沸石具有基于镧/β沸石的晶体结构至少为600m 2 / g的表面积，并且晶体中的钠含量 镧/β沸石的结构小于0.04重量％的Na 2 O。 还提供了用于制备和利用镧/β沸石的方法。 该方法特别适用于通过低分子量烷基化剂在液相中烷基化芳族底物。 具体方法涉及苯与乙烯的烷基化以产生乙苯。 该方法在液相和烷基化条件下进行，二甲苯根据生成的乙苯的量不超过0.03重量％。