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    Removal of polar contaminants from aromatic feedstocks
    1.
    发明授权
    Removal of polar contaminants from aromatic feedstocks 有权
    从芳香原料中除去极性污染物

    公开(公告)号：US06753452B2

    公开(公告)日：2004-06-22

    申请号：US10375784

    申请日：2003-02-27

    申请人： Chaya R. Venkat ,  Yun-Yang Huang ,  Thomas Francis Degnan, Jr. ,  John P. McWilliams ,  Ronald A. Weiss

    发明人： Chaya R. Venkat ,  Yun-Yang Huang ,  Thomas Francis Degnan, Jr. ,  John P. McWilliams ,  Ronald A. Weiss

    IPC分类号： C07C266

    CPC分类号： C07C15/02 ,  C07C7/13 ,  C07C2529/70 ,  C07C15/00

    摘要： A process is described for removing polar compounds from an aromatic feedstock which contains polar compounds. The process comprises contacting the feedstock in an adsorption zone at a temperature of less than or equal to 130° C. with an adsorbent selective for the adsorption of said polar compounds and comprising a molecular sieve having surface cavities with cross-sectional dimensions greater than 5.6 Angstroms. A treated feedstock substantially free of said polar compounds can then be fed to an alkylation zone for contact under liquid phase alkylation conditions with an alkylating agent in the presence of an alkylation catalyst.

    摘要翻译： 描述了从含有极性化合物的芳族原料中除去极性化合物的方法。 该方法包括使原料在小于或等于130℃的吸附区中与选择性吸附所述极性化合物的吸附剂接触，并且包含具有横截面尺寸大于5.6的表面空腔的分子筛 埃 然后可以在烷基化催化剂存在下，将烷基化剂在液相烷基化条件下进料至基本不含所述极性化合物的处理过的原料。

    Aromatic alkylation process
    2.
    发明授权
    Aromatic alkylation process 有权
    芳香烷基化工艺

    公开(公告)号：US06313362B1

    公开(公告)日：2001-11-06

    申请号：US09213798

    申请日：1998-12-17

    申请人： John R. Green ,  Thomas F. Degnan ,  Yun-Yang Huang ,  Chaya R. Venkat ,  Ronald A. Weiss

    发明人： John R. Green ,  Thomas F. Degnan ,  Yun-Yang Huang ,  Chaya R. Venkat ,  Ronald A. Weiss

    IPC分类号： C07C264

    CPC分类号： C07C15/085 ,  C07C15/073

    摘要： Akylation product is contacted with a purification medium in a liquid phase pre-reaction step to remove impurities and form a purified stream. The purified stream may then be further processed by liquid phase transalkylation to convert the polyalkylated aromatic compound to a monoalkylated aromatic compound. The process may use a large pore molecular sieve catalyst such as MCM-22 as the purification medium in the pre-reaction step because of its high reactivity for alkylation, strong retention of catalyst poisons and low reactivity for oligomerization under the pre-reactor conditions. Olefins, diolefins, styrene, oxygenated organic compounds, sulfur containing compounds, nitrogen containing compounds and oligomeric compounds are removed.

    摘要翻译： 将Akylation产物在液相预反应步骤中与净化介质接触以除去杂质并形成纯化的物流。 然后可以通过液相烷基转移进一步处理纯化的物流，以将多烷基化芳族化合物转化为单烷基化芳族化合物。 在预反应步骤中，该方法可以使用大孔分子筛催化剂例如MCM-22作为纯化介质，因为其在烷基化反应活性高，催化剂毒物强烈的保留和在反应器前条件下的低聚反应低。 除去烯烃，二烯烃，苯乙烯，含氧有机化合物，含硫化合物，含氮化合物和低聚物。

    Process for liquid phase aromatics alkylation comprising in-situ catalyst reactivation with polar compounds
    3.
    发明授权
    Process for liquid phase aromatics alkylation comprising in-situ catalyst reactivation with polar compounds 有权
    液相芳烃烷基化方法，包括用极性化合物原位催化剂再活化

    公开(公告)号：US06909026B2

    公开(公告)日：2005-06-21

    申请号：US10318882

    申请日：2002-12-13

    申请人： Ajit B. Dandekar ,  Thomas Francis Degnan ,  John P. McWilliams ,  Chaya R. Venkat

    发明人： Ajit B. Dandekar ,  Thomas Francis Degnan ,  John P. McWilliams ,  Chaya R. Venkat

    IPC分类号： C07C2/66 ,  C07C2/68

    CPC分类号： C07C2/66 ,  C07C2529/08 ,  C07C2529/18 ,  C07C2529/40 ,  C07C2529/50 ,  C07C2529/65 ,  C07C2529/70 ,  Y02P20/584 ,  C07C15/073

    摘要： The catalyst becomes at least partially deactivated by sorbing catalyst poisons present in the feed during a process for alkylating aromatics by contacting a feed containing benzene, toluene, xylenes, alkylbenzenes, naphthalene or substituted naphthalenes under liquid phase alkylating conditions with C2-C16 olefins in the presence of MCM-22, MCM-36, MCM-49, MCM-56, ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-48, ZSM-50, ZSM-4, ZSM-18, ZSM-20, Zeolite X, Zeolite Y, USY, mordenite or offretite to provide an alkylated aromatic product. The at least partially deactivated catalyst can be treated in situ by contacting with at least one polar compound having a dipole moment of at least 0.05 Debyes and selected from the group consisting of acetic acid, formic acid, water, and carbon monoxide, under conditions of temperature and pressure employed in the liquid phase alkylating conditions which are sufficient to at least partially desorb the catalyst poison from the catalyst.

    摘要翻译： 在芳族化合物的烷基化方法中，通过在液相烷基化条件下将含有苯，甲苯，二甲苯，烷基苯，萘或取代萘的进料与C 2 H 2化合物接触，使催化剂至少部分失活， 在MCM-22，MCM-36，MCM-49，MCM-56，ZSM-5，ZSM-11，ZSM-12，ZSM-23等的存在下， ZSM-35，ZSM-48，ZSM-50，ZSM-4，ZSM-18，ZSM-20，沸石X，沸石Y，USY，丝光沸石或黑斑，提供烷基化芳族产物。 所述至少部分失活的催化剂可以通过与至少一种偶极矩至少为0.05德拜的极性化合物接触而原位处理，并选自乙酸，甲酸，水和一氧化碳，条件是 在液相烷基化条件下使用的足以使催化剂毒物至少部分解吸的催化剂的温度和压力。

    Process for liquid phase aromatics alkylation comprising in-situ catalyst reactivation with polar compounds
    4.
    发明授权
    Process for liquid phase aromatics alkylation comprising in-situ catalyst reactivation with polar compounds 有权
    液相芳烃烷基化方法，包括用极性化合物原位催化剂再活化

    公开(公告)号：US06525234B1

    公开(公告)日：2003-02-25

    申请号：US09717705

    申请日：2000-11-21

    申请人： Ajit B. Dandekar ,  Thomas Francis Degnan ,  John P. McWilliams ,  Chaya R. Venkat

    发明人： Ajit B. Dandekar ,  Thomas Francis Degnan ,  John P. McWilliams ,  Chaya R. Venkat

    IPC分类号： C07C268

    CPC分类号： C07C2/66 ,  C07C2529/08 ,  C07C2529/18 ,  C07C2529/40 ,  C07C2529/50 ,  C07C2529/65 ,  C07C2529/70 ,  Y02P20/584 ,  C07C15/073

    摘要： A process for alkylating aromatics comprises: i) contacting a feed containing alkylatable aromatic, e.g., benzene, under liquid phase alkylating conditions with an alkylating agent, e.g., ethylene, in the presence of an alkylation catalyst comprising a porous crystalline material, e.g., MCM-22, to provide an alkylated aromatic product during which contacting said catalyst becomes at least partially deactivated by sorbing catalyst poisons present in said feed; ii) treating said at least partially deactivated catalyst in situ by contacting with at least one polar compound, e.g., water or acetic acid, having a dipole moment of at least 0.05 Debyes under conditions of temperature and pressure employed in said liquid phase alkylating conditions which are sufficient to at least partially desorb said catalyst poison from said catalyst; and iii) collecting said alkylated aromatic product.

    摘要翻译： 烷基化芳族化合物的方法包括：i）在液相烷基化条件下，在包含多孔结晶材料的烷基化催化剂（例如MCM）的存在下，使含有可烷基化芳族化合物（例如苯）的进料与烷基化试剂例如乙烯接触 -22，以提供烷基化芳族产物，其中通过吸附所述进料中存在的催化剂毒物使所述催化剂接触至少部分失活; ii）通过与至少一种极性化合物接触来处理所述至少部分失活的催化剂，例如， 水或乙酸，其在所述液相烷基化条件下使用的温度和压力条件下的偶极矩至少为0.05德拜，其足以使所述催化剂毒物至少部分地解吸所述催化剂毒物; 和ii）收集所述烷基化芳族产物。

    Continuous process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation
    6.
    发明授权
    Continuous process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation 失效
    使用液相烷基化和气相烷基转移制备乙苯的连续方法

    公开(公告)号：US5600048A

    公开(公告)日：1997-02-04

    申请号：US364145

    申请日：1994-12-27

    申请人： Jane C. Cheng ,  C. Morris Smith ,  Chaya R. Venkat ,  Dennis E. Walsh

    发明人： Jane C. Cheng ,  C. Morris Smith ,  Chaya R. Venkat ,  Dennis E. Walsh

    IPC分类号： B01J29/70 ,  C07C2/66 ,  C07C6/12 ,  C07C15/073

    CPC分类号： C07C15/073 ,  C07C6/126 ,  C07C2529/40 ,  C07C2529/65 ,  C07C2529/70 ,  Y02P20/582

    摘要： There is provided a process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation. The liquid phase alkylation reaction may be catalyzed by an acidic solid oxide, such as MCM-22, MCM-49 and MCM-56. The vapor phase transalkylation may be catalyzed by a medium-pore size zeolite such as ZSM-5. The process may be run continuously with the continuous introduction of fresh benzene feed containing at least 500 ppm of nonbenzene hydrocarbon impurities. The combined ethylbenzene product of these alkylation and transalkylation reactions has very low levels of impurities including xylene, hydrocarbons having 7 or less carbon atoms and hydrocarbons having 9 or more carbon atoms.

    摘要翻译： 提供了使用液相烷基化和气相烷基转移制备乙苯的方法。 液相烷基化反应可以由酸性固体氧化物如MCM-22，MCM-49和MCM-56催化。 气相烷基转移可以通过中等孔径的沸石催化，例如ZSM-5。 该方法可以连续引入含有至少500ppm非苯烃杂质的新鲜苯进料而连续进行。 这些烷基化和烷基转移反应的组合乙苯产物具有非常低的杂质含量，包括二甲苯，具有7个或更少碳原子的烃和具有9个或更多个碳原子的烃。

    Pyridine/picoline production process
    7.
    发明授权
    Pyridine/picoline production process 失效
    吡啶/甲基吡啶生产工艺

    公开(公告)号：US5969143A

    公开(公告)日：1999-10-19

    申请号：US2363

    申请日：1997-12-31

    申请人： Arthur Chester ,  Scott Han ,  Dominick N. Mazzone ,  Chaya R. Venkat

    发明人： Arthur Chester ,  Scott Han ,  Dominick N. Mazzone ,  Chaya R. Venkat

    IPC分类号： C07D213/06 ,  C07B61/00 ,  C07C211/00 ,  C07D213/08 ,  C07D213/10 ,  C07D213/14 ,  C07G213/09

    CPC分类号： C07C211/00 ,  C07D213/06 ,  C07D213/08 ,  C07D213/10 ,  C07D213/14 ,  C07B61/00

    摘要： There is provided a high efficiency base synthesis process for shape selective production of pyridine and picoline products from ammonia and C.sub.1-5 carbonyl compounds. The process includes reacting ammonia and at least one C.sub.1-5 carbonyl reactant under suitable reaction conditions of temperature, pressure, and space velocity in the presence of a catalyst comprising a molecular sieve to produce a primary product comprising pyridine or picoline products and polyalkylpyridines or other higher molecular weight aromatic species, separating and collecting the pyridine or picoline products from the polyalkylpyridines or other higher molecular weight aromatic species, and circulating the polyalkylpyridines or other higher molecular weight aromatic species to the same or another catalyst under conversion conditions to yield additional pyridine or picoline products with substantially reduced amounts of polyalkylpyridines or other higher molecular weight aromatic species.

    摘要翻译： 提供了一种从氨和C 1-5羰基化合物形成选择性生产吡啶和甲基吡啶产物的高效碱基合成方法。 该方法包括在包含分子筛的催化剂存在下，在温度，压力和空间速度的合适反应条件下使氨和至少一种C 1-5羰基反应物反应，以产生包含吡啶或甲基吡啶产物和聚烷基吡啶或其它 较高分子量的芳族物质，从聚烷基吡啶或其它较高分子量的芳族物质中分离和收集吡啶或甲基吡啶产物，并将多烷基吡啶或其它较高分子量的芳族物质在转化条件下循环至相同或另一种催化剂，以产生额外的吡啶或 具有大量减少量的聚烷基吡啶或其它较高分子量芳族物质的甲基吡啶产物。

    Dual bed xylene isomerization
    9.
    发明授权
    Dual bed xylene isomerization 失效
    双床二甲苯异构化

    公开(公告)号：US5516956A

    公开(公告)日：1996-05-14

    申请号：US342322

    申请日：1994-11-18

    申请人： Jeevan S. Abichandani ,  Chaya R. Venkat

    发明人： Jeevan S. Abichandani ,  Chaya R. Venkat

    IPC分类号： B01J29/04 ,  B01J29/44 ,  B01J29/65 ,  B01J29/70 ,  B01J31/02 ,  C07C4/18 ,  C07C5/27 ,  C07C15/00 ,  C07C15/067 ,  C07C15/08 ,  C07C5/22

    CPC分类号： C07C15/08 ,  B01J29/44 ,  C07C15/00 ,  C07C15/067 ,  C07C4/18 ,  C07C5/2708 ,  B01J2229/12 ,  B01J2229/42 ,  B01J29/65 ,  B01J29/70 ,  C07C2529/06 ,  C07C2529/40 ,  C07C2529/65 ,  C07C2529/70 ,  Y02P20/52

    摘要： A mixture of aromatic hydrocarbons, comprising ethylbenzene and at least one xylene, is isomerized using a two component catalyst system to convert the ethylbenzene to compounds that may be removed from the aromatic hydrocarbon stream and to produce a product stream wherein the para-xylene concentration is approximately equal to the equilibrium ratio of the para-isomer. The first catalyst comprises an intermediate pore size zeolite that is effective for ethylbenzene conversion. The first catalyst is preferably silica-bound. The second catalyst comprises an intermediate pore size zeolite, which further has a small crystal size and which is effective to catalyze xylene isomerization. Each of the catalysts of this invention may contain one or more hydrogenation/dehydrogenation component.

    摘要翻译： 使用双组分催化剂体系将包含乙苯和至少一种二甲苯的芳族烃混合物转化成可将乙苯转化成可从芳烃流中除去的化合物，并产生产物流，其中对二甲苯浓度为 大约等于对位异构体的平衡比。 第一种催化剂包括对乙苯转化有效的中等孔径的沸石。 第一催化剂优选是二氧化硅结合的。 第二种催化剂包括中等孔径的沸石，其进一步具有小的晶体尺寸并且有效催化二甲苯异构化。 本发明的每种催化剂可以含有一种或多种氢化/脱氢组分。