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    Production of high purity aromatic carboxylic acid by oxidation in benzoic acid and water solvent
    4.
    发明授权
    Production of high purity aromatic carboxylic acid by oxidation in benzoic acid and water solvent 失效
    在苯甲酸和水溶剂中通过氧化生产高纯度芳族羧酸

    公开(公告)号：US06562997B2

    公开(公告)日：2003-05-13

    申请号：US09766192

    申请日：2001-01-19

    申请人： David L. Sikkenga ,  Alpen K. Pandya ,  Ian C. Zaenger ,  Kenneth J. Abrams ,  Thomas M. Bartos

    发明人： David L. Sikkenga ,  Alpen K. Pandya ,  Ian C. Zaenger ,  Kenneth J. Abrams ,  Thomas M. Bartos

    IPC分类号： C07C5116

    CPC分类号： C07C51/43 ,  C07C51/265 ,  C07C63/26 ,  C07C63/38 ,  C07C63/24 ,  C07C63/16

    摘要： Processes for the production of aromatic carboxylic acids is disclosed. The aromatic acids are produced by the liquid phase oxidation of a suitable acid precursor in a reaction medium comprising benzoic acid. According to one embodiment, the oxidation is carried out under plug-flow reaction conditions in a plug-flow reactor. The plug-flow conditions can be achieved by the use of a series of continuous stirred tank reactors. In another embodiment, the oxidation is carried out in two continuous stirred tank reactors fluidly connected in series. The preferred oxidation products are terephthalic acid, isophthalic acid, trimellitic acid, 2,6-naphthalene dicarboxylic acid, 1,5-napthalene dicarboxylic acid, 2,7-naphthalene dicarboxylic acid and phthalic acid.

    摘要翻译： 公开了制备芳族羧酸的方法。 芳族酸通过在包含苯甲酸的反应介质中的合适的酸前体的液相氧化产生。 根据一个实施方案，氧化在活塞流反应器的活塞流反应条件下进行。 堵塞流动条件可以通过使用一系列连续搅拌釜反应器来实现。 在另一个实施方案中，氧化是在两个连续的搅拌釜反应器中进行的，该反应器是流体连接的。 优选的氧化产物是对苯二甲酸，间苯二甲酸，偏苯三酸，2,6-萘二甲酸，1,5-萘二羧酸，2,7-萘二甲酸和邻苯二甲酸。

    Process for preparing purified aromatic polycarboxylic acids
    5.
    发明授权
    Process for preparing purified aromatic polycarboxylic acids 失效
    制备纯化的芳族多元羧酸的方法

    公开(公告)号：US5770764A

    公开(公告)日：1998-06-23

    申请号：US858362

    申请日：1997-05-19

    申请人： Martin A. Zeitlin ,  David L. Sikkenga ,  Stephen V. Hoover ,  Paul K. Behrens

    发明人： Martin A. Zeitlin ,  David L. Sikkenga ,  Stephen V. Hoover ,  Paul K. Behrens

    IPC分类号： C07C51/265 ,  C07C51/487 ,  C07C51/16

    CPC分类号： C07C51/487 ,  C07C51/265

    摘要： Economical processes are disclosed for preparing relatively pure polycarboxylic acid from typical crude products of liquid phase oxidation, which do not involve intermediate steps of ester formation or require any alkanol containing solvent, for purification of "crude" polycarboxylic acid containing impurities which include one or more monofunctional aromatic compounds, trifunctional aromatic compounds, and/or color causing organic compounds formed by oxidation of a corresponding substituted aromatic compound in a liquid phase, e.g. 2,6-naphthalene dicarboxylic acid by liquid phase oxidation of 2,6-dimethyl naphthalene. The invention provides integrate processes which comprise reacting crude oxidation product with a polyalkyl amine amine, e.g. trialkylamine, forming an aqueous solution of the salts thus obtained, separating deleterious compounds from the solution, and recovering the polyalkyl amine and a relatively pure polycarboxylic acid product.

    摘要翻译： 公开的经济方法用于从典型的液相氧化粗产物制备相对纯的多元羧酸，其不涉及酯形成的中间步骤或需要任何含链烷醇的溶剂，用于纯化含有一种或多种含杂原子的“粗”多元羧酸 单官能芳族化合物，三官能芳族化合物和/或由液相中相应的取代芳族化合物氧化形成的有色化合物，例如 2,6-萘二甲酸通过液相氧化2,6-二甲基萘。 本发明提供了整合方法，其包括使粗氧化产物与多烷基胺胺反应， 三烷基胺，形成由此获得的盐的水溶液，从溶液中分离有害化合物，并回收多烷基胺和相对纯的多元羧酸产物。

    Selective synthesis of pseudocumene and durene
    7.
    发明授权
    Selective synthesis of pseudocumene and durene 失效
    假枯烯和杜烯的选择性合成

    公开(公告)号：US4891467A

    公开(公告)日：1990-01-02

    申请号：US776221

    申请日：1985-09-16

    申请人： David L. Sikkenga

    发明人： David L. Sikkenga

    IPC分类号： C07C2/86

    CPC分类号： C07C2/865 ,  C07C2/861 ,  C07C2/864 ,  C07C2/868 ,  C07C2529/86

    摘要： A catalytic process is provided for the selective production of pseudocumene and durene by contacting a hydrocarbon feed containing benzene or a methyl substituted benzene under methylating conditions and in the presence of a methylating agent with a catalyst comprising AMS-1B crystalline borosilicate. In the resulting product pseudocumene and durene are obtained in selectivities higher than equilibrium concentrations of respectively trimethylbenzenes and tetramethylbenzenes.

    摘要翻译： 提供催化方法，用于通过在甲基化条件下和甲基化剂与含有AMS-1B晶体硼硅酸盐的催化剂的存在下使包含苯或甲基取代的苯的烃进料接触来选择性地生产假枯烯和杜烯。 在所得产物中，以高于平均浓度的三甲基苯和四甲基苯的选择性获得假枯烯和杜烯。

    Method for preparing aromatic carboxylic acids
    8.
    发明授权
    Method for preparing aromatic carboxylic acids 失效
    芳香羧酸的制备方法

    公开(公告)号：US5292934A

    公开(公告)日：1994-03-08

    申请号：US900593

    申请日：1992-06-18

    申请人： David L. Sikkenga ,  George E. Kuhlmann ,  Paul K. Behrens ,  Martin A. Zeitlin ,  Stephen V. Hoover

    发明人： David L. Sikkenga ,  George E. Kuhlmann ,  Paul K. Behrens ,  Martin A. Zeitlin ,  Stephen V. Hoover

    IPC分类号： C07C51/255 ,  C07C51/265 ,  C07C51/487 ,  C07C51/23

    CPC分类号： C07C51/265 ,  C07C51/255 ,  C07C51/487

    摘要： Disclosed is a method for preparing an aromatic carboxylic acid comprising oxidizing in the liquid phase an aromatic feed compound containing at least one alkyl or acyl group with a molecular oxygen-containing gas, in a solvent comprising a low molecular weight aliphatic carboxylic acid, and in the presence of a heavy metal oxidation catalyst, thereby forming an oxidation reaction product mixture comprising an aromatic carboxylic acid; subsequently heating the oxidation reaction product mixture at a temperature of at least about 500.degree. F. to form a second product mixture; and recovering from the second product mixture the aromatic carboxylic acid. The method of this invention provides for purer, larger particle size aromatic carboxylic acid product.

    摘要翻译： 公开了一种制备芳族羧酸的方法，包括在包含低分子量脂族羧酸的溶剂中在液相中氧化含有至少一个烷基或酰基的含分子氧的气体的芳族进料化合物， 存在重金属氧化催化剂，从而形成包含芳族羧酸的氧化反应产物混合物; 随后在至少约500华氏度的温度下加热氧化反应产物混合物以形成第二产物混合物; 并从第二产物混合物中回收芳族羧酸。 本发明的方法提供了更纯的较大颗粒度的芳族羧酸产物。

    Catalytic alkenylbenzene cyclization
    10.
    发明授权
    Catalytic alkenylbenzene cyclization 失效
    催化烯基苯环化

    公开(公告)号：US5034561A

    公开(公告)日：1991-07-23

    申请号：US539087

    申请日：1990-06-15

    申请人： David L. Sikkenga ,  Gregory S. Williams ,  Ian C. Zaenger

    发明人： David L. Sikkenga ,  Gregory S. Williams ,  Ian C. Zaenger

    IPC分类号： B01J29/08 ,  C07B61/00 ,  C07C5/31 ,  C07C5/393 ,  C07C13/48

    CPC分类号： C07C5/31 ,  B01J2219/00101

    摘要： A method is provided for cyclizing an alkenylbenzene to a dialkyltetrahydronaphthalene (dialkyltetralin) in the presence of a solid cyclization catalyst constituted by a relatively low acidity, ultrastable, hydrogen form of crystalline aluminosilicate zeolite Y having a sodium oxide-to-alumina bulk molar ratio in the range of about 0.001 to about less than 1, a unit cell size no greater than about 24.3 Angstroms, and a sodium content of no more than about 0.4 percent by weight, calculated as elemental sodium and based on the weight of the zeolite. This catalyst provides more activity, more stability, higher product purity, and higher product yields than known prior art zeolite cyclization catalysts notwithstanding its relatively lower acidity. A preferred alkenylbenzene is 5-(o-tolyl)-pent-2-ene which is converted in relatively high yields and relatively high selectivities to 1,5 dimethyltetrahydronaphthalene.