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    Method for producing maleic acid anhydride
    1.
    发明授权
    Method for producing maleic acid anhydride 有权
    马来酸酐生产方法

    公开(公告)号：US06803473B2

    公开(公告)日：2004-10-12

    申请号：US10220746

    申请日：2002-09-05

    申请人： Jens Weiguny ,  Sebastian Storck ,  Andreas Tenten ,  Wilhelm Ruppel

    发明人： Jens Weiguny ,  Sebastian Storck ,  Andreas Tenten ,  Wilhelm Ruppel

    IPC分类号： C07D30760

    CPC分类号： B01J8/067 ,  B01J2208/00212 ,  B01J2208/0053 ,  C07C51/215 ,  C07C57/145

    摘要： In a process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of hydrocarbons having at least four carbon atoms using oxygen-containing gases in the presence of a volatile phosphorus compound over a catalyst comprising vanadium, phosphorus and oxygen in a shell-and-tube reactor unit having at least two successive cooled reaction zones, the temperature of the first reaction zone is from 350 to 450° C. and the temperature of the second and further reaction zones is from 350 to 480° C. and the temperature difference between the hottest reaction zone and the coolest reaction zone is at least 2° C.

    摘要翻译： 在使用含氧气体的挥发性磷化合物存在下，在包含钒，磷和氧的催化剂存在下，通过异构催化气相氧化具有至少四个碳原子的烃来制备马来酸酐的方法， 管式反应器单元具有至少两个连续冷却的反应区，第一反应区的温度为350-450℃，第二反应区和其它反应区的温度为350-480℃，温度差为 最热的反应区和最冷的反应区为至少2℃

    Process for the preparation of maleic anhydride
    2.
    发明授权
    Process for the preparation of maleic anhydride 有权
    马来酸酐的制备方法

    公开(公告)号：US06620948B2

    公开(公告)日：2003-09-16

    申请号：US09901686

    申请日：2001-07-11

    申请人： Itaru Sawaki ,  Hideo Suwa ,  Yasunori Ishimura ,  Yoshiaki Iizuka ,  Mineo Izumi

    发明人： Itaru Sawaki ,  Hideo Suwa ,  Yasunori Ishimura ,  Yoshiaki Iizuka ,  Mineo Izumi

    IPC分类号： C07D30760

    CPC分类号： C07C51/215 ,  C07C57/145

    摘要： Disclosed is a process for the production of maleic anhydride, which comprises: reacting a hydrocarbon with an oxygen-containing gas in the presence of a catalyst; recovering maleic anhydride from the reaction gas; recovering unreacted hydrocarbon from the remaining gas; and returning the hydrocarbon thus recovered to the reactor for re-use, wherein said reaction is effected under the conditions such that the hydrocarbon concentration X (vol %) and oxygen concentration Y (vol) in all the gases to be fed into the reactor, the hydrocarbon conversion Z (t) in the reactor and the oxygen concentration W (vol %) in all the effluent gases from the reactor satisfy the following relationships: Y≧20, X+Y≦70, 1≦Y/X≦5, and 20(Y−10)/X≦Z≦25Y/X or 2≦W≦10.

    摘要翻译： 公开了一种生产马来酸酐的方法，其包括：在催化剂存在下使烃与含氧气体反应; 从反应气中回收马来酸酐; 从剩余的气体中回收未反应的烃; 并将如此回收的烃返回到反应器中进行再利用，其中所述反应在使得要供入反应器的所有气体中的烃浓度X（体积％）和氧浓度Y（vol） 反应器中的烃转化率Z（t）和来自反应器的所有流出气体中的氧浓度W（体积％）满足以下关系：

    Process for the production of maleic anhydride
    4.
    发明授权
    Process for the production of maleic anhydride 有权
    马来酸酐生产工艺

    公开(公告)号：US06458971B1

    公开(公告)日：2002-10-01

    申请号：US09577157

    申请日：2000-05-24

    申请人： Yoshiaki Iizuka ,  Tatsuya Ihara ,  Yasuyuki Yamauchi ,  Mamoru Sawano ,  Itaru Sawaki

    发明人： Yoshiaki Iizuka ,  Tatsuya Ihara ,  Yasuyuki Yamauchi ,  Mamoru Sawano ,  Itaru Sawaki

    IPC分类号： C07D30760

    CPC分类号： C07C51/215 ,  C07C57/145

    摘要： Disclosed is a process for the preparation of maleic anhydride which comprises subjecting an aliphatic hydrocarbon having four or more carbon atoms to gas phase oxidation reaction in the presence of a catalyst, wherein supposing that the function of reaction product gas composition is FL and the function of temperature and pressure of reaction product gas is FR, the safety index F satisfies the following relationship (1): F=FL−FR>0  (1) According to the present invention, it is possible that the loss of unreacted hydrocarbon and maleic anhydride as reaction product due to non-catalytic oxidation reaction is prevented while effecting the reaction in a stable manner, whereby the yield of maleic anhydride can be kept maximum while assuring safety.

    摘要翻译： 公开了一种制备马来酸酐的方法，其包括在催化剂存在下使具有四个或更多个碳原子的脂族烃进行气相氧化反应，其中假定反应产物气体组成的函数为FL， 反应产物气体的温度和压力为FR，安全指数F满足以下关系式（1）：根据本发明，由于非催化氧化反应，作为反应产物的未反应的烃和马来酸酐的损失可能 在稳定地进行反应的同时被防止，从而马来酸酐的产率可以保持最大，同时确保安全性。

    Method and apparatus for improving the uniformity of distribution of a phosphorus-containing agent throughout a maleic anhydride catalytic reactor
    5.
    发明授权
    Method and apparatus for improving the uniformity of distribution of a phosphorus-containing agent throughout a maleic anhydride catalytic reactor 有权
    一种改善含磷剂在整个马来酸酐催化反应器中的分布均匀性的方法和装置

    公开(公告)号：US06300505B1

    公开(公告)日：2001-10-09

    申请号：US09566421

    申请日：2000-05-08

    申请人： Joseph C. Burnett ,  William H. Alumbaugh ,  Lamar A. Reeves

    发明人： Joseph C. Burnett ,  William H. Alumbaugh ,  Lamar A. Reeves

    IPC分类号： C07D30760

    CPC分类号： B01J8/067 ,  B01J8/065 ,  B01J2208/0015 ,  B01J2208/00212 ,  B01J2208/00548 ,  B01J2219/00038 ,  C07C51/215 ,  C07C57/145

    摘要： Improved methods and apparatus for the preparation of maleic anhydride by reacting a hydrocarbon having at least four carbon atoms in a straight chain with molecular oxygen in a catalytic reactor, the reactor comprising a fixed catalyst bed having active sites comprising a vanadium-phosphorus-oxygen catalyst for the catalytic oxidation of the hydrocarbon to maleic anhydride, said process further comprising the continuous or intermittent introduction of a phosphorus-containing agent to the reactor. The introduction of the phosphorus-containing agent into the maleic anhydride production system is controlled so to provide for a more uniform distribution of the phosphorus-containing agent throughout the reactor. The methods of the invention are effective to reduce deposits of the phosphorus-containing agent or decomposition products of the phosphorus-containing agent on reactor surfaces other than the catalytic bed thereby decreasing reactor maintenance and increasing reactor lifetime.

    摘要翻译： 改进的用于通过在催化反应器中使具有至少四个碳原子的碳原子与分子氧反应制备马来酸酐的方法和装置，所述反应器包括具有包含钒 - 磷 - 氧催化剂的活性位点的固定催化剂床 为了将烃催化氧化成马来酸酐，所述方法还包括连续或间歇地向反应器中引入含磷试剂。 将含磷剂引入马来酸酐生产系统中进行控制以提供含磷剂在整个反应器中更均匀的分布。 本发明的方法有效地减少含磷试剂或除了催化床以外的反应器表面上的含磷物质的分解产物的沉积物，从而减少反应器的维持和增加反应器的寿命。

    Process for preparing enantiomer-enriched amino- and hydroxyfuranones
    8.
    发明授权
    Process for preparing enantiomer-enriched amino- and hydroxyfuranones 失效
    制备富含对映异构体的氨基和羟基呋喃酮的方法

    公开(公告)号：US06417377B1

    公开(公告)日：2002-07-09

    申请号：US10044908

    申请日：2002-01-15

    申请人： Peter Pöchlauer ,  Peter Riebel ,  Herbert Mayrhofer ,  Irma Wirth

    发明人： Peter Pöchlauer ,  Peter Riebel ,  Herbert Mayrhofer ,  Irma Wirth

    IPC分类号： C07D30760

    CPC分类号： C07D307/60 ,  C07D307/66

    摘要： A process for the preparation of enantiomer-enriched aminofuranones and hydroxyfuranones in which an enantiomer-enriched cyanohydrin is acylated by an acylating agent, then cyclized at 40 to 90° C. in the presence of zinc or a zinc compound to the corresponding enantiomer-enriched aminofuranone, which is converted where appropriate by acid hydrolysis into the corresponding enantiomer-enriched hydroxyfuranone.

    摘要翻译： 制备富含对映异构体的氨基呋喃酮和羟基呋喃酮的方法，其中富含对映异构体的氰醇被酰化剂酰化，然后在锌或锌化合物的存在下在40至90℃下环化成相应的对映体富集 氨基呋喃酮，其通过酸水解适当地转化成相应的富含对映异构体的羟基呋喃酮。

    Process for the production of maleic anhydride
    9.
    发明授权
    Process for the production of maleic anhydride 有权
    马来酸酐生产工艺

    公开(公告)号：US06310219B1

    公开(公告)日：2001-10-30

    申请号：US09450126

    申请日：1999-11-26

    申请人： Itaru Sawaki ,  Hideo Suwa ,  Yasunori Ishimura ,  Yoshiaki Iizuka ,  Mineo Izumi

    发明人： Itaru Sawaki ,  Hideo Suwa ,  Yasunori Ishimura ,  Yoshiaki Iizuka ,  Mineo Izumi

    IPC分类号： C07D30760

    CPC分类号： C07C51/215 ,  C07C57/145

    摘要： Disclosed is a process for the production of maleic anhydride, which comprises: reacting a hydrocarbon with an oxygen-containing gas in the presence of a catalyst; recovering maleic anhydride from the reaction gas; recovering unreacted hydrocarbon from the remaining gas; and returning the hydrocarbon thus recovered to the reactor for re-use, wherein said reaction is effected under the conditions such that the hydrocarbon concentration X (vol %) and oxygen concentration Y (vol %) in all the gases to be fed into the reactor, the hydrocarbon conversion Z (%) in the reactor and the oxygen concentration W (vol %) in all the effluent gases from the reactor satisfy the following relationships: Y≧20, X+Y≦70, 1≦Y/X≦5, and 20(Y−10)/X≦Z≦25Y/X or 2≦W≦10.

    摘要翻译： 公开了一种生产马来酸酐的方法，其包括：在催化剂存在下使烃与含氧气体反应; 从反应气中回收马来酸酐; 从剩余的气体中回收未反应的烃; 并将如此回收的烃返回到反应器中进行再利用，其中所述反应在所有要供入反应器的气体中的烃浓度X（体积％）和氧浓度Y（体积％）的条件下进行 ，反应器中的烃转化率Z（％）和来自反应器的所有流出气体中的氧浓度W（体积％）满足以下关系：