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    Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid
    3.
    发明授权
    Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid 有权
    将丙烯非均相催化部分气相氧化成丙烯酸

    公开(公告)号：US07019168B2

    公开(公告)日：2006-03-28

    申请号：US10465653

    申请日：2003-06-20

    申请人： Martin Dieterle ,  Jochen Petzoldt ,  Klaus Joachim Müller-Engel ,  Hans Martan

    发明人： Martin Dieterle ,  Jochen Petzoldt ,  Klaus Joachim Müller-Engel ,  Hans Martan

    IPC分类号： C07C51/16 ,  C07C57/02

    CPC分类号： C07C51/252 ,  C07C57/04

    摘要： In a process for partially oxidizing propene to acrylic acid in the gas phase under heterogeneous catalysis, a starting reaction gas mixture comprising propene and oxygen and having a specific composition is oxidized in a first reaction stage over a first fixed catalyst bed having a volume-specific activity which is constant or increases in the flow direction and the acrolein-containing product gas mixture of the first reaction stage is subsequently oxidized in a second reaction stage over a second fixed catalyst bed having a volume-specific activity increasing in the flow direction, and the shaped catalyst bodies of both fixed catalyst beds are annular and each have a specific multimetal oxide composition.

    摘要翻译： 在非均相催化下在气相中将丙烯部分氧化为丙烯酸的方法中，包含丙烯和氧并具有特定组成的起始反应气体混合物在第一反应阶段在具有体积特异性的第一固定催化剂床上被氧化 随后在第二反应阶段，在流动方向上具有体积比活度增加的第二固定催化剂床上氧化第一反应段的流动方向恒定或增加的含丙烯醛的产物气体混合物的活性，以及 两个固定催化剂床的成形催化剂体是环状的，并且各自具有特定的多金属氧化物组合物。

    Method for the heterogeneously catalyzed partial gas phase oxidation of propene into acrylic acid
    5.
    发明申请
    Method for the heterogeneously catalyzed partial gas phase oxidation of propene into acrylic acid 审中-公开
    丙烯非均相催化部分气相氧化丙烯的方法

    公开(公告)号：US20060135813A1

    公开(公告)日：2006-06-22

    申请号：US10543060

    申请日：2004-03-20

    申请人： Martin Dieterle ,  Jochen Petzoldt ,  Klaus Muller-Engel ,  Hans Martan

    发明人： Martin Dieterle ,  Jochen Petzoldt ,  Klaus Muller-Engel ,  Hans Martan

    IPC分类号： C07C51/16

    CPC分类号： C07C51/252 ,  C07C57/04

    摘要： In a process for partially oxidizing propene to acrylic acid in the gas phase under heterogeneous catalysis, a starting reaction gas mixture comprising propene and oxygen and having a specific composition is oxidized in a first reaction stage over a first fixed catalyst bed having a volume-specific activity which is constant or increases in the flow direction and the acrolein-containing product gas mixture of the first reaction stage is subsequently oxidized in a second reaction stage over a second fixed catalyst bed having a volume-specific activity increasing in the flow direction, and the shaped catalyst bodies of both fixed catalyst beds are annular and each have a specific multimetal oxide composition.

    摘要翻译： 在非均相催化下在气相中将丙烯部分氧化为丙烯酸的方法中，包含丙烯和氧并具有特定组成的起始反应气体混合物在第一反应阶段在具有体积特异性的第一固定催化剂床上被氧化 随后在第二反应阶段，在流动方向上具有体积比活度增加的第二固定催化剂床上氧化第一反应段的流动方向恒定或增加的含丙烯醛的产物气体混合物的活性，以及 两个固定催化剂床的成形催化剂体是环状的，并且各自具有特定的多金属氧化物组合物。

    Process for preparing alkyl esters of (meth)acrylic acid
    9.
    发明申请
    Process for preparing alkyl esters of (meth)acrylic acid 审中-公开
    制备（甲基）丙烯酸的烷基酯的方法

    公开(公告)号：US20060205973A1

    公开(公告)日：2006-09-14

    申请号：US11358220

    申请日：2006-02-22

    申请人： Thorsten Habeck ,  Ulrich Rauh ,  Thorsten Friese ,  Hans Martan

    发明人： Thorsten Habeck ,  Ulrich Rauh ,  Thorsten Friese ,  Hans Martan

    IPC分类号： C07C67/36

    CPC分类号： C07C67/327 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

    摘要： A process is described for continuously preparing alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid and alkanols having from 1 to 5 carbon atoms in homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acidic esterification catalyst, in which the (meth)acrylic acid, the alkanol and the acidic esterification catalyst are fed to a reaction zone (5, 6), a reaction mixture (21) is discharged from the reaction zone (5, 6), and is introduced into a rectification unit I and separated by addition of water into a top stream (23), comprising the alkyl ester of (meth)acrylic acid, and a bottom stream (22), and a substream of the bottom stream (22) from the rectification unit I is fed to a residue dissociation unit IV, which comprises a dissociating boiler (61), and is separated therein into a top stream (29), which is recycled into the rectification unit I and a bottom stream (40), which is removed from the system, wherein the residue dissociation unit IV, as well as the dissociating boiler (61), further comprises a rectification column (62), the water content of the liquid obtained at the bottommost stage thereof being less than 0.1% by weight.

    摘要翻译： 描述了一种通过使（甲基）丙烯酸和具有1至5个碳原子的链烷醇在均相，液体，无溶剂相中在升高的温度和酸性存在下连续制备（甲基）丙烯酸的烷基酯的方法 酯化催化剂，其中将（甲基）丙烯酸，链烷醇和酸性酯化催化剂加入到反应区（5,6）中，将反应混合物（21）从反应区（5,6）排出， 被引入精馏单元I中，并通过加入包含（甲基）丙烯酸的烷基酯和底部流（22））的顶部流（23）和底部流（22）的分流而分离， 来自精馏单元I的残渣解离单元IV包含解离锅炉（61），并分离成顶部物流（29），其被再循环到精馏单元I和底部流（40）中， ，其从系统中移除，其中 残渣解离单元IV以及解离式锅炉（61）还包括精馏塔（62），其最底部得到的液体的含水量小于0.1重量％。

    Method for producing (meth)acrylic acid and (meth)acrylic acid esters
    10.
    发明授权
    Method for producing (meth)acrylic acid and (meth)acrylic acid esters 有权
    （甲基）丙烯酸和（甲基）丙烯酸酯的制备方法

    公开(公告)号：US06458989B1

    公开(公告)日：2002-10-01

    申请号：US09646126

    申请日：2000-09-28

    申请人： Heinrich Aichinger ,  Hans Martan ,  Gerhard Nestler

    发明人： Heinrich Aichinger ,  Hans Martan ,  Gerhard Nestler

    IPC分类号： C07C6748

    CPC分类号： C07C51/50 ,  B01D3/225 ,  C07C51/44 ,  C07C51/487 ,  C07C67/08 ,  C07C57/04 ,  C07C69/54

    摘要： A process for preparing pure (meth)acrylic acid or a (meth)acrylate starting from a crude (meth)acrylic acid, which comprises the following stages: A: treating the crude (meth)acrylic acid with at least one compound which is able to remove aldehydes, to give an aldehyde-free crude (meth)acrylic acid; B: subjecting the aldehyde-free crude (meth)acrylic acid to imprecise distillation, to give a low-boiling fraction comprising (meth)acrylic acid and acetic acid and a high-boiling fraction comprising (meth)acrylic acid and high boilers; C: isolating a pure (meth)acrylic acid from the high-boiling fraction and, if desired, D: esterifying the low-boiling fraction comprising (meth)acrylic acid and acetic acid that is obtained in stage B by means of one or more alkanols, to give an esterification mixture comprising one or more (meth)acrylates, one or more acetic esters, and one or more alkanols.

    摘要翻译： 一种从粗（甲基）丙烯酸开始制备纯（甲基）丙烯酸或（甲基）丙烯酸）的方法，其包括以下阶段：A：用至少一种能够 去除醛，得到无醛的粗（甲基）丙烯酸; B：使无醛粗（甲基）丙烯酸不精确地进行蒸馏，得到包含（甲基）丙烯酸和乙酸的低沸点馏分 以及包含（甲基）丙烯酸和高沸点剂的高沸点馏分; C：从高沸点馏分中分离出纯的（甲基）丙烯酸，如果需要，D：酯化包含（甲基）丙烯酸的低沸点馏分 通过一种或多种链烷醇在阶段B中获得的酸和乙酸，得到包含一种或多种（甲基）丙烯酸酯，一种或多种乙酸酯和一种或多种链烷醇的酯化混合物。