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公开(公告)号：US20010025120A1
公开(公告)日：2001-09-27
申请号：US09779205
申请日：2001-02-08
IPC分类号： C07C067/26
摘要： The present invention provides a production process for a hydroxyalkyl (meth)acrylate which process enables to maintain the oxygen concentration of a gas phase portion of a reactor within a specific low concentration range in any stage of before adding raw materials, during the reaction, and after the reaction. The production process comprises the step of carrying out a reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate, wherein an inert gas and/or a mixed gas of oxygen and an inert gas with a beforehand adjusted oxygen concentration of 0.1 to 14 vol % is used to maintain the oxygen concentration of a gas phase portion of a reactor in the range of 0.1 to 14 vol % (1) before adding the alkylene oxide or (2) during the above reaction or (3) between the completion of the above reaction and the charge for the next reaction. In addition, another production process comprises the step of carrying out a reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate, wherein the oxygen concentration of a gas phase portion of a reactor is maintained in the range of 0.1 to 14 vol % throughout the production steps.
摘要翻译： 本发明提供一种（甲基）丙烯酸羟烷基酯的制备方法，该方法能够在反应期间在添加原料之前的任何阶段将反应器的气相部分的氧浓度保持在特定的低浓度范围内，以及 反应后。 该制备方法包括在催化剂存在下进行（甲基）丙烯酸和烯化氧之间的反应以制备（甲基）丙烯酸羟烷基酯的步骤，其中惰性气体和/或氧气的混合气体 使用事先调节氧浓度为0.1〜14体积％的惰性气体，在加入环氧烷之前将反应器的气相部分的氧浓度维持在0.1〜14体积％（1）的范围内，或（ 2）在上述反应期间或（3）完成上述反应和下一反应的电荷之间。 此外，另一种制备方法包括在催化剂存在下进行（甲基）丙烯酸和烯化氧之间的反应以制备（甲基）丙烯酸羟烷基酯的步骤，其中气相部分的氧浓度 的反应器在整个生产步骤中保持在0.1至14体积％的范围内。
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公开(公告)号：US20020022739A1
公开(公告)日：2002-02-21
申请号：US09928574
申请日：2001-08-12
发明人： Hajime Matsumoto , Tetsuya Kajihara , Yasuhiro Shingai , Masatoshi Ueoka , Yukihiro Yoneda , Masahiro Uemura , Sei Nakahara , Fumio Munechika
IPC分类号： C07C069/54
摘要： The present invention provides a process for producing a (meth)acrylic ester which enables to obtain a (meth)acrylic ester in an excellent reaction yield. The process for producing a (meth)acrylic ester uses an alcohol and an acid as raw materials and an ion-exchange resin as a catalyst, and the process is characterized by comprising a dehydration step and an esterification step, wherein the esterification reaction step follows the dehydration step in which water impregnated in the ion-exchange resin is removed by using as a dehydrating solvent at least one member selected from the group consisting of the alcohol, the acid, and the resulting ester.
摘要翻译： 本发明提供一种能够以优异的反应收率得到（甲基）丙烯酸酯的（甲基）丙烯酸酯的制造方法。 制备（甲基）丙烯酸酯的方法以醇和酸为原料，以离子交换树脂为催化剂，其特征在于包括脱水步骤和酯化步骤，其中酯化反应步骤如下 通过使用选自醇，酸和所得酯中的至少一种作为脱水溶剂，除去浸渍在离子交换树脂中的水的脱水步骤。
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公开(公告)号：US20010005763A1
公开(公告)日：2001-06-28
申请号：US09735091
申请日：2000-12-12
IPC分类号： C07C051/16 , B01J019/00 , B01D003/02 , B01D003/14
CPC分类号： C07C51/252 , B01D3/225 , B01D3/322 , B01J19/02 , B01J2219/00101 , B01J2219/0277 , C07C51/44 , Y10S159/15 , C07C57/04
摘要： The present invention provides an apparatus for producing (meth)acrylic acid and a process for producing (meth)acrylic acid with this apparatus wherein the apparatus enables to produce (meth)acrylic acid stably for a long period of time by effectively inhibiting the polymerization of (meth)acrylic acid in its production process (for example, in a reboiler). At least a part of the apparatus is made of a nickel-chromium-iron alloy with a molybdenum content of 3 to 20 mass %, but not including 3 mass %, or with a molybdenum content of 1 to 4 mass % and a copper content of 0.5 to 7 mass %.
摘要翻译： 本发明提供一种用于生产（甲基）丙烯酸的装置和用于生产（甲基）丙烯酸的方法，该装置能够通过有效地抑制聚合反应而长时间稳定地制备（甲基）丙烯酸 （甲基）丙烯酸的制备方法（例如，在再沸器中）。 该装置的至少一部分由钼含量为3〜20质量％，但不包括3质量％，或者含有1〜4质量％的钼含量和铜含量的镍 - 铬 - 铁合金 为0.5〜7质量％。
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公开(公告)号：US20020189927A1
公开(公告)日：2002-12-19
申请号：US10226013
申请日：2002-08-22
发明人： Kazuhiko Sakamoto , Sei Nakahara , Masatoshi Ueoka , Naoto Kasaya
IPC分类号： B01D003/00 , C07C051/44
CPC分类号： C07C51/47 , B01D3/143 , B01D3/225 , B01D3/322 , C07C67/54 , Y10S159/901 , Y10S203/09 , Y10S203/11 , Y10S203/90 , C07C57/04 , C07C69/54
摘要： The present invention provides a column treating method by use of a distillation column and so on, which method enables to effectively remove solid impurities such as precipitates and polymers contained or produced in a treating fluid, and to thereby stably operate the column treatment. Solid impurities in a treating fluid can be removed by carrying out: step (a) of drawing out the treating fluid from a drawing out outlet (16) at the column bottom of the treatment column (10) outside the treatment column (10), step (b) of removing solid impurities from the treating fluid, drawn out in step (a), by a strainer (40), and step (c) of returning the treating fluid, from which the solid impurities are removed in step (b), to a returning inlet (18) of the treatment column, with advancing physical and/or chemical treatment of the treating fluid in the treatment column (10).
摘要翻译： 本发明提供了使用蒸馏塔等的柱处理方法，该方法能够有效地除去在处理液中含有或制造的析出物和聚合物等固体杂质，从而稳定地进行塔处理。 处理液中的固体杂质可以通过以下步骤来除去：步骤（a）从处理塔（10）外部的处理塔（10）的塔底处的拉出出口（16）抽出处理流体， 步骤（b）从步骤（a）中抽出的处理液中除去固体杂质，通过过滤器（40）和步骤（c）返回在步骤（b）中除去固体杂质的处理流体 ），经处理塔（10）中的处理流体的物理和/或化学处理的进行处理到处理塔的返回入口（18）。
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公开(公告)号：US20010006226A1
公开(公告)日：2001-07-05
申请号：US09728179
申请日：2000-12-01
IPC分类号： C08F020/18
摘要： To sufficiently stabilize a hydroxyalkyl (meth)acrylate in spite of its easily polymerizable property, a hydroxyalkyl saturated-carboxylate and/or alkylene glycol as well as a phenol compound is added thereto.
摘要翻译： 为了充分稳定（甲基）丙烯酸羟烷基酯，尽管其易于聚合的性质，可以向其中加入饱和羧酸羟烷基酯和/或亚烷基二醇以及酚化合物。
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公开(公告)号：US20010004960A1
公开(公告)日：2001-06-28
申请号：US09745896
申请日：2000-12-21
发明人： Yoshitake Ishii , Kouji Ueno , Kazuhiko Sakamoto , Sei Nakahara , Masatoshi Ueoka , Tetsuji Mitsumoto , Takeshi Nishimura , Mamoru Takamura , Hisao Nakama
IPC分类号： B01D003/34 , B01D003/42
CPC分类号： C07C51/44 , C07C51/487 , C07C57/04
摘要： The present invention provides an industrially easy and economical method for purification of acrylic acid which enables to efficiently eliminate impurities from a crude acrylic acid containing aldehydes as the impurities while the formation of acrylic acid polymer is inhibited. The method for purification of acrylic acid comprises the step of distilling a crude acrylic acid which is charged with an aldehyde treatment chemical, wherein the concentration ratio of furfural to acrolein by weight in the crude acrylic acid is adjusted so as to satisfy the following equation: (furfural concentration by weight)/(acrolein concentration by weight)null100.
摘要翻译： 本发明提供了一种工业上容易和经济的丙烯酸纯化方法，其能够在抑制丙烯酸聚合物形成的同时，有效地除去含粗醛的丙烯酸作为杂质的杂质。 纯化丙烯酸的方法包括蒸馏装入醛处理化学品的粗丙烯酸的步骤，其中调整粗丙烯酸中糠醛与丙烯醛的重量比，以满足下列等式： （糠醛浓度重量）/（丙烯醛浓度按重量计）<= 100。
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