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公开(公告)号：US20060284723A1
公开(公告)日：2006-12-21
申请号：US11453117
申请日：2006-06-14
IPC分类号： H01C3/04
摘要： Disclosed is a temperature measuring device. The temperature measuring device includes: a thermo-well tube; and a cable or wire type temperature measuring means which is installed in a thermo-well tube, wherein temperature measuring means has temperature detecting sensors disposed at an intermediate portion thereof, and the temperature detecting sensors can be moved axially in the thermo-well tube by applying tension to both ends of the cable or wire type temperature measuring means. The present invention also provides a reaction tube in which the temperature measuring device is disposed axially, and a reactor including at least one temperature measuring device or reaction tube as described above.
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公开(公告)号：US20060025629A1
公开(公告)日：2006-02-02
申请号：US11192223
申请日：2005-07-28
IPC分类号： C07C51/42
摘要： Disclosed is a method for producing (meth)acrylic acid comprising a process of recovering (meth)acrylic acid as aqueous (meth)acrylic acid solution from a (meth)acrylic acid-containing gas mixture produced by the catalytic gas phase oxidation of at least one reactant selected from the group consisting of propane, propylene, isobutylene and (meth)acrolein, wherein the recovering process comprises the steps of: (1) feeding the (meth)acrylic acid-containing gas mixture into a quenching tower and condensing it in the quenching tower so as to recover an aqueous (meth)acrylic acid solution from the bottom of the quenching tower, in which some of the recovered aqueous (meth)acrylic acid solution is recycled to the upper portion of the quenching tower so as to condense the (meth)acrylic acid-containing gas mixture; (2) passing the uncondensed part of the (meth)acrylic acid-containing gas mixture from the top of the quenching tower to a distillation tower; and (3) heating the bottom of the distillation tower to separate water-containing impurity components from the uncondensed (meth)acrylic acid-containing gas mixture and to discharge them from the top of the distillation tower. A system used for carrying out the method is also disclosed.
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3.发明申请Method of producing unsaturated acid in fixed-bed catalytic partial oxidation reactor with high efficiency 有权固定床催化部分氧化反应器高效生产不饱和酸的方法公开(公告)号：US20070073084A1
公开(公告)日：2007-03-29
申请号：US11483752
申请日：2006-07-10
IPC分类号： B01J8/04 , C07C51/16 , C07C51/235
CPC分类号： C07C45/34 , B01J8/0453 , B01J8/0457 , B01J8/067 , B01J2208/00212 , B01J2208/0053 , B01J2208/025 , B01J2219/0004 , C07C45/35 , C07C45/36 , C07C45/37 , C07C51/215 , C07C51/252 , C07C47/21 , C07C47/22 , C07C57/04
摘要： Disclosed is a process for producing unsaturated aldehydes and/or unsaturated acids from olefins or alkanes in a fixed bed shell-and-tube heat exchanger-type reactor by catalytic vapor phase oxidation. A heat exchanger-type reactor for use in such a process is also disclosed. In the process, at least one of the first-step reaction zone and the second-step reaction zone is divided into two or more shell spaces by at least one partition; each of the divided shell spaces is independently heat-controlled; a heat transfer medium in the first shell space of the first-step reaction zone or the first shell space of the second-step reaction zone has a temperature ranging from the lowest active temperature of a catalyst layer packed in a reaction tube corresponding to the first shell space of the first-step reaction zone or the first shell space of the second-step reaction zone to [the lowest active temperature+20° C.], when referring to the two or more shell spaces corresponding to the first-step reaction zone sequentially as the first shell space of the first-step reaction zone, the second shell space of the first-step reaction zone, . . . , the nth shell space of the first-step reaction zone, and the two or more shell spaces corresponding to the second-step reaction zone sequentially as the first shell space of the second-step reaction zone, the second shell space of the second-step reaction zone, . . . , the nth shell space of the second-step reaction zone; and the first shell space of the first-step reaction zone or the first shell space of the second-step reaction zone is controlled in such a manner that the first shell space provides a reactant conversion contribution per length as defined in Equation 1 or 2 of 1.2˜2.5.
摘要翻译： 公开了一种通过催化气相氧化在固定床管壳式热交换器型反应器中由烯烃或烷烃生产不饱和醛和/或不饱和酸的方法。 还公开了一种用于这种方法的热交换器型反应器。 在该过程中，至少一个第一步骤反应区和第二步反应区被至少一个隔板分成两个或多个壳层空间; 每个分开的壳空间是独立的热控制的; 在第一步骤反应区的第一壳体空间或第二阶段反应区的第一壳体空间中的传热介质的温度范围从填充在对应于第一步骤的反应管的反应管中的催化剂层的最低活性温度 当提及对应于第一步反应的两个或多个壳层空间时，第一步反应区的壳体空间或第二步反应区的第一壳空间为[最低活性温度+ 20℃] 作为第一步反应区的第一壳空间，第一步反应区的第二壳空间。 。 。 ，第一步反应区的第n个第<！ - SIPO
- >壳空间，以及对应于第二步反应区的两个或多个壳层空间依次作为第二步反应区的第一壳空间， 第二步反应区的第二个壳体空间。 。 。 ，第二步反应区的第n个壳空间; 并且以这样的方式控制第一步骤反应区或第二阶段反应区的第一壳层空间的第一壳层空间，使得第一壳空间提供如式1或2中定义的每个长度的反应物转化贡献 1.2〜2.5。 -
公开(公告)号：US20060211884A1
公开(公告)日：2006-09-21
申请号：US11378438
申请日：2006-03-17
IPC分类号： C07C51/16 , C07C51/235
CPC分类号： B01J8/067 , B01J2208/00212 , B01J2208/025 , C07C51/215 , C07C51/252 , C07C57/04
摘要： Disclosed is a shell-and-tube heat exchanger type reactor that can be used for a process of producing unsaturated acids from olefins via fixed-bed catalytic partial oxidation, which comprises at least one reaction tube, each including at least one first-step catalyst layer, in which olefins are oxidized by a first-step catalyst to mainly produce unsaturated aldehydes, and at least two second-step catalyst layers, in which the unsaturated aldehydes are oxidized by a second-step catalyst to produce unsaturated acids, wherein a first catalyst layer of the second-step catalyst layers, disposed right adjacent to the first-step catalyst layer, has an activity corresponding to 5˜30% of the activity of the catalyst layer having a highest activity among the second-step catalyst layers. A method of producing unsaturated acids from olefins by using the reactor is also disclosed.
摘要翻译： 公开了一种壳管式热交换器型反应器，其可用于通过固定床催化部分氧化由烯烃生产不饱和酸的方法，其包括至少一个反应管，每个反应管包含至少一个第一步催化剂 层，其中烯烃被第一步催化剂氧化以主要产生不饱和醛，以及至少两个第二步催化剂层，其中不饱和醛被第二步催化剂氧化以产生不饱和酸，其中第一 与第一级催化剂层相邻设置的第二级催化剂层的催化剂层具有相当于第二级催化剂层中活性最高的催化剂层的活性的5〜30％的活性。 还公开了通过使用反应器由烯烃生产不饱和酸的方法。
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公开(公告)号：US20050245763A1
公开(公告)日：2005-11-03
申请号：US11116367
申请日：2005-04-28
IPC分类号： C07C51/42 , C07C51/44 , C07C51/487
CPC分类号： C07C51/44 , B01J2219/00006 , C07C51/487 , C07C57/04
摘要： Disclosed is a simplified method for recovering acrylic acid from a mixture containing acrylic acid, acrylic acid dimer and impurities with high boiling point, in a stable and efficient manner. The method comprises the steps of: introducing the mixture into an acrylic acid recovering device comprising an acrylic distillation unit integrated with an acrylic acid dimer pyrolysis tank; carrying out decomposition of acrylic acid dimmer under reduced pressure and recovering acrylic acid. The method optionally further comprises a step of recycling a portion of the solution obtained from the bottom of the acrylic acid recovering device to the acrylic acid recovering device.
摘要翻译： 公开了一种以稳定且有效的方式从含有丙烯酸，丙烯酸二聚物和高沸点杂质的混合物中回收丙烯酸的简化方法。 该方法包括以下步骤：将混合物引入丙烯酸回收装置中，该装置包括与丙烯酸二聚物热解罐结合的丙烯酸蒸馏装置; 在减压下进行丙烯酸二聚体的分解并回收丙烯酸。 所述方法还包括将从丙烯酸回收装置的底部获得的溶液的一部分再循环到丙烯酸回收装置的步骤。
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