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    • 1. 发明授权
    • Method of producing unsaturated acid from olefin
    • 从烯烃生产不饱和酸的方法
    • US07816559B2
    • 2010-10-19
    • US11378438
    • 2006-03-17
    • Boo Gon WooJun Seok KoKyoung Su HaSeong Pil KangSeok Hwan ChoiYoung Bae Kim
    • Boo Gon WooJun Seok KoKyoung Su HaSeong Pil KangSeok Hwan ChoiYoung Bae Kim
    • C07C51/16
    • B01J8/067B01J2208/00212B01J2208/025C07C51/215C07C51/252C07C57/04
    • 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.
    • 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的活性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。
    • 6. 发明授权
    • Method for producing (meth) acrylic acid
    • (甲基)丙烯酸的制造方法
    • US07632968B2
    • 2009-12-15
    • US11192223
    • 2005-07-28
    • Seong Pil KangSeok Hwan ChoiKyoung Su HaJun Seok KoYoung Bae KimBoo Gon WooMin Jeong Park
    • Seong Pil KangSeok Hwan ChoiKyoung Su HaJun Seok KoYoung Bae KimBoo Gon WooMin Jeong Park
    • C07C51/42
    • C07C51/44C07C51/48C07C57/04
    • 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.
    • 公开了一种制备(甲基)丙烯酸的方法,包括从(甲基)丙烯酸水溶液中回收(甲基)丙烯酸作为(甲基)丙烯酸水溶液的方法,所述方法至少由 一种选自丙烷,丙烯,异丁烯和(甲基)丙烯醛的反应物,其中回收方法包括以下步骤:(1)将含(甲基)丙烯酸的气体混合物进料到淬火塔中并将其冷凝 淬火塔,以从骤冷塔的底部回收(甲基)丙烯酸水溶液,其中一些回收的(甲基)丙烯酸水溶液被循环到淬火塔的上部以冷凝 (甲基)丙烯酸气体混合物; (2)使来自(甲基)丙烯酸的气体混合物的未冷凝的部分从淬火塔的顶部通到蒸馏塔; 和(3)加热蒸馏塔的底部以将含水的杂质组分与未冷凝(甲基)丙烯酸的气体混合物分离并从蒸馏塔的顶部排出。 还公开了用于执行该方法的系统。
    • 9. 发明授权
    • Method of producing unsaturated aldehyde and unsaturated acid in fixed-bed catalytic partial oxidation reactor with enhanced heat control system
    • 固定床催化部分氧化反应器中增强热控系统的不饱和醛和不饱和酸的生产方法
    • US07238836B2
    • 2007-07-03
    • US10931034
    • 2004-09-01
    • Kyoung Su HaGeon Yong KimSeong Pil KangSeok Hwan ChoiBoo Gon Woo
    • Kyoung Su HaGeon Yong KimSeong Pil KangSeok Hwan ChoiBoo Gon Woo
    • C07C51/16C07C45/35B01J8/04
    • C07C51/252C07C57/04
    • The present invention provides a process of producing unsaturated aldehydes and unsaturated acids from olefins by fixed-bed catalytic partial oxidation in a shell-and-tube heat exchanger-type reactor. In this process, the reactor comprises a first-step reaction zone of mainly producing the unsaturated aldehydes, a second-step reaction zone of mainly producing the unsaturated acids, or both the two zones. The first-step reaction zone is divided into two or more zones by a partition. Each of the divided shell spaces is filled with a heat transfer medium, and the heat transfer medium in each shell space is maintained at isothermal temperature or a temperature difference of 0-5° C. The temperatures of the heat transfer media in each of the divided shell spaces are set to increase in the moving direction of reactants. In order to facilitate the removal of heat generation at a location where the partition is placed, a reaction inhibition layer is disposed in the first-step reaction zone. Also, in order to protect the catalyst layer from a highly exothermic reaction, the process is performed at a limited temperature difference between the temperature in a hot spot and the temperature of a molten salt. If the improved heat control system according to the present invention is used, the heat stability of the catalyst layer will be secured and the yields of intermediate and final products can be increased.
    • 本发明提供了一种在壳管式热交换器型反应器中通过固定床催化部分氧化从烯烃生产不饱和醛和不饱和酸的方法。 在该方法中,反应器包括主要产生不饱和醛的第一步反应区,主要产生不饱和酸的第二步反应区或两个区。 第一步反应区通过隔板分成两个或多个区域。 每个分隔的壳体空间填充有传热介质,并且每个壳体空间中的传热介质保持在等温温度或0-5℃的温差。传热介质的温度 分开的壳体空间被设置为在反应物的移动方向上增加。 为了便于在放置隔板的位置除去发热,反应抑制层设置在第一步反应区中。 此外,为了保护催化剂层免受高度放热的反应,该过程在热点温度与熔融盐的温度之间的有限温度差下进行。 如果使用根据本发明的改进的热控制系统,则将确保催化剂层的热稳定性,并且可以提高中间产品和最终产品的产率。