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    • 1. 发明申请
    • 気相接触酸化方法および(メタ)アクロレイン又は(メタ)アクリル酸の製造方法
    • 蒸气相催化氧化方法及生产(甲基)丙烯酸或(甲基)丙烯酸的方法
    • WO2003055835A1
    • 2003-07-10
    • PCT/JP2002/013608
    • 2002-12-26
    • 三菱化学株式会社矢田 修平小川 寧之鈴木 芳郎保坂 浩親神野 公克斉藤 輝雄
    • 矢田 修平小川 寧之鈴木 芳郎保坂 浩親神野 公克斉藤 輝雄
    • C07C45/35
    • C07C51/215C07C45/33C07C45/35C07C51/252C07C47/22C07C57/04
    • A process for vapor-phase catalytic oxidation by feeding a gaseous raw material into a fixed-bed multi-pipe reactor comprising reaction pipes filled with catalysts, wherein two or more catalyst layers different in activity are placed in each reaction pipe in a state stratified in the reaction direction and the catalyst layer nearest to the port of feeding the gaseous raw material has a higher catalytic activity than that of the next catalyst layer adjacent thereto; and a process for production of (meth)acrolein or (meth)acrylic acid by vapor -phase catalytic oxidation of a raw material for production of (meth)acrolein or (meth)acrylic acid with molecular oxygen or a gas containing molecular oxygen in a fixed-bed multi-pipe reactor comprising reaction pipes each containing two or more catalyst layers placed in the axial direction, wherein the difference between the maximum and minimum reaction peak temperatures of each catalyst layer in the pipe-axial direction is controlled to be 20 °C or below. According to these processes, the occurrence of hot spots can be efficiently inhibited.
    • 一种通过将气态原料进料到固定床多管反应器中的气相催化氧化方法,其包括填充有催化剂的反应管,其中活性不同的两个或更多个催化剂层以分层的状态放置在每个反应管中 反应方向和最靠近进料气态原料的催化剂层具有比与其相邻的下一个催化剂层更高的催化活性; 以及通过气相催化氧化生成(甲基)丙烯醛或(甲基)丙烯酸的方法和(甲基)丙烯醛或(甲基)丙烯酸与分子氧或包含分子氧的气体在 固定床多管反应器,其包含反应管,每个反应管包含沿轴向设置的两个或更多个催化剂层,其中每个催化剂层在管轴方向上的最大和最小反应峰值温度之间的差被控制在20° C或以下。 根据这些方法,可以有效地抑制热点的发生。
    • 4. 发明申请
    • 多管式反応器を用いた気相接触酸化方法
    • 使用多重反应器的蒸气相催化氧化方法
    • WO2004018403A1
    • 2004-03-04
    • PCT/JP2003/010600
    • 2003-08-21
    • 三菱化学株式会社矢田 修平保坂 浩親神野 公克
    • 矢田 修平保坂 浩親神野 公克
    • C07C51/21
    • C07C51/215B01J8/067B01J2208/00212B01J2208/00221B01J2208/0023C07C45/33C07C45/35C07C51/00C07C51/252C07C47/22C07C57/04
    • A method of vapor phase catalytic oxidation that is capable of effectively removing heat of reaction, preventing occurrence of hot spots and efficiently obtaining a desired product. In particular, a method of performing a vapor phase catalytic oxidation of substance to be oxidized with a gas containing molecular oxygen by means of a multitubular reactor, the multitubular reactor comprising a cylindrical reactor shell fitted with a raw material supply port and a product outlet; multiple circular conduits disposed around the cylindrical reactor shell and used to introduce heat medium into the cylindrical reactor shell or to lead heat medium out therefrom; a circulation device for connecting the multiple circular conduits to each other; multiple reaction tubes restrained by means of multiple tube plates of the reactor and having a catalyst accommodated therein; and multiple baffles arranged in the longitudinal direction of the reaction tube and used to change the direction of heat medium introduced in the reactor shell. In this method, the vapor phase catalytic oxidation is carried out under such conditions that the heat transfer coefficient of heat medium is 1000 W/(m .K) or higher.
    • 一种气相催化氧化方法,其能够有效地除去反应热,防止发生热点并有效地获得所需产物。 具体而言,一种通过多管式反应器对含有分子氧气体进行氧化的物质进行气相催化氧化的方法,该多管式反应器包括装配有原料供给口和产品出口的圆柱形反应器壳体; 多个圆形管道设置在圆柱形反应器壳体周围,用于将热介质引入圆柱形反应器壳体或从其中引出热介质; 用于将多个圆形导管彼此连接的循环装置; 多个反应管通过反应器的多个管板约束并具有容纳在其中的催化剂; 以及沿反应管的纵向布置的多个挡板,用于改变引入反应器壳体的热介质的方向。 在该方法中,气相催化氧化在热介质的传热系数为1000W /(m 2·K)以上)的条件下进行。