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    • 1. 发明授权
    • Method for producing methacrylic acid
    • 生产甲基丙烯酸的方法
    • US07304179B2
    • 2007-12-04
    • US10569371
    • 2004-08-27
    • Tomomichi HinoAkira Ogawa
    • Tomomichi HinoAkira Ogawa
    • C07C51/16
    • C07C51/252C07C57/04
    • The present invention provides a method for producing methacrylic acid through gas-phase catalytic oxidation of methacrolein or a methacrolein-containing gas with molecular oxygen or a gas containing molecular oxygen by the use of a fixed-bed multitubular reactor comprising a plurality of reaction tubes each having a catalyst layer therein, wherein the above catalyst layer is divided in the direction of the tube axis of a reaction tube into two or more layers, to thereby provide a plurality of reaction zones, and the catalyst is caused to be present in the catalyst layer in such a way that a reaction load ratio CRc(i) per unit mass of the catalyst in each reaction zone becomes 0.8 to 1.0.
    • 本发明提供了一种通过使用固定床多管反应器通过气相催化氧化甲基丙烯醛或含有异丁烯醛的气体与分子氧或含分子氧的气体来生产甲基丙烯酸的方法,所述固定床多管反应器包括多个反应管 在其中具有催化剂层,其中将上述催化剂层沿反应管的管轴方向分成两层或更多层,从而提供多个反应区,并且催化剂存在于催化剂中 层,使得各反应区域中的催化剂的每单位质量的反应负荷比CRc(i)为0.8〜1.0。
    • 2. 发明授权
    • Vertical multitubular heat exchanger and distillation column system including the same
    • 立式多管式换热器和蒸馏塔系统包括相同
    • US07462262B2
    • 2008-12-09
    • US10919293
    • 2004-08-17
    • Tomomichi HinoAkira OgawaShigetoshi ShimauchiToshihiro SatoYasuhiro Kabu
    • Tomomichi HinoAkira OgawaShigetoshi ShimauchiToshihiro SatoYasuhiro Kabu
    • B01D3/04F28F9/02F28D7/16
    • F28F9/02B01D1/06B01D3/322F28F9/18
    • A vertical multitubular heat exchanger that can prevent clogging of a polymerized material and is continuously operable for an extended period of time is provided. The vertical multitubular heat exchanger (1) of the present invention introduces a process fluid containing an easily-polymerizable substance into heat exchanger tubes (28) to perform heat exchange. The vertical multitubular heat exchanger (1) includes a shell (2) extending in a vertical direction, an upper tube sheet (8) and a lower tube sheet (10) respectively disposed at the upper portion (4) and the lower portion (6) of the shell (2), and a plurality of heat exchanger tubes (28) whose outer circumferences (26) of both ends are respectively fixed to the upper tube sheet (8) and the lower tube sheet (10). An upper surface (34) of the upper tube sheet (8) is formed to be sloped and at least one of the heat exchanger tubes (28) is disposed in the vicinity of the lowest position of the upper surface (34) of the upper tube sheet (8).
    • 提供了可以防止聚合材料堵塞并且可延长连续可操作的垂直多管式热交换器。 本发明的立式多管式热交换器(1)将含有易聚合物质的工艺流体引入热交换器管(28)进行热交换。 垂直多管式热交换器(1)包括沿垂直方向延伸的壳体(2),分别设置在上部分(4)和下部分(6)处的上管板(8)和下管板(10) )和两个外周(26)分别固定在上管板(8)和下管板(10)上的多个热交换器管(28)。 上管板(8)的上表面(34)形成为倾斜的,并且至少一个热交换器管(28)设置在上管(28)的上表面(34)的最下位置附近 管板(8)。
    • 3. 发明申请
    • Method for producing methacrylic acid
    • 生产甲基丙烯酸的方法
    • US20060264668A1
    • 2006-11-23
    • US10569371
    • 2004-08-27
    • Tomomichi HinoAkira Ogawa
    • Tomomichi HinoAkira Ogawa
    • C07C51/16G06F19/00
    • C07C51/252C07C57/04
    • The present invention provides a method for producing methacrylic acid through gas-phase catalytic oxidation of methacrolein or a methacrolein-containing gas with molecular oxygen or a gas containing molecular oxygen by the use of a fixed-bed multitubular reactor comprising a plurality of reaction tubes each having a catalyst layer therein, wherein the above catalyst layer is divided in the direction of the tube axis of a reaction tube into two or more layers, to thereby provide a plurality of reaction zones, and the catalyst is caused to be present in the catalyst layer in such a way that a reaction load ratio CRc(i) per unit mass of the catalyst in each reaction zone becomes 0.8 to 1.0.
    • 本发明提供了一种通过使用固定床多管反应器通过气相催化氧化甲基丙烯醛或含有异丁烯醛的气体与分子氧或含分子氧的气体来生产甲基丙烯酸的方法,所述固定床多管反应器包括多个反应管 在其中具有催化剂层,其中将上述催化剂层沿反应管的管轴方向分成两层或更多层,从而提供多个反应区,并且催化剂存在于催化剂中 层,使得各反应区域中的催化剂的每单位质量的反应负荷比CRc(i)为0.8〜1.0。