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    • 12. 发明申请
    • Process For Producing Unsaturated Aldehyde And/or Unsaturated Carboxylic Acid
    • 生产不饱和醛和/或不饱和羧酸的方法
    • US20130310604A1
    • 2013-11-21
    • US13982808
    • 2012-01-16
    • Tatsuhiko KurakamiSusumu MatsumotoAtsushi SudoKazuo ShiraishiMasashi Hashiba
    • Tatsuhiko KurakamiSusumu MatsumotoAtsushi SudoKazuo ShiraishiMasashi Hashiba
    • C07C51/25C07C45/38C07C51/235C07C45/35
    • C07C51/235C07C45/35C07C45/38C07C51/252C07C47/22C07C57/04
    • There is provided a process for producing aerolein, acrylic acid, methacrolein, methacrylic acid in a safe and steady manner and in high yields, which avoids a phenomenon of occurrence of an abnormal reaction attributable to the fact that the temperature at a raw material gas outlet side becomes considerably higher than the temperature at a raw material gas inlet side, with regard to the temperature of a catalyst packed in a reaction tube at vapor-phase catalytic oxidation of propylene, isobutylene, or the like.In the process of using a reaction tube on which a plurality of catalyst layers formed in a raw material gas flow direction, a catalyst and a catalyst packing schedule are designed so that a relation between the raw material conversion rate at which the yield of the objective product becomes maximum and the raw material conversion rate at which a high and low correlation between maximum temperature of the catalyst layer present closest to a reaction gas inlet side Zin and maximum temperature of the catalyst layer present closest to a reaction gas outlet side Zout is reversed satisfies a specific condition of 0.5≦Cmax−Ccrs≦5, in which Cmax: a raw material conversion rate at which yield of the objective products becomes maximum; and Ccrs: a raw material conversion rate at which, when maximum temperature of the catalyst layer Zin is regarded as Tin, maximum temperature of the catalyst layer Zout is regarded as Tout, and the raw material conversion rate is changed, a high and low correlation between Tin and Tout is reversed.
    • 提供了以安全稳定的方式和高产率生产气溶胶,丙烯酸,甲基丙烯醛,甲基丙烯酸的方法,避免了由于原料气体出口处的温度导致的异常反应的发生现象 相对于在丙烯,异丁烯等的气相催化氧化反应管中填充的催化剂的温度,原料气体入口侧的温度显着高于原料气体入口侧的温度。 在使用在原料气体流动方向上形成有多个催化剂层的反应管的过程中,设计催化剂和催化剂填充进度,使得目的物的产率的原料转化率之间的关系 产物变得最大,并且最接近反应气体入口侧的催化剂层的最高温度和最接近反应气体出口侧的催化剂层的最高温度之间的高低相关性的原料转化率反转 满足0.5 @ Cmax-Ccrs @ 5的特定条件,其中Cmax:目标产物的产率变为最大的原料转化率; Ccrs:将催化剂层Zin的最高温度设为Tin时的原料转化率,将催化剂层Zout的最高温度设为Tout,将原料转化率变更为高,低相关 Tin和Tout之间是相反的。
    • 17. 发明申请
    • Process for producing catalyst for methacrylic acid production
    • 生产甲基丙烯酸催化剂的方法
    • US20070010394A1
    • 2007-01-11
    • US10558501
    • 2004-05-27
    • Sudo AtsushiYoshimasa SeoTatsuhiko Kurakami
    • Sudo AtsushiYoshimasa SeoTatsuhiko Kurakami
    • B01J27/24
    • C07C51/235B01J23/002B01J27/199B01J37/0219B01J37/0236B01J2523/00C07C51/252C07C51/377C07C57/04B01J2523/15B01J2523/50B01J2523/51B01J2523/53B01J2523/55B01J2523/68B01J2523/17
    • The object of the present invention is to provide a method for preparing a catalyst for producing methacrylic acid by subjecting methacrolein, isobutyl aldehyde or isobutyric acid to gas phase catalytic oxidation with high yield and high selectivity. A method for preparing a catalyst for producing methacrylic acid by subjecting methacrolein, isobutyl aldehyde or isobutyric acid to gas phase catalytic oxidation, the method comprising: (a) a step of blending compounds each containing any one of Mo, V, P, Cu, Cs or NH4 with water to prepare an aqueous solution or dispersion of the compounds (hereinafter referred to, both included, as a slurry); (b) a step of drying the slurry obtained in the step (a) to obtain a dried slurry; (c) a step of calcining the dried slurry obtained in..the step (b) to obtain a calcined body; (d) a step of filtering a mixture obtained by blending the calcined body obtained in the step (c) with water to separate an aqueous solution and water-insoluble matter; and (e) a step of drying the water-insoluble matter obtained in the step (d) to obtain a dried water-insoluble body.
    • 本发明的目的是提供一种通过以高产率和高选择性将甲基丙烯醛,异丁醛或异丁酸进行气相催化氧化来制备用于生产甲基丙烯酸的催化剂的方法。 一种通过使甲基丙烯醛,异丁醛或异丁酸进行气相催化氧化来制备甲基丙烯酸的催化剂的方法,所述方法包括:(a)将各自含有Mo,V,P,Cu, Cs或NH 4与水反应以制备化合物的水溶液或分散体(以下称为两者,均为浆料); (b)干燥步骤(a)中获得的浆料以获得干燥的浆料的步骤; (c)煅烧步骤(b)中获得的干燥浆料以获得煅烧体的步骤; (d)将通过将步骤(c)中获得的煅烧体与水混合而获得的混合物与水分离以分离水溶液和水不溶性物质的步骤; 和(e)干燥步骤(d)中获得的水不溶性物质以获得干燥的水不溶性体的步骤。