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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。
    • 16. 发明申请
    • Method For Manufacturing Catalyst From Recovered Catalyst
    • 从回收催化剂制备催化剂的方法
    • US20120329638A1
    • 2012-12-27
    • US13582055
    • 2011-03-28
    • Tatsuhiko KurakamiTakayuki IijimaTomoaki KobayashiToshitake Kojima
    • Tatsuhiko KurakamiTakayuki IijimaTomoaki KobayashiToshitake Kojima
    • B01J27/28
    • C07C51/235B01J27/199B01J27/285B01J35/023B01J37/0009B01J37/0045B01J38/68C07C51/252Y02P20/584C07C57/04
    • The present invention relates to a method for manufacturing a regenerated catalyst from a recovered catalyst from manufacturing process or a used catalyst of a heteropoly acid-based catalyst containing molybdenum, phosphorus, vanadium or copper as an essential component by the below-described Process a to Process f: Process a: a solution A is prepared by mixing a substance M with an aqueous solvent and removing a component insoluble in the solvent; Process b: the molar quantity of at least one component of molybdenum, phosphorus, vanadium or copper contained in the solution A is measured; Process c: an aqueous hydrogen peroxide solution is added to the solution A to obtain a solution B; Process d: the difference between the content obtained in Process b and the theoretical value of a required element is determined and the shortage amount of the catalyst component is added to the solution B to prepare a solution C; Process e: the solution C is dried to prepare catalyst granules D; and Process f: the catalyst granules D are molded and subsequently calcined to prepare a molded catalyst E, the manufacturing method is also simple, and the obtained said regenerated catalyst has performance equivalent to an unused target catalyst, leading to a large advantage that it can be used as it is in combination with an unused target catalyst.
    • 本发明涉及一种从制造方法回收的催化剂制造再生催化剂的方法或通过下述方法a至于含有钼,磷,钒或铜作为必要成分的杂多酸系催化剂的使用催化剂 方法f:处理a:通过将物质M与水性溶剂混合并除去不溶于溶剂的组分来制备溶液A; 方法b:测量溶液A中所含的钼,磷,钒或铜的至少一种组分的摩尔量; 方法c:向溶液A中加入过氧化氢水溶液以获得溶液B; 方法d:确定方法b中获得的含量与所需要元素的理论值之间的差异,并将催化剂组分的不足量加入到溶液B中以制备溶液C; 方法e:将溶液C干燥以制备催化剂颗粒D; 和方法f:将催化剂颗粒D模塑并随后煅烧以制备模制催化剂E,制备方法也简单,所得到的所述再生催化剂具有与未使用的目标催化剂相当的性能,导致其可以 可以与未使用的目标催化剂组合使用。