Method for producing platinum metal catalysts
    3.
    发明授权
    Method for producing platinum metal catalysts 失效
    铂金属催化剂的制备方法

    公开(公告)号:US06676919B1

    公开(公告)日:2004-01-13

    申请号:US09926274

    申请日:2001-10-04

    IPC分类号: C01B1501

    摘要: The invention relates to a method for producing catalysts by immersion coating a metallic support with at least one platinum metal. An aqueous medium which comprises at least one platinum metal complex, at least one reduction agent and at least one complexer and which has a pH value of more than 4 is brought into contact with the metallic support in order to deposit the platinum metal, the platinum metal being deposited in the form of discreet, immobilised particles. The invention also relates to the catalysts obtained using this method and to their use for producing hydrogen peroxide and for hydrogenating organic compounds.

    摘要翻译: 本发明涉及通过用至少一种铂金浸渍涂覆金属载体来制备催化剂的方法。 包含至少一种铂金属络合物,至少一种还原剂和至少一种络合器并且pH值大于4的水性介质与金属载体接触以沉积铂金属,铂 金属以谨慎的,固定的颗粒的形式沉积。 本发明还涉及使用该方法获得的催化剂及其用于生产过氧化氢和用于氢化有机化合物的用途。

    Highly pure aqueous hydrogen peroxide solutions, method for producing same and their use
    4.
    发明授权
    Highly pure aqueous hydrogen peroxide solutions, method for producing same and their use 失效
    高纯度过氧化氢水溶液,其制备方法及其用途

    公开(公告)号:US06592840B1

    公开(公告)日:2003-07-15

    申请号:US09673247

    申请日:2000-10-23

    IPC分类号: C01B1501

    摘要: Disclosed are a highly pure aqueous hydrogen peroxide solution for use in the electronics industry and a process for the preparation of such solutions, which are essentially free from organics, which comprises catalytically converting hydrogen and oxygen, electrochemically reducing oxygen or electrolyzing an acidic ammonium sulfate solution, in each case in water and with the exclusion of organic compounds and materials which release such compounds.

    摘要翻译: 公开了一种用于电子工业的高纯度过氧化氢水溶液,以及制备基本上不含有机物的溶液的方法,该方法包括催化转化氢和氧,电化学还原氧或电解酸性硫酸铵溶液 在每种情况下都是在水中,排除释放这些化合物的有机化合物和材料。

    Structured packing for heat exchange and mass transfer
    5.
    发明授权
    Structured packing for heat exchange and mass transfer 失效
    用于热交换和传质的结构填料

    公开(公告)号:US06427985B1

    公开(公告)日:2002-08-06

    申请号:US09625486

    申请日:2000-07-25

    IPC分类号: B01F304

    摘要: A structured packing for heat exchange and mass transfer between a liquid and a gas in a column having at least one packing layer with a first, lower end and a second, upper end is described, the packing layer having an internal geometry which varies over its height so that by suitably setting the liquid and gas flow rates in a first, in particular lower, region of the packing layer a bubbling layer having a predominantly disperse gas phase forms in a targeted manner and simultaneously in a second, in particular upper, region of the packing layer a film flow of the liquid having a predominantly continuous gas phase forms in a targeted manner.

    摘要翻译: 描述了一种用于在具有至少一个具有第一,下端和第二上端的填料层的塔中的液体和气体之间的热交换和质量传递的规整填料,所述填料层具有内部几何形状 高度,使得通过适当地将液体和气体流速设定在填料层的第一个,特别是较低的区域中,具有主要分散气相的起泡层以目标方式形成,同时在第二特别是上部区域 的填料层,以目标的方式形成具有主要连续气相的液体的膜流。

    Method for separating trioxane from a mixture containing trioxane, formaldehyde and water
    10.
    发明申请
    Method for separating trioxane from a mixture containing trioxane, formaldehyde and water 审中-公开
    从含有三恶烷,甲醛和水的混合物中分离三恶烷的方法

    公开(公告)号:US20070155972A1

    公开(公告)日:2007-07-05

    申请号:US10583696

    申请日:2004-12-21

    IPC分类号: C07D305/12 C07C41/03

    摘要: A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.

    摘要翻译: 一种从甲醛,三恶烷和水的混合物I中除去三恶烷的方法,通过以下步骤a)在0.1至2巴的压力下在第一蒸馏阶段中蒸馏混合物I以获得包含甲醛和流III的流II 主要包含三恶烷,另外还含有水和甲醛,b)将流III与主要包含三恶烷,另外含有水和甲醛的再循环流VII混合,得到主要含有三恶烷,另外含有水和甲醛的流IIIa,c)蒸馏流IIIa 如果适当,则在进一步蒸馏阶段从流III或IIIa除去低锅炉后,在0.2至10巴的压力的第二蒸馏阶段中,第二蒸馏阶段中的压力比压力高至少0.1巴 在第一蒸馏阶段,获得三恶烷的流IV和主要包含三恶烷并另外包含的流V 和d)在0.1至4巴的压力下在第三蒸馏阶段中蒸馏物流V以获得主要包含水和另外甲醛的物流VI,以及主要包含三恶烷和另外的水的再循环流VII,以及 甲醛,e)如果合适,在第四蒸馏阶段中蒸馏物流VI以获得主要包含水的物流VIII和主要包含甲醛的物流IX。