Fluid bed vinyl acetate catalyst
    8.
    发明授权
    Fluid bed vinyl acetate catalyst 失效
    流化床乙酸乙烯酯催化剂

    公开(公告)号:US06358882B1

    公开(公告)日:2002-03-19

    申请号:US09455753

    申请日:1999-11-15

    IPC分类号: B01J2300

    摘要: A catalytically active material useful to prepare vinyl acetate monomer from ethylene, acetic acid, and an oxygen-containing gas under fluid bed conditions comprises a porous microspheroidal support containing catalytically active palladium crystallites finely dispersed within the support. This catalyst material does not require incorporation of gold to maintain activity and selectivity. A process to produce a vinyl acetate fluid bed catalyst in which catalytically active small palladium crystallites are finely dispersed within the support comprises dispersing selected metal species within the support which have an affinity to palladium to form very fine crystallites of palladium. The affinity metal species may be dispersed by impregnation onto a preformed microspheroidal support or may be intimately incorporated within the support before impregnation with a soluble palladium species.

    摘要翻译: 用于在流化床条件下从乙烯,乙酸和含氧气体制备乙酸乙烯酯单体的催化活性材料包括含有细分散在载体内的催化活性钯微晶的多孔微球载体。 该催化剂材料不需要掺入金以维持活性和选择性。 一种生产乙酸乙烯酯流化床催化剂的方法,其中催化活性的小钯微晶细分散在载体内,包括将选择的金属物质分散在载体中,其对钯具有亲合力,以形成非常细的钯微晶。 亲和金属物质可以通过浸渍分散到预形成的微球载体上,或者在用可溶性钯物质浸渍之前可以紧密地掺入载体内。

    Catalyst composition and process for making same
    10.
    发明授权
    Catalyst composition and process for making same 有权
    催化剂组成及其制备方法

    公开(公告)号:US06806382B2

    公开(公告)日:2004-10-19

    申请号:US10336755

    申请日:2003-01-06

    IPC分类号: C07C6705

    摘要: A process for preparing a supported metal catalyst composition which comprises impregnating microspheroidal support particles with a solution of at least one catalytically active metal, or precursor, drying the impregnated support particles and then treating the mobile metal, or precursor in a mobile state with a liquid comprising at least one reducing agent to deposit and immobilize the metal, or its precursor, in the support particles such that the metal, or its precursor, is distributed in the support particle in a layer below the surface of the support particle, the layer being between an inner and an outer region having a lower concentration of metal or precursor. Also, a composition comprising microspheroidal support particles having at least one catalytically active metal or precursor thereof distributed in a layer below the surface of the particles, the layer being between an inner and an outer region of the support particle each having a lower concentration of metal or precursor.

    摘要翻译: 一种制备负载型金属催化剂组合物的方法,其包括用至少一种催化活性金属或前体的溶液浸渍微球载体颗粒,干燥浸渍的载体颗粒,然后用液体处理移动状态的可移动金属或前体 包括至少一种还原剂,以将金属或其前体沉积并固定在载体颗粒中,使得金属或其前体在载体颗粒表面下方的层中分布在载体颗粒中,该层为 在具有较低浓度的金属或前体的内部和外部区域之间。 另外,包含具有至少一种催化活性金属或其前体的微球支持颗粒的组合物分布在颗粒表面下方的层中,该层位于支撑颗粒的内部和外部区域之间,每个区域具有较低的金属浓度 或前体。