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    Silver catalyst and a process for its preparation
    3.
    发明授权
    Silver catalyst and a process for its preparation 失效
    银催化剂及其制备方法

    公开(公告)号：US4829043A

    公开(公告)日：1989-05-09

    申请号：US134150

    申请日：1987-12-17

    申请人： Karl-Heinz Boehning ,  Wolf D. Mross ,  Matthias Schwarzmann ,  Hans-Juergen Becker ,  Juergen Plueckhan ,  Klaus-Christian Renner

    发明人： Karl-Heinz Boehning ,  Wolf D. Mross ,  Matthias Schwarzmann ,  Hans-Juergen Becker ,  Juergen Plueckhan ,  Klaus-Christian Renner

    IPC分类号： B01J23/66 ,  C07D301/10

    CPC分类号： C07D301/10 ,  B01J23/66

    摘要： A silver catalyst containing lithium and cesium as promoters for the direct oxidation of ethylene with oxygen to give ethylene oxide is applied to a porous carrier and essentially consists of .alpha.-alumina and contains certain amounts of soluble calcium, aluminum, potassium and sodium salts. The carrier has a BET surface area of from 0.4 to 0.8 m.sup.2 /g, a pore volume of not less than 0.45 ml/g, the pores being equally accessible to cold and warm water, a bulk density of less than 700 kg/m.sup.3 and a shape which, in the reactor, provides a geometrical surface area of not less than 600 m.sup.2 /m.sup.3, on which more than 13% by weight of silver are applied as active component and more than 115 kg of silver are available per m.sup.3 of reactor, and from 100 to 300 ppm by weight of lithium and from 200 to 600 ppm by weight of cesium are present as promoters. A process for the preparation of the silver catalyst and its use for the oxidation of ethylene are described.

    摘要翻译： 含有锂和铯作为用于直接氧化乙烯以产生环氧乙烷的促进剂的银催化剂被施加到多孔载体上，并且基本上由α-氧化铝组成并含有一定量的可溶性钙，铝，钾和钠盐。 载体的BET表面积为0.4至0.8m2 / g，孔体积不低于0.45ml / g，孔隙对于冷和热水均等可及，堆积密度小于700kg / m 3， 在反应器中，形成不小于600m 2 / m 3的几何表面积的形状，其上以13重量％以上的银作为活性组分，每立方米反应器可获得超过115kg的银 和100〜300重量ppm的锂和200〜600重量ppm的铯作为助催化剂存在。 描述了用于制备银催化剂的方法及其用于乙烯氧化的用途。

    Silver catalyst and its preparation
    4.
    发明授权
    Silver catalyst and its preparation 失效
    银催化剂及其制备

    公开(公告)号：US4740493A

    公开(公告)日：1988-04-26

    申请号：US889499

    申请日：1986-07-25

    申请人： Karl-Heinz Boehning ,  Wolf D. Mross ,  Matthias Schwarzmann ,  Hans-Juergen Becker ,  Juergen Plueckhan ,  Klaus-Christian Renner

    发明人： Karl-Heinz Boehning ,  Wolf D. Mross ,  Matthias Schwarzmann ,  Hans-Juergen Becker ,  Juergen Plueckhan ,  Klaus-Christian Renner

    IPC分类号： B01J23/66 ,  C07D301/10 ,  B01J21/04 ,  B01J23/50

    CPC分类号： B01J23/66 ,  C07D301/10

    摘要： A silver catalyst for the direct oxidation of ethylene with oxygen to give ethylene oxide is applied on a porous carrier and essentially consists of .alpha.-alumina and contains certain amounts of soluble calcium, aluminum, potassium and sodium salts. The carrier has a BET surface area of from 0.2 to 0.8 m.sup.2 /g, a pore volume of not less than 0.5 ml/g, the pores being equally accessible to cold and warm water, and a bulk density of less than 650 kg/m.sup.3, and has a shape which, in the reactor, provides a geometric surface area of not less than 600 m.sup.2 /m.sup.3, on which more than 13% by weight of silver are applied as the active component, more than 110 kg of silver being available per m.sup.3 of reactor.

    摘要翻译： 用于用氧直接氧化乙烯以产生环氧乙烷的银催化剂被施加到多孔载体上，并且基本上由α-氧化铝组成并含有一定量的可溶性钙，铝，钾和钠盐。 载体的BET表面积为0.2至0.8m2 / g，孔体积不小于0.5ml / g，孔隙对于冷和温水均等可及，并且堆积密度小于650kg / m 3 ，并且具有在反应器中提供不小于600m 2 / m 3的几何表面积的形状，其上施加超过13重量％的银作为活性组分，可获得超过110kg的银 每立方米反应堆。

    Preparation of a silver catalyst
    7.
    发明授权
    Preparation of a silver catalyst 失效
    银催化剂的制备

    公开(公告)号：US5011809A

    公开(公告)日：1991-04-30

    申请号：US471544

    申请日：1990-01-29

    申请人： Klaus Herzog ,  Karl-Heinz Boehning ,  Heinrich Aichinger ,  Juergen Plueckhan ,  Wolf D. Mross ,  Matthias Schwarzmann

    发明人： Klaus Herzog ,  Karl-Heinz Boehning ,  Heinrich Aichinger ,  Juergen Plueckhan ,  Wolf D. Mross ,  Matthias Schwarzmann

    IPC分类号： B01J23/66 ,  B01J37/02 ,  C07D301/10

    CPC分类号： B01J23/66 ,  B01J37/0201 ,  C07D301/10

    摘要： Supported silver catalysts which contain one or more alkali metals are prepared in a two-stage process by doping a basic catalyst which contains silver in metallic form and may also contain lithium with the heavy alkali metal sodium, potassium, rubidium and/or cesium using an impregnating solution which contains the heavy alkali metal and one or more nitrates of the general formulaR.sup.+ NO.sub.3.sup.-wherein R.sup.+ is an ammonium, hydrazinium, C.sub.1 -C.sub.12 -monoalkylammonium, C.sub.2 -C.sub.12 -dialkylammonium, C.sub.3 -C.sub.12 -trialkylammonium or C.sub.4 -C.sub.12 -tetraalkylammonium cation.

    摘要翻译： 含有一种或多种碱金属的负载型银催化剂通过掺杂含有金属形式的银的碱性催化剂并且还可以使用重质碱金属钠，钾，铷和/或铯来包含锂，通过两步法制备。 含有重质碱金属和一种或多种通式为R + NO 3 - 的硝酸盐的浸渍溶液，其中R +是铵，肼，C1-C12-单烷基铵，C2-C12-二烷基铵，C3-C12-三烷基铵或C4-C12 四烷基铵阳离子。